m4trace:/opt/homebrew/share/aclocal/ltargz.m4:13: -1- AC_DEFUN([LT_FUNC_ARGZ], [
dnl Required for use of '$SED' in Cygwin configuration.
AC_REQUIRE([AC_PROG_SED])dnl
AC_CHECK_HEADERS([argz.h], [], [], [AC_INCLUDES_DEFAULT])

AC_CHECK_TYPES([error_t],
  [],
  [AC_DEFINE([error_t], [int],
   [Define to a type to use for 'error_t' if it is not otherwise available.])
   AC_DEFINE([__error_t_defined], [1], [Define so that glibc/gnulib argp.h
    does not typedef error_t.])],
  [#if defined(HAVE_ARGZ_H)
#  include <argz.h>
#endif])

LT_ARGZ_H=
AC_CHECK_FUNCS([argz_add argz_append argz_count argz_create_sep argz_insert \
	argz_next argz_stringify], [], [LT_ARGZ_H=lt__argz.h; AC_LIBOBJ([lt__argz])])

dnl if have system argz functions, allow forced use of
dnl libltdl-supplied implementation (and default to do so
dnl on "known bad" systems). Could use a runtime check, but
dnl (a) detecting malloc issues is notoriously unreliable
dnl (b) only known system that declares argz functions,
dnl     provides them, yet they are broken, is cygwin
dnl     releases prior to 16-Mar-2007 (1.5.24 and earlier)
dnl So, it's more straightforward simply to special case
dnl this for known bad systems.
AS_IF([test -z "$LT_ARGZ_H"],
    [AC_CACHE_CHECK(
        [if argz actually works],
        [lt_cv_sys_argz_works],
        [[case $host_os in #(
	 *cygwin*)
	   lt_cv_sys_argz_works=no
	   if test no != "$cross_compiling"; then
	     lt_cv_sys_argz_works="guessing no"
	   else
	     lt_sed_extract_leading_digits='s/^\([0-9\.]*\).*/\1/'
	     save_IFS=$IFS
	     IFS=-.
	     set x `uname -r | $SED -e "$lt_sed_extract_leading_digits"`
	     IFS=$save_IFS
	     lt_os_major=${2-0}
	     lt_os_minor=${3-0}
	     lt_os_micro=${4-0}
	     if test 1 -lt "$lt_os_major" \
		|| { test 1 -eq "$lt_os_major" \
		  && { test 5 -lt "$lt_os_minor" \
		    || { test 5 -eq "$lt_os_minor" \
		      && test 24 -lt "$lt_os_micro"; }; }; }; then
	       lt_cv_sys_argz_works=yes
	     fi
	   fi
	   ;; #(
	 *) lt_cv_sys_argz_works=yes ;;
	 esac]])
     AS_IF([test yes = "$lt_cv_sys_argz_works"],
        [AC_DEFINE([HAVE_WORKING_ARGZ], 1,
                   [This value is set to 1 to indicate that the system argz facility works])],
        [LT_ARGZ_H=lt__argz.h
        AC_LIBOBJ([lt__argz])])])

AC_SUBST([LT_ARGZ_H])
])
m4trace:/opt/homebrew/share/aclocal/ltdl.m4:17: -1- AC_DEFUN([LT_CONFIG_LTDL_DIR], [AC_BEFORE([$0], [LTDL_INIT])
_$0($*)
])
m4trace:/opt/homebrew/share/aclocal/ltdl.m4:69: -1- AC_DEFUN([LTDL_CONVENIENCE], [AC_BEFORE([$0], [LTDL_INIT])dnl
dnl Although the argument is deprecated and no longer documented,
dnl LTDL_CONVENIENCE used to take a DIRECTORY orgument, if we have one
dnl here make sure it is the same as any other declaration of libltdl's
dnl location!  This also ensures lt_ltdl_dir is set when configure.ac is
dnl not yet using an explicit LT_CONFIG_LTDL_DIR.
m4_ifval([$1], [_LT_CONFIG_LTDL_DIR([$1])])dnl
_$0()
])
m4trace:/opt/homebrew/share/aclocal/ltdl.m4:82: -1- AU_DEFUN([AC_LIBLTDL_CONVENIENCE], [_LT_CONFIG_LTDL_DIR([m4_default([$1], [libltdl])])
_LTDL_CONVENIENCE])
m4trace:/opt/homebrew/share/aclocal/ltdl.m4:82: -1- AC_DEFUN([AC_LIBLTDL_CONVENIENCE], [m4_warn([obsolete], [The macro 'AC_LIBLTDL_CONVENIENCE' is obsolete.
You should run autoupdate.])dnl
_LT_CONFIG_LTDL_DIR([m4_default([$1], [libltdl])])
_LTDL_CONVENIENCE])
m4trace:/opt/homebrew/share/aclocal/ltdl.m4:125: -1- AC_DEFUN([LTDL_INSTALLABLE], [AC_BEFORE([$0], [LTDL_INIT])dnl
dnl Although the argument is deprecated and no longer documented,
dnl LTDL_INSTALLABLE used to take a DIRECTORY orgument, if we have one
dnl here make sure it is the same as any other declaration of libltdl's
dnl location!  This also ensures lt_ltdl_dir is set when configure.ac is
dnl not yet using an explicit LT_CONFIG_LTDL_DIR.
m4_ifval([$1], [_LT_CONFIG_LTDL_DIR([$1])])dnl
_$0()
])
m4trace:/opt/homebrew/share/aclocal/ltdl.m4:138: -1- AU_DEFUN([AC_LIBLTDL_INSTALLABLE], [_LT_CONFIG_LTDL_DIR([m4_default([$1], [libltdl])])
_LTDL_INSTALLABLE])
m4trace:/opt/homebrew/share/aclocal/ltdl.m4:138: -1- AC_DEFUN([AC_LIBLTDL_INSTALLABLE], [m4_warn([obsolete], [The macro 'AC_LIBLTDL_INSTALLABLE' is obsolete.
You should run autoupdate.])dnl
_LT_CONFIG_LTDL_DIR([m4_default([$1], [libltdl])])
_LTDL_INSTALLABLE])
m4trace:/opt/homebrew/share/aclocal/ltdl.m4:214: -1- AC_DEFUN([_LT_LIBOBJ], [
  m4_pattern_allow([^_LT_LIBOBJS$])
  _LT_LIBOBJS="$_LT_LIBOBJS $1.$ac_objext"
])
m4trace:/opt/homebrew/share/aclocal/ltdl.m4:227: -1- AC_DEFUN([LTDL_INIT], [dnl Parse OPTIONS
_LT_SET_OPTIONS([$0], [$1])

dnl We need to keep our own list of libobjs separate from our parent project,
dnl and the easiest way to do that is redefine the AC_LIBOBJs macro while
dnl we look for our own LIBOBJs.
m4_pushdef([AC_LIBOBJ], m4_defn([_LT_LIBOBJ]))
m4_pushdef([AC_LIBSOURCES])

dnl If not otherwise defined, default to the 1.5.x compatible subproject mode:
m4_if(_LTDL_MODE, [],
        [m4_define([_LTDL_MODE], m4_default([$2], [subproject]))
        m4_if([-1], [m4_bregexp(_LTDL_MODE, [\(subproject\|\(non\)?recursive\)])],
                [m4_fatal([unknown libltdl mode: ]_LTDL_MODE)])])

AC_ARG_WITH([included_ltdl],
    [AS_HELP_STRING([--with-included-ltdl],
                    [use the GNU ltdl sources included here])])

if test yes != "$with_included_ltdl"; then
  # We are not being forced to use the included libltdl sources, so
  # decide whether there is a useful installed version we can use.
  AC_CHECK_HEADER([ltdl.h],
      [AC_CHECK_DECL([lt_dlinterface_register],
	   [AC_CHECK_LIB([ltdl], [lt_dladvise_preload],
	       [with_included_ltdl=no],
	       [with_included_ltdl=yes])],
	   [with_included_ltdl=yes],
	   [AC_INCLUDES_DEFAULT
	    #include <ltdl.h>])],
      [with_included_ltdl=yes],
      [AC_INCLUDES_DEFAULT]
  )
fi

dnl If neither LT_CONFIG_LTDL_DIR, LTDL_CONVENIENCE nor LTDL_INSTALLABLE
dnl was called yet, then for old times' sake, we assume libltdl is in an
dnl eponymous directory:
AC_PROVIDE_IFELSE([LT_CONFIG_LTDL_DIR], [], [_LT_CONFIG_LTDL_DIR([libltdl])])

AC_ARG_WITH([ltdl_include],
    [AS_HELP_STRING([--with-ltdl-include=DIR],
                    [use the ltdl headers installed in DIR])])

if test -n "$with_ltdl_include"; then
  if test -f "$with_ltdl_include/ltdl.h"; then :
  else
    AC_MSG_ERROR([invalid ltdl include directory: '$with_ltdl_include'])
  fi
else
  with_ltdl_include=no
fi

AC_ARG_WITH([ltdl_lib],
    [AS_HELP_STRING([--with-ltdl-lib=DIR],
                    [use the libltdl.la installed in DIR])])

if test -n "$with_ltdl_lib"; then
  if test -f "$with_ltdl_lib/libltdl.la"; then :
  else
    AC_MSG_ERROR([invalid ltdl library directory: '$with_ltdl_lib'])
  fi
else
  with_ltdl_lib=no
fi

case ,$with_included_ltdl,$with_ltdl_include,$with_ltdl_lib, in
  ,yes,no,no,)
	m4_case(m4_default(_LTDL_TYPE, [convenience]),
	    [convenience], [_LTDL_CONVENIENCE],
	    [installable], [_LTDL_INSTALLABLE],
	  [m4_fatal([unknown libltdl build type: ]_LTDL_TYPE)])
	;;
  ,no,no,no,)
	# If the included ltdl is not to be used, then use the
	# preinstalled libltdl we found.
	AC_DEFINE([HAVE_LTDL], [1],
	  [Define this if a modern libltdl is already installed])
	LIBLTDL=-lltdl
	LTDLDEPS=
	LTDLINCL=
	;;
  ,no*,no,*)
	AC_MSG_ERROR(['--with-ltdl-include' and '--with-ltdl-lib' options must be used together])
	;;
  *)	with_included_ltdl=no
	LIBLTDL="-L$with_ltdl_lib -lltdl"
	LTDLDEPS=
	LTDLINCL=-I$with_ltdl_include
	;;
esac
INCLTDL=$LTDLINCL

# Report our decision...
AC_MSG_CHECKING([where to find libltdl headers])
AC_MSG_RESULT([$LTDLINCL])
AC_MSG_CHECKING([where to find libltdl library])
AC_MSG_RESULT([$LIBLTDL])

_LTDL_SETUP

dnl restore autoconf definition.
m4_popdef([AC_LIBOBJ])
m4_popdef([AC_LIBSOURCES])

AC_CONFIG_COMMANDS_PRE([
    _ltdl_libobjs=
    _ltdl_ltlibobjs=
    if test -n "$_LT_LIBOBJS"; then
      # Remove the extension.
      _lt_sed_drop_objext='s/\.o$//;s/\.obj$//'
      for i in `for i in $_LT_LIBOBJS; do echo "$i"; done | $SED "$_lt_sed_drop_objext" | sort -u`; do
        _ltdl_libobjs="$_ltdl_libobjs $lt_libobj_prefix$i.$ac_objext"
        _ltdl_ltlibobjs="$_ltdl_ltlibobjs $lt_libobj_prefix$i.lo"
      done
    fi
    AC_SUBST([ltdl_LIBOBJS], [$_ltdl_libobjs])
    AC_SUBST([ltdl_LTLIBOBJS], [$_ltdl_ltlibobjs])
])

# Only expand once:
m4_define([LTDL_INIT])
])
m4trace:/opt/homebrew/share/aclocal/ltdl.m4:353: -1- AU_DEFUN([AC_LIB_LTDL], [LTDL_INIT($@)])
m4trace:/opt/homebrew/share/aclocal/ltdl.m4:353: -1- AC_DEFUN([AC_LIB_LTDL], [m4_warn([obsolete], [The macro 'AC_LIB_LTDL' is obsolete.
You should run autoupdate.])dnl
LTDL_INIT($@)])
m4trace:/opt/homebrew/share/aclocal/ltdl.m4:354: -1- AU_DEFUN([AC_WITH_LTDL], [LTDL_INIT($@)])
m4trace:/opt/homebrew/share/aclocal/ltdl.m4:354: -1- AC_DEFUN([AC_WITH_LTDL], [m4_warn([obsolete], [The macro 'AC_WITH_LTDL' is obsolete.
You should run autoupdate.])dnl
LTDL_INIT($@)])
m4trace:/opt/homebrew/share/aclocal/ltdl.m4:355: -1- AU_DEFUN([LT_WITH_LTDL], [LTDL_INIT($@)])
m4trace:/opt/homebrew/share/aclocal/ltdl.m4:355: -1- AC_DEFUN([LT_WITH_LTDL], [m4_warn([obsolete], [The macro 'LT_WITH_LTDL' is obsolete.
You should run autoupdate.])dnl
LTDL_INIT($@)])
m4trace:/opt/homebrew/share/aclocal/ltdl.m4:368: -1- AC_DEFUN([_LTDL_SETUP], [AC_REQUIRE([AC_PROG_CC])dnl
AC_REQUIRE([LT_SYS_MODULE_EXT])dnl
AC_REQUIRE([LT_SYS_MODULE_PATH])dnl
AC_REQUIRE([LT_SYS_DLSEARCH_PATH])dnl
AC_REQUIRE([LT_LIB_DLLOAD])dnl
AC_REQUIRE([LT_SYS_SYMBOL_USCORE])dnl
AC_REQUIRE([LT_FUNC_DLSYM_USCORE])dnl
AC_REQUIRE([LT_SYS_DLOPEN_DEPLIBS])dnl
AC_REQUIRE([LT_FUNC_ARGZ])dnl

m4_require([_LT_CHECK_OBJDIR])dnl
m4_require([_LT_HEADER_DLFCN])dnl
m4_require([_LT_CHECK_DLPREOPEN])dnl
m4_require([_LT_DECL_SED])dnl

dnl Don't require this, or it will be expanded earlier than the code
dnl that sets the variables it relies on:
_LT_ENABLE_INSTALL

dnl _LTDL_MODE specific code must be called at least once:
_LTDL_MODE_DISPATCH

# In order that ltdl.c can compile, find out the first AC_CONFIG_HEADERS
# the user used.  This is so that ltdl.h can pick up the parent projects
# config.h file, The first file in AC_CONFIG_HEADERS must contain the
# definitions required by ltdl.c.
# FIXME: Remove use of undocumented AC_LIST_HEADERS (2.59 compatibility).
AC_CONFIG_COMMANDS_PRE([dnl
m4_pattern_allow([^LT_CONFIG_H$])dnl
m4_ifset([AH_HEADER],
    [LT_CONFIG_H=AH_HEADER],
    [m4_ifset([AC_LIST_HEADERS],
	    [LT_CONFIG_H=`echo "AC_LIST_HEADERS" | $SED 's|^[[      ]]*||;s|[[ :]].*$||'`],
	[])])])
AC_SUBST([LT_CONFIG_H])

AC_CHECK_HEADERS([unistd.h dl.h sys/dl.h dld.h mach-o/dyld.h dirent.h],
	[], [], [AC_INCLUDES_DEFAULT])

AC_CHECK_FUNCS([closedir opendir readdir], [], [AC_LIBOBJ([lt__dirent])])
AC_CHECK_FUNCS([strlcat strlcpy], [], [AC_LIBOBJ([lt__strl])])

m4_pattern_allow([LT_LIBEXT])dnl
AC_DEFINE_UNQUOTED([LT_LIBEXT],["$libext"],[The archive extension])

name=
eval "lt_libprefix=\"$libname_spec\""
m4_pattern_allow([LT_LIBPREFIX])dnl
AC_DEFINE_UNQUOTED([LT_LIBPREFIX],["$lt_libprefix"],[The archive prefix])

name=ltdl
eval "LTDLOPEN=\"$libname_spec\""
AC_SUBST([LTDLOPEN])
])
m4trace:/opt/homebrew/share/aclocal/ltdl.m4:445: -1- AC_DEFUN([LT_SYS_DLOPEN_DEPLIBS], [AC_REQUIRE([AC_CANONICAL_HOST])dnl
AC_CACHE_CHECK([whether deplibs are loaded by dlopen],
  [lt_cv_sys_dlopen_deplibs],
  [# PORTME does your system automatically load deplibs for dlopen?
  # or its logical equivalent (e.g. shl_load for HP-UX < 11)
  # For now, we just catch OSes we know something about -- in the
  # future, we'll try test this programmatically.
  lt_cv_sys_dlopen_deplibs=unknown
  case $host_os in
  aix3*|aix4.1.*|aix4.2.*)
    # Unknown whether this is true for these versions of AIX, but
    # we want this 'case' here to explicitly catch those versions.
    lt_cv_sys_dlopen_deplibs=unknown
    ;;
  aix[[4-9]]*)
    lt_cv_sys_dlopen_deplibs=yes
    ;;
  amigaos*)
    case $host_cpu in
    powerpc)
      lt_cv_sys_dlopen_deplibs=no
      ;;
    esac
    ;;
  darwin*)
    # Assuming the user has installed a libdl from somewhere, this is true
    # If you are looking for one http://www.opendarwin.org/projects/dlcompat
    lt_cv_sys_dlopen_deplibs=yes
    ;;
  freebsd* | dragonfly* | midnightbsd*)
    lt_cv_sys_dlopen_deplibs=yes
    ;;
  gnu* | linux* | k*bsd*-gnu | kopensolaris*-gnu)
    # GNU and its variants, using gnu ld.so (Glibc)
    lt_cv_sys_dlopen_deplibs=yes
    ;;
  hpux10*|hpux11*)
    lt_cv_sys_dlopen_deplibs=yes
    ;;
  interix*)
    lt_cv_sys_dlopen_deplibs=yes
    ;;
  irix[[12345]]*|irix6.[[01]]*)
    # Catch all versions of IRIX before 6.2, and indicate that we don't
    # know how it worked for any of those versions.
    lt_cv_sys_dlopen_deplibs=unknown
    ;;
  irix*)
    # The case above catches anything before 6.2, and it's known that
    # at 6.2 and later dlopen does load deplibs.
    lt_cv_sys_dlopen_deplibs=yes
    ;;
  *-mlibc)
    lt_cv_sys_dlopen_deplibs=yes
    ;;
  netbsd* | netbsdelf*-gnu)
    lt_cv_sys_dlopen_deplibs=yes
    ;;
  openbsd*)
    lt_cv_sys_dlopen_deplibs=yes
    ;;
  osf[[1234]]*)
    # dlopen did load deplibs (at least at 4.x), but until the 5.x series,
    # it did *not* use an RPATH in a shared library to find objects the
    # library depends on, so we explicitly say 'no'.
    lt_cv_sys_dlopen_deplibs=no
    ;;
  osf5.0|osf5.0a|osf5.1)
    # dlopen *does* load deplibs and with the right loader patch applied
    # it even uses RPATH in a shared library to search for shared objects
    # that the library depends on, but there's no easy way to know if that
    # patch is installed.  Since this is the case, all we can really
    # say is unknown -- it depends on the patch being installed.  If
    # it is, this changes to 'yes'.  Without it, it would be 'no'.
    lt_cv_sys_dlopen_deplibs=unknown
    ;;
  osf*)
    # the two cases above should catch all versions of osf <= 5.1.  Read
    # the comments above for what we know about them.
    # At > 5.1, deplibs are loaded *and* any RPATH in a shared library
    # is used to find them so we can finally say 'yes'.
    lt_cv_sys_dlopen_deplibs=yes
    ;;
  qnx*)
    lt_cv_sys_dlopen_deplibs=yes
    ;;
  solaris*)
    lt_cv_sys_dlopen_deplibs=yes
    ;;
  sysv5* | sco3.2v5* | sco5v6* | unixware* | OpenUNIX* | sysv4*uw2*)
    libltdl_cv_sys_dlopen_deplibs=yes
    ;;
  esac
  ])
if test yes != "$lt_cv_sys_dlopen_deplibs"; then
 AC_DEFINE([LTDL_DLOPEN_DEPLIBS], [1],
    [Define if the OS needs help to load dependent libraries for dlopen().])
fi
])
m4trace:/opt/homebrew/share/aclocal/ltdl.m4:547: -1- AU_DEFUN([AC_LTDL_SYS_DLOPEN_DEPLIBS], [m4_if($#, 0, [LT_SYS_DLOPEN_DEPLIBS], [LT_SYS_DLOPEN_DEPLIBS($@)])], [], [])
m4trace:/opt/homebrew/share/aclocal/ltdl.m4:547: -1- AC_DEFUN([AC_LTDL_SYS_DLOPEN_DEPLIBS], [m4_warn([obsolete], [The macro 'AC_LTDL_SYS_DLOPEN_DEPLIBS' is obsolete.
You should run autoupdate.])dnl
m4_if($#, 0, [LT_SYS_DLOPEN_DEPLIBS], [LT_SYS_DLOPEN_DEPLIBS($@)])])
m4trace:/opt/homebrew/share/aclocal/ltdl.m4:554: -1- AC_DEFUN([LT_SYS_MODULE_EXT], [m4_require([_LT_SYS_DYNAMIC_LINKER])dnl
AC_CACHE_CHECK([what extension is used for runtime loadable modules],
  [libltdl_cv_shlibext],
[
module=yes
eval libltdl_cv_shlibext=$shrext_cmds
module=no
eval libltdl_cv_shrext=$shrext_cmds
  ])
if test -n "$libltdl_cv_shlibext"; then
  m4_pattern_allow([LT_MODULE_EXT])dnl
  AC_DEFINE_UNQUOTED([LT_MODULE_EXT], ["$libltdl_cv_shlibext"],
    [Define to the extension used for runtime loadable modules, say, ".so".])
fi
if test "$libltdl_cv_shrext" != "$libltdl_cv_shlibext"; then
  m4_pattern_allow([LT_SHARED_EXT])dnl
  AC_DEFINE_UNQUOTED([LT_SHARED_EXT], ["$libltdl_cv_shrext"],
    [Define to the shared library suffix, say, ".dylib".])
fi
if test -n "$shared_archive_member_spec"; then
  m4_pattern_allow([LT_SHARED_LIB_MEMBER])dnl
  AC_DEFINE_UNQUOTED([LT_SHARED_LIB_MEMBER], ["($shared_archive_member_spec.o)"],
    [Define to the shared archive member specification, say "(shr.o)".])
fi
])
m4trace:/opt/homebrew/share/aclocal/ltdl.m4:582: -1- AU_DEFUN([AC_LTDL_SHLIBEXT], [m4_if($#, 0, [LT_SYS_MODULE_EXT], [LT_SYS_MODULE_EXT($@)])], [], [])
m4trace:/opt/homebrew/share/aclocal/ltdl.m4:582: -1- AC_DEFUN([AC_LTDL_SHLIBEXT], [m4_warn([obsolete], [The macro 'AC_LTDL_SHLIBEXT' is obsolete.
You should run autoupdate.])dnl
m4_if($#, 0, [LT_SYS_MODULE_EXT], [LT_SYS_MODULE_EXT($@)])])
m4trace:/opt/homebrew/share/aclocal/ltdl.m4:589: -1- AC_DEFUN([LT_SYS_MODULE_PATH], [m4_require([_LT_SYS_DYNAMIC_LINKER])dnl
AC_CACHE_CHECK([what variable specifies run-time module search path],
  [lt_cv_module_path_var], [lt_cv_module_path_var=$shlibpath_var])
if test -n "$lt_cv_module_path_var"; then
  m4_pattern_allow([LT_MODULE_PATH_VAR])dnl
  AC_DEFINE_UNQUOTED([LT_MODULE_PATH_VAR], ["$lt_cv_module_path_var"],
    [Define to the name of the environment variable that determines the run-time module search path.])
fi
])
m4trace:/opt/homebrew/share/aclocal/ltdl.m4:601: -1- AU_DEFUN([AC_LTDL_SHLIBPATH], [m4_if($#, 0, [LT_SYS_MODULE_PATH], [LT_SYS_MODULE_PATH($@)])], [], [])
m4trace:/opt/homebrew/share/aclocal/ltdl.m4:601: -1- AC_DEFUN([AC_LTDL_SHLIBPATH], [m4_warn([obsolete], [The macro 'AC_LTDL_SHLIBPATH' is obsolete.
You should run autoupdate.])dnl
m4_if($#, 0, [LT_SYS_MODULE_PATH], [LT_SYS_MODULE_PATH($@)])])
m4trace:/opt/homebrew/share/aclocal/ltdl.m4:608: -1- AC_DEFUN([LT_SYS_DLSEARCH_PATH], [m4_require([_LT_SYS_DYNAMIC_LINKER])dnl
AC_CACHE_CHECK([for the default library search path],
  [lt_cv_sys_dlsearch_path],
  [lt_cv_sys_dlsearch_path=$sys_lib_dlsearch_path_spec])
if test -n "$lt_cv_sys_dlsearch_path"; then
  sys_dlsearch_path=
  for dir in $lt_cv_sys_dlsearch_path; do
    if test -z "$sys_dlsearch_path"; then
      sys_dlsearch_path=$dir
    else
      sys_dlsearch_path=$sys_dlsearch_path$PATH_SEPARATOR$dir
    fi
  done
  m4_pattern_allow([LT_DLSEARCH_PATH])dnl
  AC_DEFINE_UNQUOTED([LT_DLSEARCH_PATH], ["$sys_dlsearch_path"],
    [Define to the system default library search path.])
fi
])
m4trace:/opt/homebrew/share/aclocal/ltdl.m4:629: -1- AU_DEFUN([AC_LTDL_SYSSEARCHPATH], [m4_if($#, 0, [LT_SYS_DLSEARCH_PATH], [LT_SYS_DLSEARCH_PATH($@)])], [], [])
m4trace:/opt/homebrew/share/aclocal/ltdl.m4:629: -1- AC_DEFUN([AC_LTDL_SYSSEARCHPATH], [m4_warn([obsolete], [The macro 'AC_LTDL_SYSSEARCHPATH' is obsolete.
You should run autoupdate.])dnl
m4_if($#, 0, [LT_SYS_DLSEARCH_PATH], [LT_SYS_DLSEARCH_PATH($@)])])
m4trace:/opt/homebrew/share/aclocal/ltdl.m4:655: -1- AC_DEFUN([LT_LIB_DLLOAD], [m4_pattern_allow([^LT_DLLOADERS$])
LT_DLLOADERS=
AC_SUBST([LT_DLLOADERS])

AC_LANG_PUSH([C])
lt_dlload_save_LIBS=$LIBS

LIBADD_DLOPEN=
AC_SEARCH_LIBS([dlopen], [dl],
	[AC_DEFINE([HAVE_LIBDL], [1],
		   [Define if you have the libdl library or equivalent.])
	if test "$ac_cv_search_dlopen" != "none required"; then
	  LIBADD_DLOPEN=-ldl
	fi
	libltdl_cv_lib_dl_dlopen=yes
	LT_DLLOADERS="$LT_DLLOADERS ${lt_dlopen_dir+$lt_dlopen_dir/}dlopen.la"],
    [AC_LINK_IFELSE([AC_LANG_PROGRAM([[#if HAVE_DLFCN_H
#  include <dlfcn.h>
#endif
    ]], [[dlopen(0, 0);]])],
	    [AC_DEFINE([HAVE_LIBDL], [1],
		       [Define if you have the libdl library or equivalent.])
	    libltdl_cv_func_dlopen=yes
	    LT_DLLOADERS="$LT_DLLOADERS ${lt_dlopen_dir+$lt_dlopen_dir/}dlopen.la"],
	[AC_CHECK_LIB([svld], [dlopen],
		[AC_DEFINE([HAVE_LIBDL], [1],
			 [Define if you have the libdl library or equivalent.])
	        LIBADD_DLOPEN=-lsvld libltdl_cv_func_dlopen=yes
		LT_DLLOADERS="$LT_DLLOADERS ${lt_dlopen_dir+$lt_dlopen_dir/}dlopen.la"])])])
if test yes = "$libltdl_cv_func_dlopen" || test yes = "$libltdl_cv_lib_dl_dlopen"
then
  lt_save_LIBS=$LIBS
  LIBS="$LIBS $LIBADD_DLOPEN"
  AC_CHECK_FUNCS([dlerror])
  LIBS=$lt_save_LIBS
fi
AC_SUBST([LIBADD_DLOPEN])

LIBADD_SHL_LOAD=
AC_CHECK_FUNC([shl_load],
	[AC_DEFINE([HAVE_SHL_LOAD], [1],
		   [Define if you have the shl_load function.])
	LT_DLLOADERS="$LT_DLLOADERS ${lt_dlopen_dir+$lt_dlopen_dir/}shl_load.la"],
    [AC_CHECK_LIB([dld], [shl_load],
	    [AC_DEFINE([HAVE_SHL_LOAD], [1],
		       [Define if you have the shl_load function.])
	    LT_DLLOADERS="$LT_DLLOADERS ${lt_dlopen_dir+$lt_dlopen_dir/}shl_load.la"
	    LIBADD_SHL_LOAD=-ldld])])
AC_SUBST([LIBADD_SHL_LOAD])

case $host_os in
darwin[[1567]].*)
# We only want this for pre-Mac OS X 10.4.
  AC_CHECK_FUNC([_dyld_func_lookup],
	[AC_DEFINE([HAVE_DYLD], [1],
		   [Define if you have the _dyld_func_lookup function.])
	LT_DLLOADERS="$LT_DLLOADERS ${lt_dlopen_dir+$lt_dlopen_dir/}dyld.la"])
  ;;
beos*)
  LT_DLLOADERS="$LT_DLLOADERS ${lt_dlopen_dir+$lt_dlopen_dir/}load_add_on.la"
  ;;
cygwin* | mingw* | windows* | pw32*)
  AC_CHECK_DECLS([cygwin_conv_path], [], [], [[#include <sys/cygwin.h>]])
  LT_DLLOADERS="$LT_DLLOADERS ${lt_dlopen_dir+$lt_dlopen_dir/}loadlibrary.la"
  ;;
esac

AC_CHECK_LIB([dld], [dld_link],
	[AC_DEFINE([HAVE_DLD], [1],
		   [Define if you have the GNU dld library.])
		LT_DLLOADERS="$LT_DLLOADERS ${lt_dlopen_dir+$lt_dlopen_dir/}dld_link.la"])
AC_SUBST([LIBADD_DLD_LINK])

m4_pattern_allow([^LT_DLPREOPEN$])
LT_DLPREOPEN=
if test -n "$LT_DLLOADERS"
then
  for lt_loader in $LT_DLLOADERS; do
    LT_DLPREOPEN="$LT_DLPREOPEN-dlpreopen $lt_loader "
  done
  AC_DEFINE([HAVE_LIBDLLOADER], [1],
            [Define if libdlloader will be built on this platform])
fi
AC_SUBST([LT_DLPREOPEN])

dnl This isn't used anymore, but set it for backwards compatibility
LIBADD_DL="$LIBADD_DLOPEN $LIBADD_SHL_LOAD"
AC_SUBST([LIBADD_DL])

LIBS=$lt_dlload_save_LIBS
AC_LANG_POP
])
m4trace:/opt/homebrew/share/aclocal/ltdl.m4:750: -1- AU_DEFUN([AC_LTDL_DLLIB], [m4_if($#, 0, [LT_LIB_DLLOAD], [LT_LIB_DLLOAD($@)])], [], [])
m4trace:/opt/homebrew/share/aclocal/ltdl.m4:750: -1- AC_DEFUN([AC_LTDL_DLLIB], [m4_warn([obsolete], [The macro 'AC_LTDL_DLLIB' is obsolete.
You should run autoupdate.])dnl
m4_if($#, 0, [LT_LIB_DLLOAD], [LT_LIB_DLLOAD($@)])])
m4trace:/opt/homebrew/share/aclocal/ltdl.m4:758: -1- AC_DEFUN([LT_SYS_SYMBOL_USCORE], [m4_require([_LT_CMD_GLOBAL_SYMBOLS])dnl
AC_CACHE_CHECK([for _ prefix in compiled symbols],
  [lt_cv_sys_symbol_underscore],
  [lt_cv_sys_symbol_underscore=no
  cat > conftest.$ac_ext <<_LT_EOF
void nm_test_func(){}
int main(void){nm_test_func;return 0;}
_LT_EOF
  if AC_TRY_EVAL(ac_compile); then
    # Now try to grab the symbols.
    ac_nlist=conftest.nm
    if AC_TRY_EVAL(NM conftest.$ac_objext \| $lt_cv_sys_global_symbol_pipe \> $ac_nlist) && test -s "$ac_nlist"; then
      # See whether the symbols have a leading underscore.
      if grep '^. _nm_test_func' "$ac_nlist" >/dev/null; then
        lt_cv_sys_symbol_underscore=yes
      else
        if grep '^. nm_test_func ' "$ac_nlist" >/dev/null; then
	  :
        else
	  echo "configure: cannot find nm_test_func in $ac_nlist" >&AS_MESSAGE_LOG_FD
        fi
      fi
    else
      echo "configure: cannot run $lt_cv_sys_global_symbol_pipe" >&AS_MESSAGE_LOG_FD
    fi
  else
    echo "configure: failed program was:" >&AS_MESSAGE_LOG_FD
    cat conftest.c >&AS_MESSAGE_LOG_FD
  fi
  rm -rf conftest*
  ])
  sys_symbol_underscore=$lt_cv_sys_symbol_underscore
  AC_SUBST([sys_symbol_underscore])
])
m4trace:/opt/homebrew/share/aclocal/ltdl.m4:795: -1- AU_DEFUN([AC_LTDL_SYMBOL_USCORE], [m4_if($#, 0, [LT_SYS_SYMBOL_USCORE], [LT_SYS_SYMBOL_USCORE($@)])], [], [])
m4trace:/opt/homebrew/share/aclocal/ltdl.m4:795: -1- AC_DEFUN([AC_LTDL_SYMBOL_USCORE], [m4_warn([obsolete], [The macro 'AC_LTDL_SYMBOL_USCORE' is obsolete.
You should run autoupdate.])dnl
m4_if($#, 0, [LT_SYS_SYMBOL_USCORE], [LT_SYS_SYMBOL_USCORE($@)])])
m4trace:/opt/homebrew/share/aclocal/ltdl.m4:802: -1- AC_DEFUN([LT_FUNC_DLSYM_USCORE], [AC_REQUIRE([_LT_COMPILER_PIC])dnl	for lt_prog_compiler_wl
AC_REQUIRE([LT_SYS_SYMBOL_USCORE])dnl	for lt_cv_sys_symbol_underscore
AC_REQUIRE([LT_SYS_MODULE_EXT])dnl	for libltdl_cv_shlibext
if test yes = "$lt_cv_sys_symbol_underscore"; then
  if test yes = "$libltdl_cv_func_dlopen" || test yes = "$libltdl_cv_lib_dl_dlopen"; then
    AC_CACHE_CHECK([whether we have to add an underscore for dlsym],
      [libltdl_cv_need_uscore],
      [libltdl_cv_need_uscore=unknown
      dlsym_uscore_save_LIBS=$LIBS
      LIBS="$LIBS $LIBADD_DLOPEN"
      libname=conftmod # stay within 8.3 filename limits!
      cat >$libname.$ac_ext <<_LT_EOF
[#line $LINENO "configure"
#include "confdefs.h"
/* When -fvisibility=hidden is used, assume the code has been annotated
   correspondingly for the symbols needed.  */
#if defined __GNUC__ && (((__GNUC__ == 3) && (__GNUC_MINOR__ >= 3)) || (__GNUC__ > 3))
int fnord () __attribute__((visibility("default")));
#endif
int fnord () { return 42; }]
_LT_EOF

      # ltfn_module_cmds module_cmds
      # Execute tilde-delimited MODULE_CMDS with environment primed for
      # $module_cmds or $archive_cmds type content.
      ltfn_module_cmds ()
      {( # subshell avoids polluting parent global environment
          module_cmds_save_ifs=$IFS; IFS='~'
          for cmd in @S|@1; do
            IFS=$module_cmds_save_ifs
            libobjs=$libname.$ac_objext; lib=$libname$libltdl_cv_shlibext
            rpath=/not-exists; soname=$libname$libltdl_cv_shlibext; output_objdir=.
            major=; versuffix=; verstring=; deplibs=
            ECHO=echo; wl=$lt_prog_compiler_wl; allow_undefined_flag=
            eval $cmd
          done
          IFS=$module_cmds_save_ifs
      )}

      # Compile a loadable module using libtool macro expansion results.
      $CC $pic_flag -c $libname.$ac_ext
      ltfn_module_cmds "${module_cmds:-$archive_cmds}"

      # Try to fetch fnord with dlsym().
      libltdl_dlunknown=0; libltdl_dlnouscore=1; libltdl_dluscore=2
      cat >conftest.$ac_ext <<_LT_EOF
[#line $LINENO "configure"
#include "confdefs.h"
#if HAVE_DLFCN_H
#include <dlfcn.h>
#endif
#include <stdio.h>
#ifndef RTLD_GLOBAL
#  ifdef DL_GLOBAL
#    define RTLD_GLOBAL DL_GLOBAL
#  else
#    define RTLD_GLOBAL 0
#  endif
#endif
#ifndef RTLD_NOW
#  ifdef DL_NOW
#    define RTLD_NOW DL_NOW
#  else
#    define RTLD_NOW 0
#  endif
#endif
int main (void) {
  void *handle = dlopen ("`pwd`/$libname$libltdl_cv_shlibext", RTLD_GLOBAL|RTLD_NOW);
  int status = $libltdl_dlunknown;
  if (handle) {
    if (dlsym (handle, "fnord"))
      status = $libltdl_dlnouscore;
    else {
      if (dlsym (handle, "_fnord"))
        status = $libltdl_dluscore;
      else
	puts (dlerror ());
    }
    dlclose (handle);
  } else
    puts (dlerror ());
  return status;
}]
_LT_EOF
      if AC_TRY_EVAL(ac_link) && test -s "conftest$ac_exeext" 2>/dev/null; then
        (./conftest; exit; ) >&AS_MESSAGE_LOG_FD 2>/dev/null
        libltdl_status=$?
        case x$libltdl_status in
          x$libltdl_dlnouscore) libltdl_cv_need_uscore=no ;;
	  x$libltdl_dluscore) libltdl_cv_need_uscore=yes ;;
	  x*) libltdl_cv_need_uscore=unknown ;;
        esac
      fi
      rm -rf conftest* $libname*
      LIBS=$dlsym_uscore_save_LIBS
    ])
  fi
fi

if test yes = "$libltdl_cv_need_uscore"; then
  AC_DEFINE([NEED_USCORE], [1],
    [Define if dlsym() requires a leading underscore in symbol names.])
fi
])
m4trace:/opt/homebrew/share/aclocal/ltdl.m4:909: -1- AU_DEFUN([AC_LTDL_DLSYM_USCORE], [m4_if($#, 0, [LT_FUNC_DLSYM_USCORE], [LT_FUNC_DLSYM_USCORE($@)])], [], [])
m4trace:/opt/homebrew/share/aclocal/ltdl.m4:909: -1- AC_DEFUN([AC_LTDL_DLSYM_USCORE], [m4_warn([obsolete], [The macro 'AC_LTDL_DLSYM_USCORE' is obsolete.
You should run autoupdate.])dnl
m4_if($#, 0, [LT_FUNC_DLSYM_USCORE], [LT_FUNC_DLSYM_USCORE($@)])])
m4trace:/opt/homebrew/share/aclocal/pkg.m4:62: -1- AC_DEFUN([PKG_PROG_PKG_CONFIG], [m4_pattern_forbid([^_?PKG_[A-Z_]+$])
m4_pattern_allow([^PKG_CONFIG(_(PATH|LIBDIR|SYSROOT_DIR|ALLOW_SYSTEM_(CFLAGS|LIBS)))?$])
m4_pattern_allow([^PKG_CONFIG_(DISABLE_UNINSTALLED|TOP_BUILD_DIR|DEBUG_SPEW)$])
AC_ARG_VAR([PKG_CONFIG], [path to pkg-config utility])
AC_ARG_VAR([PKG_CONFIG_PATH], [directories to add to pkg-config's search path])
AC_ARG_VAR([PKG_CONFIG_LIBDIR], [path overriding pkg-config's built-in search path])

if test "x$ac_cv_env_PKG_CONFIG_set" != "xset"; then
	AC_PATH_TOOL([PKG_CONFIG], [pkg-config])
fi
if test -n "$PKG_CONFIG"; then
	_pkg_min_version=m4_default([$1], [0.9.0])
	AC_MSG_CHECKING([pkg-config is at least version $_pkg_min_version])
	if $PKG_CONFIG --atleast-pkgconfig-version $_pkg_min_version; then
		AC_MSG_RESULT([yes])
	else
		AC_MSG_RESULT([no])
		PKG_CONFIG=""
	fi
fi
if test -z "$PKG_CONFIG"; then
	m4_default([$2], [AC_MSG_ERROR([pkg-config not found])])
fi[]dnl
])
m4trace:/opt/homebrew/share/aclocal/pkg.m4:99: -1- AC_DEFUN([PKG_CHECK_EXISTS], [AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl
if test -n "$PKG_CONFIG" && \
    AC_RUN_LOG([$PKG_CONFIG --exists --print-errors "$1"]); then
  m4_default([$2], [:])
m4_ifvaln([$3], [else
  $3])dnl
fi])
m4trace:/opt/homebrew/share/aclocal/pkg.m4:128: -1- AC_DEFUN([_PKG_SHORT_ERRORS_SUPPORTED], [AC_REQUIRE([PKG_PROG_PKG_CONFIG])
if $PKG_CONFIG --atleast-pkgconfig-version 0.20; then
        _pkg_short_errors_supported=yes
else
        _pkg_short_errors_supported=no
fi[]dnl
])
m4trace:/opt/homebrew/share/aclocal/pkg.m4:146: -1- AC_DEFUN([PKG_CHECK_MODULES], [AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl
AC_ARG_VAR([$1][_CFLAGS], [C compiler flags for $1, overriding pkg-config])dnl
AC_ARG_VAR([$1][_LIBS], [linker flags for $1, overriding pkg-config])dnl

pkg_failed=no
AC_MSG_CHECKING([for $2])

_PKG_CONFIG([$1][_CFLAGS], [cflags], [$2])
_PKG_CONFIG([$1][_LIBS], [libs], [$2])

m4_define([_PKG_TEXT], [Alternatively, you may set the environment variables $1[]_CFLAGS
and $1[]_LIBS to avoid the need to call pkg-config.
See the pkg-config man page for more details.])

if test $pkg_failed = yes; then
        AC_MSG_RESULT([no])
        _PKG_SHORT_ERRORS_SUPPORTED
        if test $_pkg_short_errors_supported = yes; then
                $1[]_PKG_ERRORS=`$PKG_CONFIG --short-errors --print-errors --cflags --libs "$2" 2>&1`
        else
                $1[]_PKG_ERRORS=`$PKG_CONFIG --print-errors --cflags --libs "$2" 2>&1`
        fi
        # Put the nasty error message in config.log where it belongs
        echo "$$1[]_PKG_ERRORS" >&AS_MESSAGE_LOG_FD

        m4_default([$4], [AC_MSG_ERROR(
[Package requirements ($2) were not met:

$$1_PKG_ERRORS

Consider adjusting the PKG_CONFIG_PATH environment variable if you
installed software in a non-standard prefix.

_PKG_TEXT])[]dnl
        ])
elif test $pkg_failed = untried; then
        AC_MSG_RESULT([no])
        m4_default([$4], [AC_MSG_FAILURE(
[The pkg-config script could not be found or is too old.  Make sure it
is in your PATH or set the PKG_CONFIG environment variable to the full
path to pkg-config.

_PKG_TEXT

To get pkg-config, see <http://pkg-config.freedesktop.org/>.])[]dnl
        ])
else
        $1[]_CFLAGS=$pkg_cv_[]$1[]_CFLAGS
        $1[]_LIBS=$pkg_cv_[]$1[]_LIBS
        AC_MSG_RESULT([yes])
        $3
fi[]dnl
])
m4trace:/opt/homebrew/share/aclocal/pkg.m4:215: -1- AC_DEFUN([PKG_CHECK_MODULES_STATIC], [AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl
_save_PKG_CONFIG=$PKG_CONFIG
PKG_CONFIG="$PKG_CONFIG --static"
PKG_CHECK_MODULES($@)
PKG_CONFIG=$_save_PKG_CONFIG[]dnl
])
m4trace:/opt/homebrew/share/aclocal/pkg.m4:233: -1- AC_DEFUN([PKG_INSTALLDIR], [m4_pushdef([pkg_default], [m4_default([$1], ['${libdir}/pkgconfig'])])
m4_pushdef([pkg_description],
    [pkg-config installation directory @<:@]pkg_default[@:>@])
AC_ARG_WITH([pkgconfigdir],
    [AS_HELP_STRING([--with-pkgconfigdir], pkg_description)],,
    [with_pkgconfigdir=]pkg_default)
AC_SUBST([pkgconfigdir], [$with_pkgconfigdir])
m4_popdef([pkg_default])
m4_popdef([pkg_description])
])
m4trace:/opt/homebrew/share/aclocal/pkg.m4:255: -1- AC_DEFUN([PKG_NOARCH_INSTALLDIR], [m4_pushdef([pkg_default], [m4_default([$1], ['${datadir}/pkgconfig'])])
m4_pushdef([pkg_description],
    [pkg-config arch-independent installation directory @<:@]pkg_default[@:>@])
AC_ARG_WITH([noarch-pkgconfigdir],
    [AS_HELP_STRING([--with-noarch-pkgconfigdir], pkg_description)],,
    [with_noarch_pkgconfigdir=]pkg_default)
AC_SUBST([noarch_pkgconfigdir], [$with_noarch_pkgconfigdir])
m4_popdef([pkg_default])
m4_popdef([pkg_description])
])
m4trace:/opt/homebrew/share/aclocal/pkg.m4:274: -1- AC_DEFUN([PKG_CHECK_VAR], [AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl
AC_ARG_VAR([$1], [value of $3 for $2, overriding pkg-config])dnl

_PKG_CONFIG([$1], [variable="][$3]["], [$2])
AS_VAR_COPY([$1], [pkg_cv_][$1])

AS_VAR_IF([$1], [""], [$5], [$4])dnl
])
m4trace:/opt/homebrew/share/aclocal/pkg.m4:292: -1- AC_DEFUN([PKG_WITH_MODULES], [
m4_pushdef([with_arg], m4_tolower([$1]))

m4_pushdef([description],
           [m4_default([$5], [build with ]with_arg[ support])])

m4_pushdef([def_arg], [m4_default([$6], [auto])])
m4_pushdef([def_action_if_found], [AS_TR_SH([with_]with_arg)=yes])
m4_pushdef([def_action_if_not_found], [AS_TR_SH([with_]with_arg)=no])

m4_case(def_arg,
            [yes],[m4_pushdef([with_without], [--without-]with_arg)],
            [m4_pushdef([with_without],[--with-]with_arg)])

AC_ARG_WITH(with_arg,
     AS_HELP_STRING(with_without, description[ @<:@default=]def_arg[@:>@]),,
    [AS_TR_SH([with_]with_arg)=def_arg])

AS_CASE([$AS_TR_SH([with_]with_arg)],
            [yes],[PKG_CHECK_MODULES([$1],[$2],$3,$4)],
            [auto],[PKG_CHECK_MODULES([$1],[$2],
                                        [m4_n([def_action_if_found]) $3],
                                        [m4_n([def_action_if_not_found]) $4])])

m4_popdef([with_arg])
m4_popdef([description])
m4_popdef([def_arg])

])
m4trace:/opt/homebrew/share/aclocal/pkg.m4:329: -1- AC_DEFUN([PKG_HAVE_WITH_MODULES], [
PKG_WITH_MODULES([$1],[$2],,,[$3],[$4])

AM_CONDITIONAL([HAVE_][$1],
               [test "$AS_TR_SH([with_]m4_tolower([$1]))" = "yes"])
])
m4trace:/opt/homebrew/share/aclocal/pkg.m4:344: -1- AC_DEFUN([PKG_HAVE_DEFINE_WITH_MODULES], [
PKG_HAVE_WITH_MODULES([$1],[$2],[$3],[$4])

AS_IF([test "$AS_TR_SH([with_]m4_tolower([$1]))" = "yes"],
        [AC_DEFINE([HAVE_][$1], 1, [Enable ]m4_tolower([$1])[ support])])
])
m4trace:/opt/homebrew/Cellar/automake/1.18.1/share/aclocal-1.18/amversion.m4:14: -1- AC_DEFUN([AM_AUTOMAKE_VERSION], [am__api_version='1.18'
dnl Some users find AM_AUTOMAKE_VERSION and mistake it for a way to
dnl require some minimum version.  Point them to the right macro.
m4_if([$1], [1.18.1], [],
      [AC_FATAL([Do not call $0, use AM_INIT_AUTOMAKE([$1]).])])dnl
])
m4trace:/opt/homebrew/Cellar/automake/1.18.1/share/aclocal-1.18/amversion.m4:33: -1- AC_DEFUN([AM_SET_CURRENT_AUTOMAKE_VERSION], [AM_AUTOMAKE_VERSION([1.18.1])dnl
m4_ifndef([AC_AUTOCONF_VERSION],
  [m4_copy([m4_PACKAGE_VERSION], [AC_AUTOCONF_VERSION])])dnl
_AM_AUTOCONF_VERSION(m4_defn([AC_AUTOCONF_VERSION]))])
m4trace:/opt/homebrew/Cellar/automake/1.18.1/share/aclocal-1.18/ar-lib.m4:13: -1- AC_DEFUN([AM_PROG_AR], [AC_BEFORE([$0], [LT_INIT])dnl
AC_BEFORE([$0], [AC_PROG_LIBTOOL])dnl
AC_BEFORE([$0], [AC_PROG_AR])dnl
AC_REQUIRE([AM_AUX_DIR_EXPAND])dnl
AC_REQUIRE_AUX_FILE([ar-lib])dnl
AC_CHECK_TOOLS([AR], [ar lib "link -lib"], [false])
: ${AR=ar}
: ${ARFLAGS=cr}

AC_CACHE_CHECK([the archiver ($AR) interface], [am_cv_ar_interface],
  [AC_LANG_PUSH([C])
   am_cv_ar_interface=ar
   AC_COMPILE_IFELSE([AC_LANG_SOURCE([[int some_variable = 0;]])],
     [am_ar_try='$AR $ARFLAGS libconftest.a conftest.$ac_objext >&AS_MESSAGE_LOG_FD'
      AC_TRY_EVAL([am_ar_try])
      if test "$ac_status" -eq 0; then
        am_cv_ar_interface=ar
      else
        am_ar_try='$AR -NOLOGO -OUT:conftest.lib conftest.$ac_objext >&AS_MESSAGE_LOG_FD'
        AC_TRY_EVAL([am_ar_try])
        if test "$ac_status" -eq 0; then
          am_cv_ar_interface=lib
        else
          am_cv_ar_interface=unknown
        fi
      fi
      rm -f conftest.lib libconftest.a
     ])
   AC_LANG_POP([C])])

case $am_cv_ar_interface in
ar)
  ;;
lib)
  # Microsoft lib, so override with the ar-lib wrapper script.
  # FIXME: It is wrong to rewrite AR.
  # But if we don't then we get into trouble of one sort or another.
  # A longer-term fix would be to have automake use am__AR in this case,
  # and then we could set am__AR="$am_aux_dir/ar-lib \$(AR)" or something
  # similar.
  AR="$am_aux_dir/ar-lib $AR"
  ;;
unknown)
  m4_default([$1],
             [AC_MSG_ERROR([could not determine $AR interface])])
  ;;
esac
AC_SUBST([AR])dnl
])
m4trace:/opt/homebrew/Cellar/automake/1.18.1/share/aclocal-1.18/auxdir.m4:47: -1- AC_DEFUN([AM_AUX_DIR_EXPAND], [AC_REQUIRE([AC_CONFIG_AUX_DIR_DEFAULT])dnl
# Expand $ac_aux_dir to an absolute path.
am_aux_dir=`cd "$ac_aux_dir" && pwd`
])
m4trace:/opt/homebrew/Cellar/automake/1.18.1/share/aclocal-1.18/cond.m4:12: -1- AC_DEFUN([AM_CONDITIONAL], [AC_PREREQ([2.52])dnl
 m4_if([$1], [TRUE],  [AC_FATAL([$0: invalid condition: $1])],
       [$1], [FALSE], [AC_FATAL([$0: invalid condition: $1])])dnl
AC_SUBST([$1_TRUE])dnl
AC_SUBST([$1_FALSE])dnl
_AM_SUBST_NOTMAKE([$1_TRUE])dnl
_AM_SUBST_NOTMAKE([$1_FALSE])dnl
m4_define([_AM_COND_VALUE_$1], [$2])dnl
if $2; then
  $1_TRUE=
  $1_FALSE='#'
else
  $1_TRUE='#'
  $1_FALSE=
fi
AC_CONFIG_COMMANDS_PRE(
[if test -z "${$1_TRUE}" && test -z "${$1_FALSE}"; then
  AC_MSG_ERROR([[conditional "$1" was never defined.
Usually this means the macro was only invoked conditionally.]])
fi])])
m4trace:/opt/homebrew/Cellar/automake/1.18.1/share/aclocal-1.18/depend.m4:26: -1- AC_DEFUN([_AM_DEPENDENCIES], [AC_REQUIRE([AM_SET_DEPDIR])dnl
AC_REQUIRE([AM_OUTPUT_DEPENDENCY_COMMANDS])dnl
AC_REQUIRE([AM_MAKE_INCLUDE])dnl
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m4trace:/opt/homebrew/Cellar/automake/1.18.1/share/aclocal-1.18/depend.m4:163: -1- AC_DEFUN([AM_SET_DEPDIR], [AC_REQUIRE([AM_SET_LEADING_DOT])dnl
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m4trace:/opt/homebrew/Cellar/automake/1.18.1/share/aclocal-1.18/depend.m4:171: -1- AC_DEFUN([AM_DEP_TRACK], [AC_ARG_ENABLE([dependency-tracking], [dnl
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AM_MISSING_PROG([AUTOHEADER], [autoheader])
AM_MISSING_PROG([MAKEINFO], [makeinfo])
AC_REQUIRE([AM_PROG_INSTALL_SH])dnl
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m4trace:/opt/homebrew/Cellar/automake/1.18.1/share/aclocal-1.18/init.m4:167: -1- AC_DEFUN([_AC_AM_CONFIG_HEADER_HOOK], [# Compute $1's index in $config_headers.
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AC_SUBST([install_sh])])
m4trace:/opt/homebrew/Cellar/automake/1.18.1/share/aclocal-1.18/lead-dot.m4:10: -1- AC_DEFUN([AM_SET_LEADING_DOT], [rm -rf .tst 2>/dev/null
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m4trace:/opt/homebrew/Cellar/automake/1.18.1/share/aclocal-1.18/make.m4:42: -1- m4_pattern_allow([^am__quote$])
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   ($1) >&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD
   ac_status=$?
   echo "$as_me:$LINENO: \$? = $ac_status" >&AS_MESSAGE_LOG_FD
   (exit $ac_status); }])
m4trace:/opt/homebrew/Cellar/automake/1.18.1/share/aclocal-1.18/sanity.m4:11: -1- AC_DEFUN([_AM_SLEEP_FRACTIONAL_SECONDS], [dnl
AC_CACHE_CHECK([whether sleep supports fractional seconds],
               am_cv_sleep_fractional_seconds, [dnl
AS_IF([sleep 0.001 2>/dev/null], [am_cv_sleep_fractional_seconds=yes],
                                 [am_cv_sleep_fractional_seconds=no])
])])
m4trace:/opt/homebrew/Cellar/automake/1.18.1/share/aclocal-1.18/sanity.m4:28: -1- AC_DEFUN([_AM_FILESYSTEM_TIMESTAMP_RESOLUTION], [dnl
AC_REQUIRE([_AM_SLEEP_FRACTIONAL_SECONDS])
AC_CACHE_CHECK([filesystem timestamp resolution],
               am_cv_filesystem_timestamp_resolution, [dnl
# Default to the worst case.
am_cv_filesystem_timestamp_resolution=2

# Only try to go finer than 1 sec if sleep can do it.
# Don't try 1 sec, because if 0.01 sec and 0.1 sec don't work,
# - 1 sec is not much of a win compared to 2 sec, and
# - it takes 2 seconds to perform the test whether 1 sec works.
# 
# Instead, just use the default 2s on platforms that have 1s resolution,
# accept the extra 1s delay when using $sleep in the Automake tests, in
# exchange for not incurring the 2s delay for running the test for all
# packages.
#
am_try_resolutions=
if test "$am_cv_sleep_fractional_seconds" = yes; then
  # Even a millisecond often causes a bunch of false positives,
  # so just try a hundredth of a second. The time saved between .001 and
  # .01 is not terribly consequential.
  am_try_resolutions="0.01 0.1 $am_try_resolutions"
fi

# In order to catch current-generation FAT out, we must *modify* files
# that already exist; the *creation* timestamp is finer.  Use names
# that make ls -t sort them differently when they have equal
# timestamps than when they have distinct timestamps, keeping
# in mind that ls -t prints the *newest* file first.
rm -f conftest.ts?
: > conftest.ts1
: > conftest.ts2
: > conftest.ts3

# Make sure ls -t actually works.  Do 'set' in a subshell so we don't
# clobber the current shell's arguments. (Outer-level square brackets
# are removed by m4; they're present so that m4 does not expand
# <dollar><star>; be careful, easy to get confused.)
if (
     set X `[ls -t conftest.ts[12]]` &&
     {
       test "$[]*" != "X conftest.ts1 conftest.ts2" ||
       test "$[]*" != "X conftest.ts2 conftest.ts1";
     }
); then :; else
  # If neither matched, then we have a broken ls.  This can happen
  # if, for instance, CONFIG_SHELL is bash and it inherits a
  # broken ls alias from the environment.  This has actually
  # happened.  Such a system could not be considered "sane".
  _AS_ECHO_UNQUOTED(
    ["Bad output from ls -t: \"`[ls -t conftest.ts[12]]`\""],
    [AS_MESSAGE_LOG_FD])
  AC_MSG_FAILURE([ls -t produces unexpected output.
Make sure there is not a broken ls alias in your environment.])
fi

for am_try_res in $am_try_resolutions; do
  # Any one fine-grained sleep might happen to cross the boundary
  # between two values of a coarser actual resolution, but if we do
  # two fine-grained sleeps in a row, at least one of them will fall
  # entirely within a coarse interval.
  echo alpha > conftest.ts1
  sleep $am_try_res
  echo beta > conftest.ts2
  sleep $am_try_res
  echo gamma > conftest.ts3

  # We assume that 'ls -t' will make use of high-resolution
  # timestamps if the operating system supports them at all.
  if (set X `ls -t conftest.ts?` &&
      test "$[]2" = conftest.ts3 &&
      test "$[]3" = conftest.ts2 &&
      test "$[]4" = conftest.ts1); then
    #
    # Ok, ls -t worked. If we're at a resolution of 1 second, we're done,
    # because we don't need to test make.
    make_ok=true
    if test $am_try_res != 1; then
      # But if we've succeeded so far with a subsecond resolution, we
      # have one more thing to check: make. It can happen that
      # everything else supports the subsecond mtimes, but make doesn't;
      # notably on macOS, which ships make 3.81 from 2006 (the last one
      # released under GPLv2). https://bugs.gnu.org/68808
      # 
      # We test $MAKE if it is defined in the environment, else "make".
      # It might get overridden later, but our hope is that in practice
      # it does not matter: it is the system "make" which is (by far)
      # the most likely to be broken, whereas if the user overrides it,
      # probably they did so with a better, or at least not worse, make.
      # https://lists.gnu.org/archive/html/automake/2024-06/msg00051.html
      #
      # Create a Makefile (real tab character here):
      rm -f conftest.mk
      echo 'conftest.ts1: conftest.ts2' >conftest.mk
      echo '	touch conftest.ts2' >>conftest.mk
      #
      # Now, running
      #   touch conftest.ts1; touch conftest.ts2; make
      # should touch ts1 because ts2 is newer. This could happen by luck,
      # but most often, it will fail if make's support is insufficient. So
      # test for several consecutive successes.
      #
      # (We reuse conftest.ts[12] because we still want to modify existing
      # files, not create new ones, per above.)
      n=0
      make=${MAKE-make}
      until test $n -eq 3; do
        echo one > conftest.ts1
        sleep $am_try_res
        echo two > conftest.ts2 # ts2 should now be newer than ts1
        if $make -f conftest.mk | grep 'up to date' >/dev/null; then
          make_ok=false
          break # out of $n loop
        fi
        n=`expr $n + 1`
      done
    fi
    #
    if $make_ok; then
      # Everything we know to check worked out, so call this resolution good.
      am_cv_filesystem_timestamp_resolution=$am_try_res
      break # out of $am_try_res loop
    fi
    # Otherwise, we'll go on to check the next resolution.
  fi
done
rm -f conftest.ts?
# (end _am_filesystem_timestamp_resolution)
])])
m4trace:/opt/homebrew/Cellar/automake/1.18.1/share/aclocal-1.18/sanity.m4:161: -1- AC_DEFUN([AM_SANITY_CHECK], [AC_REQUIRE([_AM_FILESYSTEM_TIMESTAMP_RESOLUTION])
# This check should not be cached, as it may vary across builds of
# different projects.
AC_MSG_CHECKING([whether build environment is sane])
# Reject unsafe characters in $srcdir or the absolute working directory
# name.  Accept space and tab only in the latter.
am_lf='
'
case `pwd` in
  *[[\\\"\#\$\&\'\`$am_lf]]*)
    AC_MSG_RESULT([no])
    AC_MSG_ERROR([unsafe absolute working directory name]);;
esac
case $srcdir in
  *[[\\\"\#\$\&\'\`$am_lf\ \	]]*)
    AC_MSG_RESULT([no])
    AC_MSG_ERROR([unsafe srcdir value: '$srcdir']);;
esac

# Do 'set' in a subshell so we don't clobber the current shell's
# arguments.  Must try -L first in case configure is actually a
# symlink; some systems play weird games with the mod time of symlinks
# (eg FreeBSD returns the mod time of the symlink's containing
# directory).
am_build_env_is_sane=no
am_has_slept=no
rm -f conftest.file
for am_try in 1 2; do
  echo "timestamp, slept: $am_has_slept" > conftest.file
  if (
    set X `ls -Lt "$srcdir/configure" conftest.file 2> /dev/null`
    if test "$[]*" = "X"; then
      # -L didn't work.
      set X `ls -t "$srcdir/configure" conftest.file`
    fi
    test "$[]2" = conftest.file
  ); then
    am_build_env_is_sane=yes
    break
  fi
  # Just in case.
  sleep "$am_cv_filesystem_timestamp_resolution"
  am_has_slept=yes
done

AC_MSG_RESULT([$am_build_env_is_sane])
if test "$am_build_env_is_sane" = no; then
  AC_MSG_ERROR([newly created file is older than distributed files!
Check your system clock])
fi

# If we didn't sleep, we still need to ensure time stamps of config.status and
# generated files are strictly newer.
am_sleep_pid=
AS_IF([test -e conftest.file || grep 'slept: no' conftest.file >/dev/null 2>&1],, [dnl
  ( sleep "$am_cv_filesystem_timestamp_resolution" ) &
  am_sleep_pid=$!
])
AC_CONFIG_COMMANDS_PRE(
  [AC_MSG_CHECKING([that generated files are newer than configure])
   if test -n "$am_sleep_pid"; then
     # Hide warnings about reused PIDs.
     wait $am_sleep_pid 2>/dev/null
   fi
   AC_MSG_RESULT([done])])
rm -f conftest.file
])
m4trace:/opt/homebrew/Cellar/automake/1.18.1/share/aclocal-1.18/silent.m4:11: -1- AC_DEFUN([_AM_SILENT_RULES], [AM_DEFAULT_VERBOSITY=1
AC_ARG_ENABLE([silent-rules], [dnl
AS_HELP_STRING(
  [--enable-silent-rules],
  [less verbose build output (undo: "make V=1")])
AS_HELP_STRING(
  [--disable-silent-rules],
  [verbose build output (undo: "make V=0")])dnl
])
dnl
dnl A few 'make' implementations (e.g., NonStop OS and NextStep)
dnl do not support nested variable expansions.
dnl See automake bug#9928 and bug#10237.
am_make=${MAKE-make}
AC_CACHE_CHECK([whether $am_make supports nested variables],
   [am_cv_make_support_nested_variables],
   [if AS_ECHO([['TRUE=$(BAR$(V))
BAR0=false
BAR1=true
V=1
am__doit:
	@$(TRUE)
.PHONY: am__doit']]) | $am_make -f - >/dev/null 2>&1; then
  am_cv_make_support_nested_variables=yes
else
  am_cv_make_support_nested_variables=no
fi])
AC_SUBST([AM_V])dnl
AM_SUBST_NOTMAKE([AM_V])dnl
AC_SUBST([AM_DEFAULT_V])dnl
AM_SUBST_NOTMAKE([AM_DEFAULT_V])dnl
AC_SUBST([AM_DEFAULT_VERBOSITY])dnl
AM_BACKSLASH='\'
AC_SUBST([AM_BACKSLASH])dnl
_AM_SUBST_NOTMAKE([AM_BACKSLASH])dnl
dnl Delay evaluation of AM_DEFAULT_VERBOSITY to the end to allow multiple calls
dnl to AM_SILENT_RULES to change the default value.
AC_CONFIG_COMMANDS_PRE([dnl
case $enable_silent_rules in @%:@ (((
  yes) AM_DEFAULT_VERBOSITY=0;;
   no) AM_DEFAULT_VERBOSITY=1;;
esac
if test $am_cv_make_support_nested_variables = yes; then
  dnl Using '$V' instead of '$(V)' breaks IRIX make.
  AM_V='$(V)'
  AM_DEFAULT_V='$(AM_DEFAULT_VERBOSITY)'
else
  AM_V=$AM_DEFAULT_VERBOSITY
  AM_DEFAULT_V=$AM_DEFAULT_VERBOSITY
fi
])dnl
])
m4trace:/opt/homebrew/Cellar/automake/1.18.1/share/aclocal-1.18/silent.m4:69: -1- AC_DEFUN([AM_SILENT_RULES], [AC_REQUIRE([_AM_SILENT_RULES])
AM_DEFAULT_VERBOSITY=m4_if([$1], [yes], [0], [1])m4_newline
dnl We intentionally force a newline after the assignment, since a) nothing
dnl good can come of more text following, and b) that was the behavior
dnl before 1.17. See https://bugs.gnu.org/72267.
])
m4trace:/opt/homebrew/Cellar/automake/1.18.1/share/aclocal-1.18/strip.m4:17: -1- AC_DEFUN([AM_PROG_INSTALL_STRIP], [AC_REQUIRE([AM_PROG_INSTALL_SH])dnl
# Installed binaries are usually stripped using 'strip' when the user
# run "make install-strip".  However 'strip' might not be the right
# tool to use in cross-compilation environments, therefore Automake
# will honor the 'STRIP' environment variable to overrule this program.
dnl Don't test for $cross_compiling = yes, because it might be 'maybe'.
if test "$cross_compiling" != no; then
  AC_CHECK_TOOL([STRIP], [strip], :)
fi
INSTALL_STRIP_PROGRAM="\$(install_sh) -c -s"
AC_SUBST([INSTALL_STRIP_PROGRAM])])
m4trace:/opt/homebrew/Cellar/automake/1.18.1/share/aclocal-1.18/substnot.m4:12: -1- AC_DEFUN([_AM_SUBST_NOTMAKE])
m4trace:/opt/homebrew/Cellar/automake/1.18.1/share/aclocal-1.18/substnot.m4:17: -1- AC_DEFUN([AM_SUBST_NOTMAKE], [_AM_SUBST_NOTMAKE($@)])
m4trace:/opt/homebrew/Cellar/automake/1.18.1/share/aclocal-1.18/tar.m4:23: -1- AC_DEFUN([_AM_PROG_TAR], [# Always define AMTAR for backward compatibility.  Yes, it's still used
# in the wild :-(  We should find a proper way to deprecate it ...
AC_SUBST([AMTAR], ['$${TAR-tar}'])

# We'll loop over all known methods to create a tar archive until one works.
_am_tools='gnutar m4_if([$1], [ustar], [plaintar]) pax cpio none'

m4_if([$1], [v7],
  [am__tar='$${TAR-tar} chof - "$$tardir"' am__untar='$${TAR-tar} xf -'],

  [m4_case([$1],
    [ustar],
     [# The POSIX 1988 'ustar' format is defined with fixed-size fields.
      # There is notably a 21 bits limit for the UID and the GID.  In fact,
      # the 'pax' utility can hang on bigger UID/GID (see automake bug#8343
      # and bug#13588).
      am_max_uid=2097151 # 2^21 - 1
      am_max_gid=$am_max_uid
      # The $UID and $GID variables are not portable, so we need to resort
      # to the POSIX-mandated id(1) utility.  Errors in the 'id' calls
      # below are definitely unexpected, so allow the users to see them
      # (that is, avoid stderr redirection).
      am_uid=`id -u || echo unknown`
      am_gid=`id -g || echo unknown`
      AC_MSG_CHECKING([whether UID '$am_uid' is supported by ustar format])
      if test x$am_uid = xunknown; then
        AC_MSG_WARN([ancient id detected; assuming current UID is ok, but dist-ustar might not work])
      elif test $am_uid -le $am_max_uid; then
        AC_MSG_RESULT([yes])
      else
        AC_MSG_RESULT([no])
        _am_tools=none
      fi
      AC_MSG_CHECKING([whether GID '$am_gid' is supported by ustar format])
      if test x$gm_gid = xunknown; then
        AC_MSG_WARN([ancient id detected; assuming current GID is ok, but dist-ustar might not work])
      elif test $am_gid -le $am_max_gid; then
        AC_MSG_RESULT([yes])
      else
        AC_MSG_RESULT([no])
        _am_tools=none
      fi],

  [pax],
    [],

  [m4_fatal([Unknown tar format])])

  AC_MSG_CHECKING([how to create a $1 tar archive])

  # Go ahead even if we have the value already cached.  We do so because we
  # need to set the values for the 'am__tar' and 'am__untar' variables.
  _am_tools=${am_cv_prog_tar_$1-$_am_tools}

  for _am_tool in $_am_tools; do
    case $_am_tool in
    gnutar)
      for _am_tar in tar gnutar gtar; do
        AM_RUN_LOG([$_am_tar --version]) && break
      done
      am__tar="$_am_tar --format=m4_if([$1], [pax], [posix], [$1]) -chf - "'"$$tardir"'
      am__tar_="$_am_tar --format=m4_if([$1], [pax], [posix], [$1]) -chf - "'"$tardir"'
      am__untar="$_am_tar -xf -"
      ;;
    plaintar)
      # Must skip GNU tar: if it does not support --format= it doesn't create
      # ustar tarball either.
      (tar --version) >/dev/null 2>&1 && continue
      am__tar='tar chf - "$$tardir"'
      am__tar_='tar chf - "$tardir"'
      am__untar='tar xf -'
      ;;
    pax)
      am__tar='pax -L -x $1 -w "$$tardir"'
      am__tar_='pax -L -x $1 -w "$tardir"'
      am__untar='pax -r'
      ;;
    cpio)
      am__tar='find "$$tardir" -print | cpio -o -H $1 -L'
      am__tar_='find "$tardir" -print | cpio -o -H $1 -L'
      am__untar='cpio -i -H $1 -d'
      ;;
    none)
      am__tar=false
      am__tar_=false
      am__untar=false
      ;;
    esac

    # If the value was cached, stop now.  We just wanted to have am__tar
    # and am__untar set.
    test -n "${am_cv_prog_tar_$1}" && break

    # tar/untar a dummy directory, and stop if the command works.
    rm -rf conftest.dir
    mkdir conftest.dir
    echo GrepMe > conftest.dir/file
    AM_RUN_LOG([tardir=conftest.dir && eval $am__tar_ >conftest.tar])
    rm -rf conftest.dir
    if test -s conftest.tar; then
      AM_RUN_LOG([$am__untar <conftest.tar])
      AM_RUN_LOG([cat conftest.dir/file])
      grep GrepMe conftest.dir/file >/dev/null 2>&1 && break
    fi
  done
  rm -rf conftest.dir

  AC_CACHE_VAL([am_cv_prog_tar_$1], [am_cv_prog_tar_$1=$_am_tool])
  AC_MSG_RESULT([$am_cv_prog_tar_$1])])

AC_SUBST([am__tar])
AC_SUBST([am__untar])
])
m4trace:/opt/homebrew/Cellar/automake/1.18.1/share/aclocal-1.18/xargsn.m4:12: -1- AC_DEFUN([_AM_PROG_XARGS_N], [AC_CACHE_CHECK([xargs -n works], am_cv_xargs_n_works, [dnl
AS_IF([test "`echo 1 2 3 | xargs -n2 echo`" = "1 2
3"], [am_cv_xargs_n_works=yes], [am_cv_xargs_n_works=no])])
AS_IF([test "$am_cv_xargs_n_works" = yes], [am__xargs_n='xargs -n'], [dnl
  am__xargs_n='am__xargs_n () { shift; sed "s/ /\\n/g" | while read am__xargs_n_arg; do "$@" "$am__xargs_n_arg"; done; }'
])dnl
AC_SUBST(am__xargs_n)
])
m4trace:m4/ax_check_eigen.m4:3: -1- AC_DEFUN([AX_CHECK_EIGEN], [
  AC_ARG_ENABLE(
    [eigen],
    [AS_HELP_STRING([--enable-eigen], [enable eigen (default: yes)])],
    [],
    [enable_eigen=yes]
  )
  AC_MSG_CHECKING([whether to enable eigen])
  AC_MSG_RESULT([$enable_eigen])
  
  dnl The following defines the LIBSEMIGROUPS_EIGEN_ENABLED preprocessor macro
  dnl (the LIBSEMIGROUPS_ prefix is added by another part of the build system)
  AS_IF([test "x$enable_eigen" = xyes],
        [AC_DEFINE([EIGEN_ENABLED], [1], [define if building with eigen])])
  
  if test "x$enable_eigen" = xyes; then
    AC_ARG_WITH(
      [external-eigen],
      [AS_HELP_STRING([--with-external-eigen], [use the external eigen (default: no)])],
      [], 
      [with_external_eigen=no]
    )
    AC_MSG_CHECKING([whether to use external eigen])
    AC_MSG_RESULT([$with_external_eigen])
   
    MIN_EIGEN_VERSION="3.3.7"
    eigen_PCDEP=""

    if test "x$with_external_eigen" = xyes;  then
          m4_ifdef([PKG_CHECK_MODULES], [
              PKG_CHECK_MODULES([EIGEN3], [eigen3 >= $MIN_EIGEN_VERSION])
              eigen_PCDEP="eigen3"
          ],
          [AC_MSG_ERROR([cannot use flag --with-external-eigen, the libsemigroups configure file was created on a system without m4 macros for pkg-config available...])])
    else
          AC_SUBST(EIGEN3_CFLAGS, ['-I$(srcdir)/extern/eigen-3.3.9/'])
    fi
    AC_SUBST([eigen_PCDEP])
  fi

  dnl The following makes LIBSEMIGROUPS_WITH_INTERNAL_EIGEN usable in Makefile.am
  AM_CONDITIONAL([LIBSEMIGROUPS_WITH_INTERNAL_EIGEN], [test "x$enable_eigen" = xyes && test "x$with_external_eigen" != xyes])
])
m4trace:m4/ax_check_fmt.m4:3: -1- AC_DEFUN([AX_CHECK_FMT], [
  AC_ARG_ENABLE(
    [fmt],
    [AS_HELP_STRING([--enable-fmt], [enable fmt (default: no)])],
    [],
    [enable_fmt=no]
  )
  AC_MSG_CHECKING([whether to enable fmt])
  AC_MSG_RESULT([$enable_fmt])

  dnl The following defines the LIBSEMIGROUPS_FMT_ENABLED preprocessor macro
  dnl (the LIBSEMIGROUPS_ prefix is added by another part of the build system)
  AS_IF([test "x$enable_fmt" = xyes], 
    [AC_DEFINE([FMT_ENABLED], [1], [define if building with fmt])])

  if test "x$enable_fmt" = xyes;  then
    AC_ARG_WITH(
      [external-fmt],
      [AS_HELP_STRING([--with-external-fmt], [use the external fmt (default: no)])],
      [],
      [with_external_fmt=no]
    )
    AC_MSG_CHECKING([whether to use external fmt])
    AC_MSG_RESULT([$with_external_fmt])

    MIN_FMT_VERSION="8.1.1"

    fmt_PCDEP=""
    if test "x$with_external_fmt" = xyes;  then
          m4_ifdef([PKG_CHECK_MODULES], [
              PKG_CHECK_MODULES([FMT], [fmt >= $MIN_FMT_VERSION])
              fmt_PCDEP="fmt"
          ],
          [AC_MSG_ERROR([cannot use flag --with-external-fmt, the libsemigroups configure file was created on a system without m4 macros for pkg-config available...])])
    else
          AC_SUBST(FMT_CFLAGS, ['-I$(srcdir)/extern/fmt-8.1.1/include'])
    fi
    AC_SUBST([fmt_PCDEP])
  fi

  dnl The following makes LIBSEMIGROUPS_WITH_INTERNAL_FMT usable in Makefile.am
  AM_CONDITIONAL([LIBSEMIGROUPS_WITH_INTERNAL_FMT], [test "x$enable_fmt" = xyes && test "x$with_external_fmt" != xyes])
])
m4trace:m4/ax_check_hpcombi.m4:3: -1- AC_DEFUN([CHECK_INTRINSIC], [AC_MSG_CHECKING([for $1])
    saved_CXXFLAGS="$CXXFLAGS"
    CXXFLAGS="-mavx -flax-vector-conversions"
    AC_LINK_IFELSE(
      [AC_LANG_PROGRAM(
        [[#include <x86intrin.h>]],
        [$1[($2)];
        ]
        )],
      [],
      [enable_hpcombi=no]
      )
    AC_MSG_RESULT([$enable_hpcombi])
    CXXFLAGS="$saved_CXXFLAGS"
    ])
m4trace:m4/ax_check_hpcombi.m4:20: -1- AC_DEFUN([AX_CHECK_HPCOMBI], [
  m4_define([ax_hpcombi_cxxflags_variable],[HPCOMBI_CXXFLAGS])
  AC_ARG_ENABLE([hpcombi],
      [AS_HELP_STRING([--enable-hpcombi], [enable HPCombi])],
      [],
      [enable_hpcombi=yes]
      )
  AC_MSG_CHECKING([whether to enable HPCombi])
  AC_MSG_RESULT([$enable_hpcombi])

  AS_IF([test "x$enable_hpcombi" = xyes],
        [AC_CHECK_FILE([$srcdir/extern/HPCombi/VERSION], 
                       [], 
                       [AC_MSG_WARN([HPCombi is not available])
                       [enable_hpcombi=no]])])

  AS_IF([test "x$enable_hpcombi" = xyes],
        [AC_MSG_CHECKING([the required version of HPCombi])
         MIN_HPCOMBI_VERSION="0.0.6"
         AC_MSG_RESULT([$MIN_HPCOMBI_VERSION])])

  AS_IF([test "x$enable_hpcombi" = xyes],
        [AC_MSG_CHECKING([the version of HPCombi that's present])
         FOUND_HPCOMBI="$(cat $srcdir/extern/HPCombi/VERSION)"
         AC_MSG_RESULT([$FOUND_HPCOMBI])])

  AS_IF([test "x$enable_hpcombi" = xyes],
        [AX_COMPARE_VERSION($FOUND_HPCOMBI, 
                            [ge], 
                            $MIN_HPCOMBI_VERSION,
                            [],
                            [AC_MSG_WARN([the incorrect version of HPCombi is present, HPCombi is disabled]) 
                            enable_hpcombi=no])])
  
  dnl # Check if the flags required for HPCombi are supported 
  AS_IF([test "x$enable_hpcombi" = xyes], 
        [AX_CHECK_COMPILE_FLAG(-mavx, 
                               AX_APPEND_FLAG(-mavx, [ax_hpcombi_cxxflags_variable]),
                               [AC_MSG_WARN([flag -mavx not supported, HPCombi is disabled])
                              enable_hpcombi=no])])

  AS_IF([test "x$enable_hpcombi" = xyes], 
        [AX_CHECK_COMPILE_FLAG(-flax-vector-conversions, 
                               AX_APPEND_FLAG(-flax-vector-conversions, [ax_hpcombi_cxxflags_variable]),
                               [AC_MSG_WARN([flag -flax-vector-conversions not supported, HPCombi is disabled])
                               enable_hpcombi=no])])

  dnl # Check if the x86intrin.h header is available
  AS_IF([test "x$enable_hpcombi" = xyes], 
        [AC_CHECK_HEADERS([x86intrin.h], [], [AC_MSG_WARN([header x86intrin.h is required for HPCombi, HPCombi is disabled])
                               enable_hpcombi=no])])
  
  AS_IF([test "x$enable_hpcombi" = xyes], 
        [enable_hpcombi_before_builtin_check=yes])

  AS_IF([test "x$enable_hpcombi" = xyes], [CHECK_INTRINSIC([_mm_blendv_epi8],[__m128i{},__m128i{},__m128i{}])])
  AS_IF([test "x$enable_hpcombi" = xyes], [CHECK_INTRINSIC([_mm_cmpeq_epi8],[__m128i{},__m128i{}])])
  AS_IF([test "x$enable_hpcombi" = xyes], [CHECK_INTRINSIC([_mm_cmpestri],[__m128i{},1,__m128i{},1,1])])
  AS_IF([test "x$enable_hpcombi" = xyes], [CHECK_INTRINSIC([_mm_cmpestrm],[__m128i{},1,__m128i{},1,1])])
  AS_IF([test "x$enable_hpcombi" = xyes], [CHECK_INTRINSIC([_mm_cmplt_epi8],[__m128i{},__m128i{}])])
  AS_IF([test "x$enable_hpcombi" = xyes], [CHECK_INTRINSIC([_mm_extract_epi64],[__m128i{},1])])
  AS_IF([test "x$enable_hpcombi" = xyes], [CHECK_INTRINSIC([_mm_max_epi8],[__m128i{},__m128i{}])])
  AS_IF([test "x$enable_hpcombi" = xyes], [CHECK_INTRINSIC([_mm_max_epu8],[__m128i{},__m128i{}])])
  AS_IF([test "x$enable_hpcombi" = xyes], [CHECK_INTRINSIC([_mm_min_epi8],[__m128i{},__m128i{}])])
  AS_IF([test "x$enable_hpcombi" = xyes], [CHECK_INTRINSIC([_mm_min_epu8],[__m128i{},__m128i{}])])
  AS_IF([test "x$enable_hpcombi" = xyes], [CHECK_INTRINSIC([_mm_movemask_epi8],[__m128i{}])])
  AS_IF([test "x$enable_hpcombi" = xyes], [CHECK_INTRINSIC([_mm_popcnt_u32],[{}])])
  AS_IF([test "x$enable_hpcombi" = xyes], [CHECK_INTRINSIC([_mm_set_epi64x],[1,1])])
  AS_IF([test "x$enable_hpcombi" = xyes], [CHECK_INTRINSIC([_mm_shuffle_epi8],[__m128i{},__m128i{}])])
  AS_IF([test "x$enable_hpcombi" = xyes], [CHECK_INTRINSIC([_mm_slli_epi32],[__m128i{},1])])

  AS_IF([test "x$enable_hpcombi_before_builtin_check" = xyes],
        [AS_IF([test "x$enable_hpcombi" = xno],
         [AC_MSG_WARN([compiler builtin not supported, HPCombi is disabled])])])

  AS_IF([test "x$enable_hpcombi" = xyes],
        [AC_DEFINE([HPCOMBI_ENABLED], [1], [define if building with HPCombi])])

  dnl # the following is used in Makefile.am
  AM_CONDITIONAL([LIBSEMIGROUPS_HPCOMBI_ENABLED], [test "x$enable_hpcombi" = xyes])

  dnl # check for HPCombi's preprocessor macro
  AS_IF([test "x$enable_hpcombi" = xyes], 
  [AC_MSG_CHECKING([for HPCOMBI_CONSTEXPR_FUN_ARGS])
   AC_COMPILE_IFELSE( 
                    [AC_LANG_PROGRAM( 
                        [[using T = int; constexpr int exec(T f()) { return f(); }
                        constexpr int foo() { return 1; }
                        static_assert(exec(foo) == 1, "Failed exec");]]
                      )],
                     [hpcombi_constexpr_fun_args=yes],
                     [hpcombi_constexpr_fun_args=no]
                   )
   AC_MSG_RESULT([$hpcombi_constexpr_fun_args])])

  AM_CONDITIONAL([HPCOMBI_CONSTEXPR_FUN_ARGS], 
                 [test "x$hpcombi_constexpr_fun_args" = xyes])
    
  AS_IF([test "x$enable_hpcombi" = xyes],
        AC_SUBST(ax_hpcombi_cxxflags_variable))
])
m4trace:m4/ax_compare_version.m4:85: -1- AC_DEFUN([AX_COMPARE_VERSION], [
  AC_REQUIRE([AC_PROG_AWK])

  # Used to indicate true or false condition
  ax_compare_version=false

  # Convert the two version strings to be compared into a format that
  # allows a simple string comparison.  The end result is that a version
  # string of the form 1.12.5-r617 will be converted to the form
  # 0001001200050617.  In other words, each number is zero padded to four
  # digits, and non digits are removed.
  AS_VAR_PUSHDEF([A],[ax_compare_version_A])
  A=`echo "$1" | sed -e 's/\([[0-9]]*\)/Z\1Z/g' \
                     -e 's/Z\([[0-9]]\)Z/Z0\1Z/g' \
                     -e 's/Z\([[0-9]][[0-9]]\)Z/Z0\1Z/g' \
                     -e 's/Z\([[0-9]][[0-9]][[0-9]]\)Z/Z0\1Z/g' \
                     -e 's/[[^0-9]]//g'`

  AS_VAR_PUSHDEF([B],[ax_compare_version_B])
  B=`echo "$3" | sed -e 's/\([[0-9]]*\)/Z\1Z/g' \
                     -e 's/Z\([[0-9]]\)Z/Z0\1Z/g' \
                     -e 's/Z\([[0-9]][[0-9]]\)Z/Z0\1Z/g' \
                     -e 's/Z\([[0-9]][[0-9]][[0-9]]\)Z/Z0\1Z/g' \
                     -e 's/[[^0-9]]//g'`

  dnl # In the case of le, ge, lt, and gt, the strings are sorted as necessary
  dnl # then the first line is used to determine if the condition is true.
  dnl # The sed right after the echo is to remove any indented white space.
  m4_case(m4_tolower($2),
  [lt],[
    ax_compare_version=`echo "x$A
x$B" | sed 's/^ *//' | sort -r | sed "s/x${A}/false/;s/x${B}/true/;1q"`
  ],
  [gt],[
    ax_compare_version=`echo "x$A
x$B" | sed 's/^ *//' | sort | sed "s/x${A}/false/;s/x${B}/true/;1q"`
  ],
  [le],[
    ax_compare_version=`echo "x$A
x$B" | sed 's/^ *//' | sort | sed "s/x${A}/true/;s/x${B}/false/;1q"`
  ],
  [ge],[
    ax_compare_version=`echo "x$A
x$B" | sed 's/^ *//' | sort -r | sed "s/x${A}/true/;s/x${B}/false/;1q"`
  ],[
    dnl Split the operator from the subversion count if present.
    m4_bmatch(m4_substr($2,2),
    [0],[
      # A count of zero means use the length of the shorter version.
      # Determine the number of characters in A and B.
      ax_compare_version_len_A=`echo "$A" | $AWK '{print(length)}'`
      ax_compare_version_len_B=`echo "$B" | $AWK '{print(length)}'`

      # Set A to no more than B's length and B to no more than A's length.
      A=`echo "$A" | sed "s/\(.\{$ax_compare_version_len_B\}\).*/\1/"`
      B=`echo "$B" | sed "s/\(.\{$ax_compare_version_len_A\}\).*/\1/"`
    ],
    [[0-9]+],[
      # A count greater than zero means use only that many subversions
      A=`echo "$A" | sed "s/\(\([[0-9]]\{4\}\)\{m4_substr($2,2)\}\).*/\1/"`
      B=`echo "$B" | sed "s/\(\([[0-9]]\{4\}\)\{m4_substr($2,2)\}\).*/\1/"`
    ],
    [.+],[
      AC_WARNING(
        [invalid OP numeric parameter: $2])
    ],[])

    # Pad zeros at end of numbers to make same length.
    ax_compare_version_tmp_A="$A`echo $B | sed 's/./0/g'`"
    B="$B`echo $A | sed 's/./0/g'`"
    A="$ax_compare_version_tmp_A"

    # Check for equality or inequality as necessary.
    m4_case(m4_tolower(m4_substr($2,0,2)),
    [eq],[
      test "x$A" = "x$B" && ax_compare_version=true
    ],
    [ne],[
      test "x$A" != "x$B" && ax_compare_version=true
    ],[
      AC_WARNING([invalid OP parameter: $2])
    ])
  ])

  AS_VAR_POPDEF([A])dnl
  AS_VAR_POPDEF([B])dnl

  dnl # Execute ACTION-IF-TRUE / ACTION-IF-FALSE.
  if test "$ax_compare_version" = "true" ; then
    m4_ifvaln([$4],[$4],[:])dnl
    m4_ifvaln([$5],[else $5])dnl
  fi
])
m4trace:m4/ax_cxx_compile_stdcxx_14.m4:34: -1- AC_DEFUN([AX_CXX_COMPILE_STDCXX_14], [AX_CXX_COMPILE_STDCXX([14], [$1], [$2])])
m4trace:m4/ax_prefix_config_h.m4:119: -1- AC_DEFUN([AX_PREFIX_CONFIG_H], [dnl
AC_PREREQ([2.62])
AC_BEFORE([AC_CONFIG_HEADERS],[$0])dnl
AC_CONFIG_COMMANDS(m4_default([$1], [$PACKAGE-config.h]),[dnl
AS_VAR_PUSHDEF([_OUT],[ac_prefix_conf_OUT])dnl
AS_VAR_PUSHDEF([_DEF],[ac_prefix_conf_DEF])dnl
AS_VAR_PUSHDEF([_PKG],[ac_prefix_conf_PKG])dnl
AS_VAR_PUSHDEF([_LOW],[ac_prefix_conf_LOW])dnl
AS_VAR_PUSHDEF([_UPP],[ac_prefix_conf_UPP])dnl
AS_VAR_PUSHDEF([_INP],[ac_prefix_conf_INP])dnl
m4_pushdef([_script],[conftest.prefix])dnl
m4_pushdef([_symbol],[m4_cr_Letters[]m4_cr_digits[]_])dnl
_OUT=`echo m4_default([$1], [$PACKAGE-config.h])`
_DEF=`echo _$_OUT | sed -e "y:m4_cr_letters:m4_cr_LETTERS[]:" -e "s/@<:@^m4_cr_Letters@:>@/_/g"`
_PKG=`echo m4_default([$2], [$PACKAGE])`
_LOW=`echo _$_PKG | sed -e "y:m4_cr_LETTERS-:m4_cr_letters[]_:"`
_UPP=`echo $_PKG | sed -e "y:m4_cr_letters-:m4_cr_LETTERS[]_:"  -e "/^@<:@m4_cr_digits@:>@/s/^/_/"`
_INP=`echo "$3" | sed -e 's/ *//'`
if test ".$_INP" = "."; then
   for ac_file in : $CONFIG_HEADERS; do test "_$ac_file" = _: && continue
     case "$ac_file" in
        *.h) _INP=$ac_file ;;
        *)
     esac
     test ".$_INP" != "." && break
   done
fi
if test ".$_INP" = "."; then
   case "$_OUT" in
      */*) _INP=`basename "$_OUT"`
      ;;
      *-*) _INP=`echo "$_OUT" | sed -e "s/@<:@_symbol@:>@*-//"`
      ;;
      *) _INP=config.h
      ;;
   esac
fi
if test -z "$_PKG" ; then
   AC_MSG_ERROR([no prefix for _PREFIX_PKG_CONFIG_H])
else
  if test ! -f "$_INP" ; then if test -f "$srcdir/$_INP" ; then
     _INP="$srcdir/$_INP"
  fi fi
  AC_MSG_NOTICE(creating $_OUT - prefix $_UPP for $_INP defines)
  if test -f $_INP ; then
    AS_ECHO(["s/^@%:@undef  *\\(@<:@m4_cr_LETTERS[]_@:>@\\)/@%:@undef $_UPP""_\\1/"]) > _script
    AS_ECHO(["s/^@%:@undef  *\\(@<:@m4_cr_letters@:>@\\)/@%:@undef $_LOW""_\\1/"]) >> _script
    AS_ECHO(["s/^@%:@def[]ine  *\\(@<:@m4_cr_LETTERS[]_@:>@@<:@_symbol@:>@*\\)\\(.*\\)/@%:@ifndef $_UPP""_\\1\\"]) >> _script
    AS_ECHO(["@%:@def[]ine $_UPP""_\\1\\2\\"]) >> _script
    AS_ECHO(["@%:@endif/"]) >> _script
    AS_ECHO(["s/^@%:@def[]ine  *\\(@<:@m4_cr_letters@:>@@<:@_symbol@:>@*\\)\\(.*\\)/@%:@ifndef $_LOW""_\\1\\"]) >> _script
    AS_ECHO(["@%:@define $_LOW""_\\1\\2\\"]) >> _script
    AS_ECHO(["@%:@endif/"]) >> _script
    # now executing _script on _DEF input to create _OUT output file
    echo "@%:@ifndef $_DEF"      >$tmp/pconfig.h
    echo "@%:@def[]ine $_DEF 1" >>$tmp/pconfig.h
    echo ' ' >>$tmp/pconfig.h
    echo /'*' $_OUT. Generated automatically at end of configure. '*'/ >>$tmp/pconfig.h

    sed -f _script $_INP >>$tmp/pconfig.h
    echo ' ' >>$tmp/pconfig.h
    echo '/* once:' $_DEF '*/' >>$tmp/pconfig.h
    echo "@%:@endif" >>$tmp/pconfig.h
    if cmp -s $_OUT $tmp/pconfig.h 2>/dev/null; then
      AC_MSG_NOTICE([$_OUT is unchanged])
    else
      ac_dir=`AS_DIRNAME(["$_OUT"])`
      AS_MKDIR_P(["$ac_dir"])
      rm -f "$_OUT"
      mv $tmp/pconfig.h "$_OUT"
    fi
  else
    AC_MSG_ERROR([input file $_INP does not exist - skip generating $_OUT])
  fi
  rm -f conftest.*
fi
m4_popdef([_symbol])dnl
m4_popdef([_script])dnl
AS_VAR_POPDEF([_INP])dnl
AS_VAR_POPDEF([_UPP])dnl
AS_VAR_POPDEF([_LOW])dnl
AS_VAR_POPDEF([_PKG])dnl
AS_VAR_POPDEF([_DEF])dnl
AS_VAR_POPDEF([_OUT])dnl
],[PACKAGE="$PACKAGE"])])
m4trace:m4/ax_pthread.m4:92: -1- AU_DEFUN([ACX_PTHREAD], [m4_if($#, 0, [AX_PTHREAD], [AX_PTHREAD($@)])], [], [])
m4trace:m4/ax_pthread.m4:92: -1- AC_DEFUN([ACX_PTHREAD], [m4_warn([obsolete], [The macro 'ACX_PTHREAD' is obsolete.
You should run autoupdate.])dnl
m4_if($#, 0, [AX_PTHREAD], [AX_PTHREAD($@)])])
m4trace:m4/ax_pthread.m4:93: -1- AC_DEFUN([AX_PTHREAD], [
AC_REQUIRE([AC_CANONICAL_TARGET])
AC_REQUIRE([AC_PROG_CC])
AC_REQUIRE([AC_PROG_SED])
AC_LANG_PUSH([C])
ax_pthread_ok=no

# We used to check for pthread.h first, but this fails if pthread.h
# requires special compiler flags (e.g. on Tru64 or Sequent).
# It gets checked for in the link test anyway.

# First of all, check if the user has set any of the PTHREAD_LIBS,
# etcetera environment variables, and if threads linking works using
# them:
if test "x$PTHREAD_CFLAGS$PTHREAD_LIBS" != "x"; then
        ax_pthread_save_CC="$CC"
        ax_pthread_save_CFLAGS="$CFLAGS"
        ax_pthread_save_LIBS="$LIBS"
        AS_IF([test "x$PTHREAD_CC" != "x"], [CC="$PTHREAD_CC"])
        AS_IF([test "x$PTHREAD_CXX" != "x"], [CXX="$PTHREAD_CXX"])
        CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
        LIBS="$PTHREAD_LIBS $LIBS"
        AC_MSG_CHECKING([for pthread_join using $CC $PTHREAD_CFLAGS $PTHREAD_LIBS])
        AC_LINK_IFELSE([AC_LANG_CALL([], [pthread_join])], [ax_pthread_ok=yes])
        AC_MSG_RESULT([$ax_pthread_ok])
        if test "x$ax_pthread_ok" = "xno"; then
                PTHREAD_LIBS=""
                PTHREAD_CFLAGS=""
        fi
        CC="$ax_pthread_save_CC"
        CFLAGS="$ax_pthread_save_CFLAGS"
        LIBS="$ax_pthread_save_LIBS"
fi

# We must check for the threads library under a number of different
# names; the ordering is very important because some systems
# (e.g. DEC) have both -lpthread and -lpthreads, where one of the
# libraries is broken (non-POSIX).

# Create a list of thread flags to try. Items with a "," contain both
# C compiler flags (before ",") and linker flags (after ","). Other items
# starting with a "-" are C compiler flags, and remaining items are
# library names, except for "none" which indicates that we try without
# any flags at all, and "pthread-config" which is a program returning
# the flags for the Pth emulation library.

ax_pthread_flags="pthreads none -Kthread -pthread -pthreads -mthreads pthread --thread-safe -mt pthread-config"

# The ordering *is* (sometimes) important.  Some notes on the
# individual items follow:

# pthreads: AIX (must check this before -lpthread)
# none: in case threads are in libc; should be tried before -Kthread and
#       other compiler flags to prevent continual compiler warnings
# -Kthread: Sequent (threads in libc, but -Kthread needed for pthread.h)
# -pthread: Linux/gcc (kernel threads), BSD/gcc (userland threads), Tru64
#           (Note: HP C rejects this with "bad form for `-t' option")
# -pthreads: Solaris/gcc (Note: HP C also rejects)
# -mt: Sun Workshop C (may only link SunOS threads [-lthread], but it
#      doesn't hurt to check since this sometimes defines pthreads and
#      -D_REENTRANT too), HP C (must be checked before -lpthread, which
#      is present but should not be used directly; and before -mthreads,
#      because the compiler interprets this as "-mt" + "-hreads")
# -mthreads: Mingw32/gcc, Lynx/gcc
# pthread: Linux, etcetera
# --thread-safe: KAI C++
# pthread-config: use pthread-config program (for GNU Pth library)

case $target_os in

        freebsd*)

        # -kthread: FreeBSD kernel threads (preferred to -pthread since SMP-able)
        # lthread: LinuxThreads port on FreeBSD (also preferred to -pthread)

        ax_pthread_flags="-kthread lthread $ax_pthread_flags"
        ;;

        hpux*)

        # From the cc(1) man page: "[-mt] Sets various -D flags to enable
        # multi-threading and also sets -lpthread."

        ax_pthread_flags="-mt -pthread pthread $ax_pthread_flags"
        ;;

        openedition*)

        # IBM z/OS requires a feature-test macro to be defined in order to
        # enable POSIX threads at all, so give the user a hint if this is
        # not set. (We don't define these ourselves, as they can affect
        # other portions of the system API in unpredictable ways.)

        AC_EGREP_CPP([AX_PTHREAD_ZOS_MISSING],
            [
#            if !defined(_OPEN_THREADS) && !defined(_UNIX03_THREADS)
             AX_PTHREAD_ZOS_MISSING
#            endif
            ],
            [AC_MSG_WARN([IBM z/OS requires -D_OPEN_THREADS or -D_UNIX03_THREADS to enable pthreads support.])])
        ;;

        solaris*)

        # On Solaris (at least, for some versions), libc contains stubbed
        # (non-functional) versions of the pthreads routines, so link-based
        # tests will erroneously succeed. (N.B.: The stubs are missing
        # pthread_cleanup_push, or rather a function called by this macro,
        # so we could check for that, but who knows whether they'll stub
        # that too in a future libc.)  So we'll check first for the
        # standard Solaris way of linking pthreads (-mt -lpthread).

        ax_pthread_flags="-mt,-lpthread pthread $ax_pthread_flags"
        ;;
esac

# Are we compiling with Clang?

AC_CACHE_CHECK([whether $CC is Clang],
    [ax_cv_PTHREAD_CLANG],
    [ax_cv_PTHREAD_CLANG=no
     # Note that Autoconf sets GCC=yes for Clang as well as GCC
     if test "x$GCC" = "xyes"; then
        AC_EGREP_CPP([AX_PTHREAD_CC_IS_CLANG],
            [/* Note: Clang 2.7 lacks __clang_[a-z]+__ */
#            if defined(__clang__) && defined(__llvm__)
             AX_PTHREAD_CC_IS_CLANG
#            endif
            ],
            [ax_cv_PTHREAD_CLANG=yes])
     fi
    ])
ax_pthread_clang="$ax_cv_PTHREAD_CLANG"


# GCC generally uses -pthread, or -pthreads on some platforms (e.g. SPARC)

# Note that for GCC and Clang -pthread generally implies -lpthread,
# except when -nostdlib is passed.
# This is problematic using libtool to build C++ shared libraries with pthread:
# [1] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=25460
# [2] https://bugzilla.redhat.com/show_bug.cgi?id=661333
# [3] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=468555
# To solve this, first try -pthread together with -lpthread for GCC

AS_IF([test "x$GCC" = "xyes"],
      [ax_pthread_flags="-pthread,-lpthread -pthread -pthreads $ax_pthread_flags"])

# Clang takes -pthread (never supported any other flag), but we'll try with -lpthread first

AS_IF([test "x$ax_pthread_clang" = "xyes"],
      [ax_pthread_flags="-pthread,-lpthread -pthread"])


# The presence of a feature test macro requesting re-entrant function
# definitions is, on some systems, a strong hint that pthreads support is
# correctly enabled

case $target_os in
        darwin* | hpux* | linux* | osf* | solaris*)
        ax_pthread_check_macro="_REENTRANT"
        ;;

        aix*)
        ax_pthread_check_macro="_THREAD_SAFE"
        ;;

        *)
        ax_pthread_check_macro="--"
        ;;
esac
AS_IF([test "x$ax_pthread_check_macro" = "x--"],
      [ax_pthread_check_cond=0],
      [ax_pthread_check_cond="!defined($ax_pthread_check_macro)"])


if test "x$ax_pthread_ok" = "xno"; then
for ax_pthread_try_flag in $ax_pthread_flags; do

        case $ax_pthread_try_flag in
                none)
                AC_MSG_CHECKING([whether pthreads work without any flags])
                ;;

                *,*)
                PTHREAD_CFLAGS=`echo $ax_pthread_try_flag | sed "s/^\(.*\),\(.*\)$/\1/"`
                PTHREAD_LIBS=`echo $ax_pthread_try_flag | sed "s/^\(.*\),\(.*\)$/\2/"`
                AC_MSG_CHECKING([whether pthreads work with "$PTHREAD_CFLAGS" and "$PTHREAD_LIBS"])
                ;;

                -*)
                AC_MSG_CHECKING([whether pthreads work with $ax_pthread_try_flag])
                PTHREAD_CFLAGS="$ax_pthread_try_flag"
                ;;

                pthread-config)
                AC_CHECK_PROG([ax_pthread_config], [pthread-config], [yes], [no])
                AS_IF([test "x$ax_pthread_config" = "xno"], [continue])
                PTHREAD_CFLAGS="`pthread-config --cflags`"
                PTHREAD_LIBS="`pthread-config --ldflags` `pthread-config --libs`"
                ;;

                *)
                AC_MSG_CHECKING([for the pthreads library -l$ax_pthread_try_flag])
                PTHREAD_LIBS="-l$ax_pthread_try_flag"
                ;;
        esac

        ax_pthread_save_CFLAGS="$CFLAGS"
        ax_pthread_save_LIBS="$LIBS"
        CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
        LIBS="$PTHREAD_LIBS $LIBS"

        # Check for various functions.  We must include pthread.h,
        # since some functions may be macros.  (On the Sequent, we
        # need a special flag -Kthread to make this header compile.)
        # We check for pthread_join because it is in -lpthread on IRIX
        # while pthread_create is in libc.  We check for pthread_attr_init
        # due to DEC craziness with -lpthreads.  We check for
        # pthread_cleanup_push because it is one of the few pthread
        # functions on Solaris that doesn't have a non-functional libc stub.
        # We try pthread_create on general principles.

        AC_LINK_IFELSE([AC_LANG_PROGRAM([#include <pthread.h>
#                       if $ax_pthread_check_cond
#                        error "$ax_pthread_check_macro must be defined"
#                       endif
                        static void *some_global = NULL;
                        static void routine(void *a)
                          {
                             /* To avoid any unused-parameter or
                                unused-but-set-parameter warning.  */
                             some_global = a;
                          }
                        static void *start_routine(void *a) { return a; }],
                       [pthread_t th; pthread_attr_t attr;
                        pthread_create(&th, 0, start_routine, 0);
                        pthread_join(th, 0);
                        pthread_attr_init(&attr);
                        pthread_cleanup_push(routine, 0);
                        pthread_cleanup_pop(0) /* ; */])],
            [ax_pthread_ok=yes],
            [])

        CFLAGS="$ax_pthread_save_CFLAGS"
        LIBS="$ax_pthread_save_LIBS"

        AC_MSG_RESULT([$ax_pthread_ok])
        AS_IF([test "x$ax_pthread_ok" = "xyes"], [break])

        PTHREAD_LIBS=""
        PTHREAD_CFLAGS=""
done
fi


# Clang needs special handling, because older versions handle the -pthread
# option in a rather... idiosyncratic way

if test "x$ax_pthread_clang" = "xyes"; then

        # Clang takes -pthread; it has never supported any other flag

        # (Note 1: This will need to be revisited if a system that Clang
        # supports has POSIX threads in a separate library.  This tends not
        # to be the way of modern systems, but it's conceivable.)

        # (Note 2: On some systems, notably Darwin, -pthread is not needed
        # to get POSIX threads support; the API is always present and
        # active.  We could reasonably leave PTHREAD_CFLAGS empty.  But
        # -pthread does define _REENTRANT, and while the Darwin headers
        # ignore this macro, third-party headers might not.)

        # However, older versions of Clang make a point of warning the user
        # that, in an invocation where only linking and no compilation is
        # taking place, the -pthread option has no effect ("argument unused
        # during compilation").  They expect -pthread to be passed in only
        # when source code is being compiled.
        #
        # Problem is, this is at odds with the way Automake and most other
        # C build frameworks function, which is that the same flags used in
        # compilation (CFLAGS) are also used in linking.  Many systems
        # supported by AX_PTHREAD require exactly this for POSIX threads
        # support, and in fact it is often not straightforward to specify a
        # flag that is used only in the compilation phase and not in
        # linking.  Such a scenario is extremely rare in practice.
        #
        # Even though use of the -pthread flag in linking would only print
        # a warning, this can be a nuisance for well-run software projects
        # that build with -Werror.  So if the active version of Clang has
        # this misfeature, we search for an option to squash it.

        AC_CACHE_CHECK([whether Clang needs flag to prevent "argument unused" warning when linking with -pthread],
            [ax_cv_PTHREAD_CLANG_NO_WARN_FLAG],
            [ax_cv_PTHREAD_CLANG_NO_WARN_FLAG=unknown
             # Create an alternate version of $ac_link that compiles and
             # links in two steps (.c -> .o, .o -> exe) instead of one
             # (.c -> exe), because the warning occurs only in the second
             # step
             ax_pthread_save_ac_link="$ac_link"
             ax_pthread_sed='s/conftest\.\$ac_ext/conftest.$ac_objext/g'
             ax_pthread_link_step=`AS_ECHO(["$ac_link"]) | sed "$ax_pthread_sed"`
             ax_pthread_2step_ac_link="($ac_compile) && (echo ==== >&5) && ($ax_pthread_link_step)"
             ax_pthread_save_CFLAGS="$CFLAGS"
             for ax_pthread_try in '' -Qunused-arguments -Wno-unused-command-line-argument unknown; do
                AS_IF([test "x$ax_pthread_try" = "xunknown"], [break])
                CFLAGS="-Werror -Wunknown-warning-option $ax_pthread_try -pthread $ax_pthread_save_CFLAGS"
                ac_link="$ax_pthread_save_ac_link"
                AC_LINK_IFELSE([AC_LANG_SOURCE([[int main(void){return 0;}]])],
                    [ac_link="$ax_pthread_2step_ac_link"
                     AC_LINK_IFELSE([AC_LANG_SOURCE([[int main(void){return 0;}]])],
                         [break])
                    ])
             done
             ac_link="$ax_pthread_save_ac_link"
             CFLAGS="$ax_pthread_save_CFLAGS"
             AS_IF([test "x$ax_pthread_try" = "x"], [ax_pthread_try=no])
             ax_cv_PTHREAD_CLANG_NO_WARN_FLAG="$ax_pthread_try"
            ])

        case "$ax_cv_PTHREAD_CLANG_NO_WARN_FLAG" in
                no | unknown) ;;
                *) PTHREAD_CFLAGS="$ax_cv_PTHREAD_CLANG_NO_WARN_FLAG $PTHREAD_CFLAGS" ;;
        esac

fi # $ax_pthread_clang = yes



# Various other checks:
if test "x$ax_pthread_ok" = "xyes"; then
        ax_pthread_save_CFLAGS="$CFLAGS"
        ax_pthread_save_LIBS="$LIBS"
        CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
        LIBS="$PTHREAD_LIBS $LIBS"

        # Detect AIX lossage: JOINABLE attribute is called UNDETACHED.
        AC_CACHE_CHECK([for joinable pthread attribute],
            [ax_cv_PTHREAD_JOINABLE_ATTR],
            [ax_cv_PTHREAD_JOINABLE_ATTR=unknown
             for ax_pthread_attr in PTHREAD_CREATE_JOINABLE PTHREAD_CREATE_UNDETACHED; do
                 AC_LINK_IFELSE([AC_LANG_PROGRAM([#include <pthread.h>],
                                                 [int attr = $ax_pthread_attr; return attr /* ; */])],
                                [ax_cv_PTHREAD_JOINABLE_ATTR=$ax_pthread_attr; break],
                                [])
             done
            ])
        AS_IF([test "x$ax_cv_PTHREAD_JOINABLE_ATTR" != "xunknown" && \
               test "x$ax_cv_PTHREAD_JOINABLE_ATTR" != "xPTHREAD_CREATE_JOINABLE" && \
               test "x$ax_pthread_joinable_attr_defined" != "xyes"],
              [AC_DEFINE_UNQUOTED([PTHREAD_CREATE_JOINABLE],
                                  [$ax_cv_PTHREAD_JOINABLE_ATTR],
                                  [Define to necessary symbol if this constant
                                   uses a non-standard name on your system.])
               ax_pthread_joinable_attr_defined=yes
              ])

        AC_CACHE_CHECK([whether more special flags are required for pthreads],
            [ax_cv_PTHREAD_SPECIAL_FLAGS],
            [ax_cv_PTHREAD_SPECIAL_FLAGS=no
             case $target_os in
             solaris*)
             ax_cv_PTHREAD_SPECIAL_FLAGS="-D_POSIX_PTHREAD_SEMANTICS"
             ;;
             esac
            ])
        AS_IF([test "x$ax_cv_PTHREAD_SPECIAL_FLAGS" != "xno" && \
               test "x$ax_pthread_special_flags_added" != "xyes"],
              [PTHREAD_CFLAGS="$ax_cv_PTHREAD_SPECIAL_FLAGS $PTHREAD_CFLAGS"
               ax_pthread_special_flags_added=yes])

        AC_CACHE_CHECK([for PTHREAD_PRIO_INHERIT],
            [ax_cv_PTHREAD_PRIO_INHERIT],
            [AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <pthread.h>]],
                                             [[int i = PTHREAD_PRIO_INHERIT;
                                               return i;]])],
                            [ax_cv_PTHREAD_PRIO_INHERIT=yes],
                            [ax_cv_PTHREAD_PRIO_INHERIT=no])
            ])
        AS_IF([test "x$ax_cv_PTHREAD_PRIO_INHERIT" = "xyes" && \
               test "x$ax_pthread_prio_inherit_defined" != "xyes"],
              [AC_DEFINE([HAVE_PTHREAD_PRIO_INHERIT], [1], [Have PTHREAD_PRIO_INHERIT.])
               ax_pthread_prio_inherit_defined=yes
              ])

        CFLAGS="$ax_pthread_save_CFLAGS"
        LIBS="$ax_pthread_save_LIBS"

        # More AIX lossage: compile with *_r variant
        if test "x$GCC" != "xyes"; then
            case $target_os in
                aix*)
                AS_CASE(["x/$CC"],
                    [x*/c89|x*/c89_128|x*/c99|x*/c99_128|x*/cc|x*/cc128|x*/xlc|x*/xlc_v6|x*/xlc128|x*/xlc128_v6],
                    [#handle absolute path differently from PATH based program lookup
                     AS_CASE(["x$CC"],
                         [x/*],
                         [
			   AS_IF([AS_EXECUTABLE_P([${CC}_r])],[PTHREAD_CC="${CC}_r"])
			   AS_IF([test "x${CXX}" != "x"], [AS_IF([AS_EXECUTABLE_P([${CXX}_r])],[PTHREAD_CXX="${CXX}_r"])])
			 ],
                         [
			   AC_CHECK_PROGS([PTHREAD_CC],[${CC}_r],[$CC])
			   AS_IF([test "x${CXX}" != "x"], [AC_CHECK_PROGS([PTHREAD_CXX],[${CXX}_r],[$CXX])])
			 ]
                     )
                    ])
                ;;
            esac
        fi
fi

test -n "$PTHREAD_CC" || PTHREAD_CC="$CC"
test -n "$PTHREAD_CXX" || PTHREAD_CXX="$CXX"

AC_SUBST([PTHREAD_LIBS])
AC_SUBST([PTHREAD_CFLAGS])
AC_SUBST([PTHREAD_CC])
AC_SUBST([PTHREAD_CXX])

# Finally, execute ACTION-IF-FOUND/ACTION-IF-NOT-FOUND:
if test "x$ax_pthread_ok" = "xyes"; then
        ifelse([$1],,[AC_DEFINE([HAVE_PTHREAD],[1],[Define if you have POSIX threads libraries and header files.])],[$1])
        :
else
        ax_pthread_ok=no
        $2
fi
AC_LANG_POP
])
m4trace:m4/ax_require_defined.m4:35: -1- AC_DEFUN([AX_REQUIRE_DEFINED], [dnl
  m4_ifndef([$1], [m4_fatal([macro ]$1[ is not defined; is a m4 file missing?])])
])
m4trace:m4/libtool.m4:62: -1- AC_DEFUN([LT_INIT], [AC_PREREQ([2.64])dnl We use AC_PATH_PROGS_FEATURE_CHECK
AC_REQUIRE([AC_CONFIG_AUX_DIR_DEFAULT])dnl
AC_BEFORE([$0], [LT_LANG])dnl
AC_BEFORE([$0], [LT_OUTPUT])dnl
AC_BEFORE([$0], [LTDL_INIT])dnl
m4_require([_LT_CHECK_BUILDDIR])dnl

dnl Autoconf doesn't catch unexpanded LT_ macros by default:
m4_pattern_forbid([^_?LT_[A-Z_]+$])dnl
m4_pattern_allow([^(_LT_EOF|LT_DLGLOBAL|LT_DLLAZY_OR_NOW|LT_MULTI_MODULE)$])dnl
dnl aclocal doesn't pull ltoptions.m4, ltsugar.m4, or ltversion.m4
dnl unless we require an AC_DEFUNed macro:
AC_REQUIRE([LTOPTIONS_VERSION])dnl
AC_REQUIRE([LTSUGAR_VERSION])dnl
AC_REQUIRE([LTVERSION_VERSION])dnl
AC_REQUIRE([LTOBSOLETE_VERSION])dnl
m4_require([_LT_PROG_LTMAIN])dnl

_LT_SHELL_INIT([SHELL=${CONFIG_SHELL-/bin/sh}])

dnl Parse OPTIONS
_LT_SET_OPTIONS([$0], [$1])

# This can be used to rebuild libtool when needed
LIBTOOL_DEPS=$ltmain

# Always use our own libtool.
LIBTOOL='$(SHELL) $(top_builddir)/libtool'
AC_SUBST(LIBTOOL)dnl

_LT_SETUP

# Only expand once:
m4_define([LT_INIT])
])
m4trace:m4/libtool.m4:100: -1- AU_DEFUN([AC_PROG_LIBTOOL], [m4_if($#, 0, [LT_INIT], [LT_INIT($@)])], [], [])
m4trace:m4/libtool.m4:100: -1- AC_DEFUN([AC_PROG_LIBTOOL], [m4_warn([obsolete], [The macro 'AC_PROG_LIBTOOL' is obsolete.
You should run autoupdate.])dnl
m4_if($#, 0, [LT_INIT], [LT_INIT($@)])])
m4trace:m4/libtool.m4:101: -1- AU_DEFUN([AM_PROG_LIBTOOL], [m4_if($#, 0, [LT_INIT], [LT_INIT($@)])], [], [])
m4trace:m4/libtool.m4:101: -1- AC_DEFUN([AM_PROG_LIBTOOL], [m4_warn([obsolete], [The macro 'AM_PROG_LIBTOOL' is obsolete.
You should run autoupdate.])dnl
m4_if($#, 0, [LT_INIT], [LT_INIT($@)])])
m4trace:m4/libtool.m4:621: -1- AC_DEFUN([LT_OUTPUT], [: ${CONFIG_LT=./config.lt}
AC_MSG_NOTICE([creating $CONFIG_LT])
_LT_GENERATED_FILE_INIT(["$CONFIG_LT"],
[# Run this file to recreate a libtool stub with the current configuration.])

cat >>"$CONFIG_LT" <<\_LTEOF
lt_cl_silent=false
exec AS_MESSAGE_LOG_FD>>config.log
{
  echo
  AS_BOX([Running $as_me.])
} >&AS_MESSAGE_LOG_FD

lt_cl_help="\
'$as_me' creates a local libtool stub from the current configuration,
for use in further configure time tests before the real libtool is
generated.

Usage: $[0] [[OPTIONS]]

  -h, --help      print this help, then exit
  -V, --version   print version number, then exit
  -q, --quiet     do not print progress messages
  -d, --debug     don't remove temporary files

Report bugs to <bug-libtool@gnu.org>."

lt_cl_version="\
m4_ifset([AC_PACKAGE_NAME], [AC_PACKAGE_NAME ])config.lt[]dnl
m4_ifset([AC_PACKAGE_VERSION], [ AC_PACKAGE_VERSION])
configured by $[0], generated by m4_PACKAGE_STRING.

Copyright (C) 2024 Free Software Foundation, Inc.
This config.lt script is free software; the Free Software Foundation
gives unlimited permission to copy, distribute and modify it."

while test 0 != $[#]
do
  case $[1] in
    --version | --v* | -V )
      echo "$lt_cl_version"; exit 0 ;;
    --help | --h* | -h )
      echo "$lt_cl_help"; exit 0 ;;
    --debug | --d* | -d )
      debug=: ;;
    --quiet | --q* | --silent | --s* | -q )
      lt_cl_silent=: ;;

    -*) AC_MSG_ERROR([unrecognized option: $[1]
Try '$[0] --help' for more information.]) ;;

    *) AC_MSG_ERROR([unrecognized argument: $[1]
Try '$[0] --help' for more information.]) ;;
  esac
  shift
done

if $lt_cl_silent; then
  exec AS_MESSAGE_FD>/dev/null
fi
_LTEOF

cat >>"$CONFIG_LT" <<_LTEOF
_LT_OUTPUT_LIBTOOL_COMMANDS_INIT
_LTEOF

cat >>"$CONFIG_LT" <<\_LTEOF
AC_MSG_NOTICE([creating $ofile])
_LT_OUTPUT_LIBTOOL_COMMANDS
AS_EXIT(0)
_LTEOF
chmod +x "$CONFIG_LT"

# configure is writing to config.log, but config.lt does its own redirection,
# appending to config.log, which fails on DOS, as config.log is still kept
# open by configure.  Here we exec the FD to /dev/null, effectively closing
# config.log, so it can be properly (re)opened and appended to by config.lt.
lt_cl_success=:
test yes = "$silent" &&
  lt_config_lt_args="$lt_config_lt_args --quiet"
exec AS_MESSAGE_LOG_FD>/dev/null
$SHELL "$CONFIG_LT" $lt_config_lt_args || lt_cl_success=false
exec AS_MESSAGE_LOG_FD>>config.log
$lt_cl_success || AS_EXIT(1)
])
m4trace:m4/libtool.m4:813: -1- AC_DEFUN([LT_SUPPORTED_TAG], [])
m4trace:m4/libtool.m4:824: -1- AC_DEFUN([LT_LANG], [AC_BEFORE([$0], [LT_OUTPUT])dnl
m4_case([$1],
  [C],			[_LT_LANG(C)],
  [C++],		[_LT_LANG(CXX)],
  [Go],			[_LT_LANG(GO)],
  [Java],		[_LT_LANG(GCJ)],
  [Fortran 77],		[_LT_LANG(F77)],
  [Fortran],		[_LT_LANG(FC)],
  [Windows Resource],	[_LT_LANG(RC)],
  [m4_ifdef([_LT_LANG_]$1[_CONFIG],
    [_LT_LANG($1)],
    [m4_fatal([$0: unsupported language: "$1"])])])dnl
])
m4trace:m4/libtool.m4:916: -1- AU_DEFUN([AC_LIBTOOL_CXX], [LT_LANG(C++)])
m4trace:m4/libtool.m4:916: -1- AC_DEFUN([AC_LIBTOOL_CXX], [m4_warn([obsolete], [The macro 'AC_LIBTOOL_CXX' is obsolete.
You should run autoupdate.])dnl
LT_LANG(C++)])
m4trace:m4/libtool.m4:917: -1- AU_DEFUN([AC_LIBTOOL_F77], [LT_LANG(Fortran 77)])
m4trace:m4/libtool.m4:917: -1- AC_DEFUN([AC_LIBTOOL_F77], [m4_warn([obsolete], [The macro 'AC_LIBTOOL_F77' is obsolete.
You should run autoupdate.])dnl
LT_LANG(Fortran 77)])
m4trace:m4/libtool.m4:918: -1- AU_DEFUN([AC_LIBTOOL_FC], [LT_LANG(Fortran)])
m4trace:m4/libtool.m4:918: -1- AC_DEFUN([AC_LIBTOOL_FC], [m4_warn([obsolete], [The macro 'AC_LIBTOOL_FC' is obsolete.
You should run autoupdate.])dnl
LT_LANG(Fortran)])
m4trace:m4/libtool.m4:919: -1- AU_DEFUN([AC_LIBTOOL_GCJ], [LT_LANG(Java)])
m4trace:m4/libtool.m4:919: -1- AC_DEFUN([AC_LIBTOOL_GCJ], [m4_warn([obsolete], [The macro 'AC_LIBTOOL_GCJ' is obsolete.
You should run autoupdate.])dnl
LT_LANG(Java)])
m4trace:m4/libtool.m4:920: -1- AU_DEFUN([AC_LIBTOOL_RC], [LT_LANG(Windows Resource)])
m4trace:m4/libtool.m4:920: -1- AC_DEFUN([AC_LIBTOOL_RC], [m4_warn([obsolete], [The macro 'AC_LIBTOOL_RC' is obsolete.
You should run autoupdate.])dnl
LT_LANG(Windows Resource)])
m4trace:m4/libtool.m4:1278: -1- AC_DEFUN([_LT_WITH_SYSROOT], [m4_require([_LT_DECL_SED])dnl
AC_MSG_CHECKING([for sysroot])
AC_ARG_WITH([sysroot],
[AS_HELP_STRING([--with-sysroot@<:@=DIR@:>@],
  [Search for dependent libraries within DIR (or the compiler's sysroot
   if not specified).])],
[], [with_sysroot=no])

dnl lt_sysroot will always be passed unquoted.  We quote it here
dnl in case the user passed a directory name.
lt_sysroot=
case $with_sysroot in #(
 yes)
   if test yes = "$GCC"; then
     # Trim trailing / since we'll always append absolute paths and we want
     # to avoid //, if only for less confusing output for the user.
     lt_sysroot=`$CC --print-sysroot 2>/dev/null | $SED 's:/\+$::'`
   fi
   ;; #(
 /*)
   lt_sysroot=`echo "$with_sysroot" | $SED -e "$sed_quote_subst"`
   ;; #(
 no|'')
   ;; #(
 *)
   AC_MSG_RESULT([$with_sysroot])
   AC_MSG_ERROR([The sysroot must be an absolute path.])
   ;;
esac

 AC_MSG_RESULT([${lt_sysroot:-no}])
_LT_DECL([], [lt_sysroot], [0], [The root where to search for ]dnl
[dependent libraries, and where our libraries should be installed.])])
m4trace:m4/libtool.m4:1618: -1- AC_DEFUN([_LT_COMPILER_OPTION], [m4_require([_LT_FILEUTILS_DEFAULTS])dnl
m4_require([_LT_DECL_SED])dnl
AC_CACHE_CHECK([$1], [$2],
  [$2=no
   m4_if([$4], , [ac_outfile=conftest.$ac_objext], [ac_outfile=$4])
   echo "$lt_simple_compile_test_code" > conftest.$ac_ext
   lt_compiler_flag="$3"  ## exclude from sc_useless_quotes_in_assignment
   # Insert the option either (1) after the last *FLAGS variable, or
   # (2) before a word containing "conftest.", or (3) at the end.
   # Note that $ac_compile itself does not contain backslashes and begins
   # with a dollar sign (not a hyphen), so the echo should work correctly.
   # The option is referenced via a variable to avoid confusing sed.
   lt_compile=`echo "$ac_compile" | $SED \
   -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
   -e 's: [[^ ]]*conftest\.: $lt_compiler_flag&:; t' \
   -e 's:$: $lt_compiler_flag:'`
   (eval echo "\"\$as_me:$LINENO: $lt_compile\"" >&AS_MESSAGE_LOG_FD)
   (eval "$lt_compile" 2>conftest.err)
   ac_status=$?
   cat conftest.err >&AS_MESSAGE_LOG_FD
   echo "$as_me:$LINENO: \$? = $ac_status" >&AS_MESSAGE_LOG_FD
   if (exit $ac_status) && test -s "$ac_outfile"; then
     # The compiler can only warn and ignore the option if not recognized
     # So say no if there are warnings other than the usual output.
     $ECHO "$_lt_compiler_boilerplate" | $SED '/^$/d' >conftest.exp
     $SED '/^$/d; /^ *+/d' conftest.err >conftest.er2
     if test ! -s conftest.er2 || diff conftest.exp conftest.er2 >/dev/null; then
       $2=yes
     fi
   fi
   $RM conftest*
])

if test yes = "[$]$2"; then
    m4_if([$5], , :, [$5])
else
    m4_if([$6], , :, [$6])
fi
])
m4trace:m4/libtool.m4:1660: -1- AU_DEFUN([AC_LIBTOOL_COMPILER_OPTION], [m4_if($#, 0, [_LT_COMPILER_OPTION], [_LT_COMPILER_OPTION($@)])], [], [])
m4trace:m4/libtool.m4:1660: -1- AC_DEFUN([AC_LIBTOOL_COMPILER_OPTION], [m4_warn([obsolete], [The macro 'AC_LIBTOOL_COMPILER_OPTION' is obsolete.
You should run autoupdate.])dnl
m4_if($#, 0, [_LT_COMPILER_OPTION], [_LT_COMPILER_OPTION($@)])])
m4trace:m4/libtool.m4:1669: -1- AC_DEFUN([_LT_LINKER_OPTION], [m4_require([_LT_FILEUTILS_DEFAULTS])dnl
m4_require([_LT_DECL_SED])dnl
AC_CACHE_CHECK([$1], [$2],
  [$2=no
   save_LDFLAGS=$LDFLAGS
   LDFLAGS="$LDFLAGS $3"
   echo "$lt_simple_link_test_code" > conftest.$ac_ext
   if (eval $ac_link 2>conftest.err) && test -s conftest$ac_exeext; then
     # The linker can only warn and ignore the option if not recognized
     # So say no if there are warnings
     if test -s conftest.err; then
       # Append any errors to the config.log.
       cat conftest.err 1>&AS_MESSAGE_LOG_FD
       $ECHO "$_lt_linker_boilerplate" | $SED '/^$/d' > conftest.exp
       $SED '/^$/d; /^ *+/d' conftest.err >conftest.er2
       if diff conftest.exp conftest.er2 >/dev/null; then
         $2=yes
       fi
     else
       $2=yes
     fi
   fi
   $RM -r conftest*
   LDFLAGS=$save_LDFLAGS
])

if test yes = "[$]$2"; then
    m4_if([$4], , :, [$4])
else
    m4_if([$5], , :, [$5])
fi
])
m4trace:m4/libtool.m4:1704: -1- AU_DEFUN([AC_LIBTOOL_LINKER_OPTION], [m4_if($#, 0, [_LT_LINKER_OPTION], [_LT_LINKER_OPTION($@)])], [], [])
m4trace:m4/libtool.m4:1704: -1- AC_DEFUN([AC_LIBTOOL_LINKER_OPTION], [m4_warn([obsolete], [The macro 'AC_LIBTOOL_LINKER_OPTION' is obsolete.
You should run autoupdate.])dnl
m4_if($#, 0, [_LT_LINKER_OPTION], [_LT_LINKER_OPTION($@)])])
m4trace:m4/libtool.m4:1711: -1- AC_DEFUN([LT_CMD_MAX_LEN], [AC_REQUIRE([AC_CANONICAL_HOST])dnl
# find the maximum length of command line arguments
AC_MSG_CHECKING([the maximum length of command line arguments])
AC_CACHE_VAL([lt_cv_sys_max_cmd_len], [dnl
  i=0
  teststring=ABCD

  case $build_os in
  msdosdjgpp*)
    # On DJGPP, this test can blow up pretty badly due to problems in libc
    # (any single argument exceeding 2000 bytes causes a buffer overrun
    # during glob expansion).  Even if it were fixed, the result of this
    # check would be larger than it should be.
    lt_cv_sys_max_cmd_len=12288;    # 12K is about right
    ;;

  gnu* | ironclad*)
    # Under GNU Hurd and Ironclad, this test is not required because there
    # is no limit to the length of command line arguments.
    # Libtool will interpret -1 as no limit whatsoever
    lt_cv_sys_max_cmd_len=-1;
    ;;

  cygwin* | mingw* | windows* | cegcc*)
    # On Win9x/ME, this test blows up -- it succeeds, but takes
    # about 5 minutes as the teststring grows exponentially.
    # Worse, since 9x/ME are not pre-emptively multitasking,
    # you end up with a "frozen" computer, even though with patience
    # the test eventually succeeds (with a max line length of 256k).
    # Instead, let's just punt: use the minimum linelength reported by
    # all of the supported platforms: 8192 (on NT/2K/XP).
    lt_cv_sys_max_cmd_len=8192;
    ;;

  mint*)
    # On MiNT this can take a long time and run out of memory.
    lt_cv_sys_max_cmd_len=8192;
    ;;

  amigaos*)
    # On AmigaOS with pdksh, this test takes hours, literally.
    # So we just punt and use a minimum line length of 8192.
    lt_cv_sys_max_cmd_len=8192;
    ;;

  darwin* | dragonfly* | freebsd* | midnightbsd* | netbsd* | openbsd*)
    # This has been around since 386BSD, at least.  Likely further.
    if test -x /sbin/sysctl; then
      lt_cv_sys_max_cmd_len=`/sbin/sysctl -n kern.argmax`
    elif test -x /usr/sbin/sysctl; then
      lt_cv_sys_max_cmd_len=`/usr/sbin/sysctl -n kern.argmax`
    else
      lt_cv_sys_max_cmd_len=65536	# usable default for all BSDs
    fi
    # And add a safety zone
    lt_cv_sys_max_cmd_len=`expr $lt_cv_sys_max_cmd_len \/ 4`
    lt_cv_sys_max_cmd_len=`expr $lt_cv_sys_max_cmd_len \* 3`
    ;;

  interix*)
    # We know the value 262144 and hardcode it with a safety zone (like BSD)
    lt_cv_sys_max_cmd_len=196608
    ;;

  os2*)
    # The test takes a long time on OS/2.
    lt_cv_sys_max_cmd_len=8192
    ;;

  osf*)
    # Dr. Hans Ekkehard Plesser reports seeing a kernel panic running configure
    # due to this test when exec_disable_arg_limit is 1 on Tru64. It is not
    # nice to cause kernel panics so lets avoid the loop below.
    # First set a reasonable default.
    lt_cv_sys_max_cmd_len=16384
    #
    if test -x /sbin/sysconfig; then
      case `/sbin/sysconfig -q proc exec_disable_arg_limit` in
        *1*) lt_cv_sys_max_cmd_len=-1 ;;
      esac
    fi
    ;;
  sco3.2v5*)
    lt_cv_sys_max_cmd_len=102400
    ;;
  sysv5* | sco5v6* | sysv4.2uw2*)
    kargmax=`grep ARG_MAX /etc/conf/cf.d/stune 2>/dev/null`
    if test -n "$kargmax"; then
      lt_cv_sys_max_cmd_len=`echo $kargmax | $SED 's/.*[[	 ]]//'`
    else
      lt_cv_sys_max_cmd_len=32768
    fi
    ;;
  *)
    lt_cv_sys_max_cmd_len=`(getconf ARG_MAX) 2> /dev/null`
    if test -n "$lt_cv_sys_max_cmd_len" && \
       test undefined != "$lt_cv_sys_max_cmd_len"; then
      lt_cv_sys_max_cmd_len=`expr $lt_cv_sys_max_cmd_len \/ 4`
      lt_cv_sys_max_cmd_len=`expr $lt_cv_sys_max_cmd_len \* 3`
    else
      # Make teststring a little bigger before we do anything with it.
      # a 1K string should be a reasonable start.
      for i in 1 2 3 4 5 6 7 8; do
        teststring=$teststring$teststring
      done
      SHELL=${SHELL-${CONFIG_SHELL-/bin/sh}}
      # If test is not a shell built-in, we'll probably end up computing a
      # maximum length that is only half of the actual maximum length, but
      # we can't tell.
      while { test X`env echo "$teststring$teststring" 2>/dev/null` \
	         = "X$teststring$teststring"; } >/dev/null 2>&1 &&
	      test 17 != "$i" # 1/2 MB should be enough
      do
        i=`expr $i + 1`
        teststring=$teststring$teststring
      done
      # Only check the string length outside the loop.
      lt_cv_sys_max_cmd_len=`expr "X$teststring" : ".*" 2>&1`
      teststring=
      # Add a significant safety factor because C++ compilers can tack on
      # massive amounts of additional arguments before passing them to the
      # linker.  It appears as though 1/2 is a usable value.
      lt_cv_sys_max_cmd_len=`expr $lt_cv_sys_max_cmd_len \/ 2`
    fi
    ;;
  esac
])
if test -n "$lt_cv_sys_max_cmd_len"; then
  AC_MSG_RESULT($lt_cv_sys_max_cmd_len)
else
  AC_MSG_RESULT(none)
fi
max_cmd_len=$lt_cv_sys_max_cmd_len
_LT_DECL([], [max_cmd_len], [0],
    [What is the maximum length of a command?])
])
m4trace:m4/libtool.m4:1850: -1- AU_DEFUN([AC_LIBTOOL_SYS_MAX_CMD_LEN], [m4_if($#, 0, [LT_CMD_MAX_LEN], [LT_CMD_MAX_LEN($@)])], [], [])
m4trace:m4/libtool.m4:1850: -1- AC_DEFUN([AC_LIBTOOL_SYS_MAX_CMD_LEN], [m4_warn([obsolete], [The macro 'AC_LIBTOOL_SYS_MAX_CMD_LEN' is obsolete.
You should run autoupdate.])dnl
m4_if($#, 0, [LT_CMD_MAX_LEN], [LT_CMD_MAX_LEN($@)])])
m4trace:m4/libtool.m4:1961: -1- AC_DEFUN([LT_SYS_DLOPEN_SELF], [m4_require([_LT_HEADER_DLFCN])dnl
if test yes != "$enable_dlopen"; then
  enable_dlopen=unknown
  enable_dlopen_self=unknown
  enable_dlopen_self_static=unknown
else
  lt_cv_dlopen=no
  lt_cv_dlopen_libs=

  case $host_os in
  beos*)
    lt_cv_dlopen=load_add_on
    lt_cv_dlopen_libs=
    lt_cv_dlopen_self=yes
    ;;

  mingw* | windows* | pw32* | cegcc*)
    lt_cv_dlopen=LoadLibrary
    lt_cv_dlopen_libs=
    ;;

  cygwin*)
    lt_cv_dlopen=dlopen
    lt_cv_dlopen_libs=
    ;;

  darwin*)
    # if libdl is installed we need to link against it
    AC_CHECK_LIB([dl], [dlopen],
		[lt_cv_dlopen=dlopen lt_cv_dlopen_libs=-ldl],[
    lt_cv_dlopen=dyld
    lt_cv_dlopen_libs=
    lt_cv_dlopen_self=yes
    ])
    ;;

  tpf*)
    # Don't try to run any link tests for TPF.  We know it's impossible
    # because TPF is a cross-compiler, and we know how we open DSOs.
    lt_cv_dlopen=dlopen
    lt_cv_dlopen_libs=
    lt_cv_dlopen_self=no
    ;;

  *)
    AC_CHECK_FUNC([shl_load],
	  [lt_cv_dlopen=shl_load],
      [AC_CHECK_LIB([dld], [shl_load],
	    [lt_cv_dlopen=shl_load lt_cv_dlopen_libs=-ldld],
	[AC_CHECK_FUNC([dlopen],
	      [lt_cv_dlopen=dlopen],
	  [AC_CHECK_LIB([dl], [dlopen],
		[lt_cv_dlopen=dlopen lt_cv_dlopen_libs=-ldl],
	    [AC_CHECK_LIB([svld], [dlopen],
		  [lt_cv_dlopen=dlopen lt_cv_dlopen_libs=-lsvld],
	      [AC_CHECK_LIB([dld], [dld_link],
		    [lt_cv_dlopen=dld_link lt_cv_dlopen_libs=-ldld])
	      ])
	    ])
	  ])
	])
      ])
    ;;
  esac

  if test no = "$lt_cv_dlopen"; then
    enable_dlopen=no
  else
    enable_dlopen=yes
  fi

  case $lt_cv_dlopen in
  dlopen)
    save_CPPFLAGS=$CPPFLAGS
    test yes = "$ac_cv_header_dlfcn_h" && CPPFLAGS="$CPPFLAGS -DHAVE_DLFCN_H"

    save_LDFLAGS=$LDFLAGS
    wl=$lt_prog_compiler_wl eval LDFLAGS=\"\$LDFLAGS $export_dynamic_flag_spec\"

    save_LIBS=$LIBS
    LIBS="$lt_cv_dlopen_libs $LIBS"

    AC_CACHE_CHECK([whether a program can dlopen itself],
	  lt_cv_dlopen_self, [dnl
	  _LT_TRY_DLOPEN_SELF(
	    lt_cv_dlopen_self=yes, lt_cv_dlopen_self=yes,
	    lt_cv_dlopen_self=no, lt_cv_dlopen_self=cross)
    ])

    if test yes = "$lt_cv_dlopen_self"; then
      wl=$lt_prog_compiler_wl eval LDFLAGS=\"\$LDFLAGS $lt_prog_compiler_static\"
      AC_CACHE_CHECK([whether a statically linked program can dlopen itself],
	  lt_cv_dlopen_self_static, [dnl
	  _LT_TRY_DLOPEN_SELF(
	    lt_cv_dlopen_self_static=yes, lt_cv_dlopen_self_static=yes,
	    lt_cv_dlopen_self_static=no,  lt_cv_dlopen_self_static=cross)
      ])
    fi

    CPPFLAGS=$save_CPPFLAGS
    LDFLAGS=$save_LDFLAGS
    LIBS=$save_LIBS
    ;;
  esac

  case $lt_cv_dlopen_self in
  yes|no) enable_dlopen_self=$lt_cv_dlopen_self ;;
  *) enable_dlopen_self=unknown ;;
  esac

  case $lt_cv_dlopen_self_static in
  yes|no) enable_dlopen_self_static=$lt_cv_dlopen_self_static ;;
  *) enable_dlopen_self_static=unknown ;;
  esac
fi
_LT_DECL([dlopen_support], [enable_dlopen], [0],
	 [Whether dlopen is supported])
_LT_DECL([dlopen_self], [enable_dlopen_self], [0],
	 [Whether dlopen of programs is supported])
_LT_DECL([dlopen_self_static], [enable_dlopen_self_static], [0],
	 [Whether dlopen of statically linked programs is supported])
])
m4trace:m4/libtool.m4:2086: -1- AU_DEFUN([AC_LIBTOOL_DLOPEN_SELF], [m4_if($#, 0, [LT_SYS_DLOPEN_SELF], [LT_SYS_DLOPEN_SELF($@)])], [], [])
m4trace:m4/libtool.m4:2086: -1- AC_DEFUN([AC_LIBTOOL_DLOPEN_SELF], [m4_warn([obsolete], [The macro 'AC_LIBTOOL_DLOPEN_SELF' is obsolete.
You should run autoupdate.])dnl
m4_if($#, 0, [LT_SYS_DLOPEN_SELF], [LT_SYS_DLOPEN_SELF($@)])])
m4trace:m4/libtool.m4:3284: -1- AC_DEFUN([_LT_PATH_TOOL_PREFIX], [m4_require([_LT_DECL_EGREP])dnl
AC_MSG_CHECKING([for $1])
AC_CACHE_VAL(lt_cv_path_MAGIC_CMD,
[case $MAGIC_CMD in
[[\\/*] |  ?:[\\/]*])
  lt_cv_path_MAGIC_CMD=$MAGIC_CMD # Let the user override the test with a path.
  ;;
*)
  lt_save_MAGIC_CMD=$MAGIC_CMD
  lt_save_ifs=$IFS; IFS=$PATH_SEPARATOR
dnl $ac_dummy forces splitting on constant user-supplied paths.
dnl POSIX.2 word splitting is done only on the output of word expansions,
dnl not every word.  This closes a longstanding sh security hole.
  ac_dummy="m4_if([$2], , $PATH, [$2])"
  for ac_dir in $ac_dummy; do
    IFS=$lt_save_ifs
    test -z "$ac_dir" && ac_dir=.
    if test -f "$ac_dir/$1"; then
      lt_cv_path_MAGIC_CMD=$ac_dir/"$1"
      if test -n "$file_magic_test_file"; then
	case $deplibs_check_method in
	"file_magic "*)
	  file_magic_regex=`expr "$deplibs_check_method" : "file_magic \(.*\)"`
	  MAGIC_CMD=$lt_cv_path_MAGIC_CMD
	  if eval $file_magic_cmd \$file_magic_test_file 2> /dev/null |
	    $EGREP "$file_magic_regex" > /dev/null; then
	    :
	  else
	    cat <<_LT_EOF 1>&2

*** Warning: the command libtool uses to detect shared libraries,
*** $file_magic_cmd, produces output that libtool cannot recognize.
*** The result is that libtool may fail to recognize shared libraries
*** as such.  This will affect the creation of libtool libraries that
*** depend on shared libraries, but programs linked with such libtool
*** libraries will work regardless of this problem.  Nevertheless, you
*** may want to report the problem to your system manager and/or to
*** bug-libtool@gnu.org

_LT_EOF
	  fi ;;
	esac
      fi
      break
    fi
  done
  IFS=$lt_save_ifs
  MAGIC_CMD=$lt_save_MAGIC_CMD
  ;;
esac])
MAGIC_CMD=$lt_cv_path_MAGIC_CMD
if test -n "$MAGIC_CMD"; then
  AC_MSG_RESULT($MAGIC_CMD)
else
  AC_MSG_RESULT(no)
fi
_LT_DECL([], [MAGIC_CMD], [0],
	 [Used to examine libraries when file_magic_cmd begins with "file"])dnl
])
m4trace:m4/libtool.m4:3346: -1- AU_DEFUN([AC_PATH_TOOL_PREFIX], [m4_if($#, 0, [_LT_PATH_TOOL_PREFIX], [_LT_PATH_TOOL_PREFIX($@)])], [], [])
m4trace:m4/libtool.m4:3346: -1- AC_DEFUN([AC_PATH_TOOL_PREFIX], [m4_warn([obsolete], [The macro 'AC_PATH_TOOL_PREFIX' is obsolete.
You should run autoupdate.])dnl
m4_if($#, 0, [_LT_PATH_TOOL_PREFIX], [_LT_PATH_TOOL_PREFIX($@)])])
m4trace:m4/libtool.m4:3369: -1- AC_DEFUN([LT_PATH_LD], [AC_REQUIRE([AC_PROG_CC])dnl
AC_REQUIRE([AC_CANONICAL_HOST])dnl
AC_REQUIRE([AC_CANONICAL_BUILD])dnl
m4_require([_LT_DECL_SED])dnl
m4_require([_LT_DECL_EGREP])dnl
m4_require([_LT_PROG_ECHO_BACKSLASH])dnl

AC_ARG_WITH([gnu-ld],
    [AS_HELP_STRING([--with-gnu-ld],
	[assume the C compiler uses GNU ld @<:@default=no@:>@])],
    [test no = "$withval" || with_gnu_ld=yes],
    [with_gnu_ld=no])dnl

ac_prog=ld
if test yes = "$GCC"; then
  # Check if gcc -print-prog-name=ld gives a path.
  AC_MSG_CHECKING([for ld used by $CC])
  case $host in
  *-*-mingw* | *-*-windows*)
    # gcc leaves a trailing carriage return, which upsets mingw
    ac_prog=`($CC -print-prog-name=ld) 2>&5 | tr -d '\015'` ;;
  *)
    ac_prog=`($CC -print-prog-name=ld) 2>&5` ;;
  esac
  case $ac_prog in
    # Accept absolute paths.
    [[\\/]]* | ?:[[\\/]]*)
      re_direlt='/[[^/]][[^/]]*/\.\./'
      # Canonicalize the pathname of ld
      ac_prog=`$ECHO "$ac_prog"| $SED 's%\\\\%/%g'`
      while $ECHO "$ac_prog" | $GREP "$re_direlt" > /dev/null 2>&1; do
	ac_prog=`$ECHO $ac_prog| $SED "s%$re_direlt%/%"`
      done
      test -z "$LD" && LD=$ac_prog
      ;;
  "")
    # If it fails, then pretend we aren't using GCC.
    ac_prog=ld
    ;;
  *)
    # If it is relative, then search for the first ld in PATH.
    with_gnu_ld=unknown
    ;;
  esac
elif test yes = "$with_gnu_ld"; then
  AC_MSG_CHECKING([for GNU ld])
else
  AC_MSG_CHECKING([for non-GNU ld])
fi
AC_CACHE_VAL(lt_cv_path_LD,
[if test -z "$LD"; then
  lt_save_ifs=$IFS; IFS=$PATH_SEPARATOR
  for ac_dir in $PATH; do
    IFS=$lt_save_ifs
    test -z "$ac_dir" && ac_dir=.
    if test -f "$ac_dir/$ac_prog" || test -f "$ac_dir/$ac_prog$ac_exeext"; then
      lt_cv_path_LD=$ac_dir/$ac_prog
      # Check to see if the program is GNU ld.  I'd rather use --version,
      # but apparently some variants of GNU ld only accept -v.
      # Break only if it was the GNU/non-GNU ld that we prefer.
      case `"$lt_cv_path_LD" -v 2>&1 </dev/null` in
      *GNU* | *'with BFD'*)
	test no != "$with_gnu_ld" && break
	;;
      *)
	test yes != "$with_gnu_ld" && break
	;;
      esac
    fi
  done
  IFS=$lt_save_ifs
else
  lt_cv_path_LD=$LD # Let the user override the test with a path.
fi])
LD=$lt_cv_path_LD
if test -n "$LD"; then
  AC_MSG_RESULT($LD)
else
  AC_MSG_RESULT(no)
fi
test -z "$LD" && AC_MSG_ERROR([no acceptable ld found in \$PATH])
_LT_PATH_LD_GNU
AC_SUBST([LD])

_LT_TAGDECL([], [LD], [1], [The linker used to build libraries])
])
m4trace:m4/libtool.m4:3458: -1- AU_DEFUN([AM_PROG_LD], [m4_if($#, 0, [LT_PATH_LD], [LT_PATH_LD($@)])], [], [])
m4trace:m4/libtool.m4:3458: -1- AC_DEFUN([AM_PROG_LD], [m4_warn([obsolete], [The macro 'AM_PROG_LD' is obsolete.
You should run autoupdate.])dnl
m4_if($#, 0, [LT_PATH_LD], [LT_PATH_LD($@)])])
m4trace:m4/libtool.m4:3459: -1- AU_DEFUN([AC_PROG_LD], [m4_if($#, 0, [LT_PATH_LD], [LT_PATH_LD($@)])], [], [])
m4trace:m4/libtool.m4:3459: -1- AC_DEFUN([AC_PROG_LD], [m4_warn([obsolete], [The macro 'AC_PROG_LD' is obsolete.
You should run autoupdate.])dnl
m4_if($#, 0, [LT_PATH_LD], [LT_PATH_LD($@)])])
m4trace:m4/libtool.m4:3795: -1- AC_DEFUN([LT_PATH_NM], [AC_REQUIRE([AC_PROG_CC])dnl
AC_CACHE_CHECK([for BSD- or MS-compatible name lister (nm)], lt_cv_path_NM,
[if test -n "$NM"; then
  # Let the user override the test.
  lt_cv_path_NM=$NM
else
  lt_nm_to_check=${ac_tool_prefix}nm
  if test -n "$ac_tool_prefix" && test "$build" = "$host"; then
    lt_nm_to_check="$lt_nm_to_check nm"
  fi
  for lt_tmp_nm in $lt_nm_to_check; do
    lt_save_ifs=$IFS; IFS=$PATH_SEPARATOR
    for ac_dir in $PATH /usr/ccs/bin/elf /usr/ccs/bin /usr/ucb /bin; do
      IFS=$lt_save_ifs
      test -z "$ac_dir" && ac_dir=.
      tmp_nm=$ac_dir/$lt_tmp_nm
      if test -f "$tmp_nm" || test -f "$tmp_nm$ac_exeext"; then
	# Check to see if the nm accepts a BSD-compat flag.
	# Adding the 'sed 1q' prevents false positives on HP-UX, which says:
	#   nm: unknown option "B" ignored
	# Tru64's nm complains that /dev/null is an invalid object file
	# MSYS converts /dev/null to NUL, MinGW nm treats NUL as empty
	case $build_os in
	mingw* | windows*) lt_bad_file=conftest.nm/nofile ;;
	*) lt_bad_file=/dev/null ;;
	esac
	case `"$tmp_nm" -B $lt_bad_file 2>&1 | $SED '1q'` in
	*$lt_bad_file* | *'Invalid file or object type'*)
	  lt_cv_path_NM="$tmp_nm -B"
	  break 2
	  ;;
	*)
	  case `"$tmp_nm" -p /dev/null 2>&1 | $SED '1q'` in
	  */dev/null*)
	    lt_cv_path_NM="$tmp_nm -p"
	    break 2
	    ;;
	  *)
	    lt_cv_path_NM=${lt_cv_path_NM="$tmp_nm"} # keep the first match, but
	    continue # so that we can try to find one that supports BSD flags
	    ;;
	  esac
	  ;;
	esac
      fi
    done
    IFS=$lt_save_ifs
  done
  : ${lt_cv_path_NM=no}
fi])
if test no != "$lt_cv_path_NM"; then
  NM=$lt_cv_path_NM
else
  # Didn't find any BSD compatible name lister, look for dumpbin.
  if test -n "$DUMPBIN"; then :
    # Let the user override the test.
  else
    AC_CHECK_TOOLS(DUMPBIN, [dumpbin "link -dump"], :)
    case `$DUMPBIN -symbols -headers /dev/null 2>&1 | $SED '1q'` in
    *COFF*)
      DUMPBIN="$DUMPBIN -symbols -headers"
      ;;
    *)
      DUMPBIN=:
      ;;
    esac
  fi
  AC_SUBST([DUMPBIN])
  if test : != "$DUMPBIN"; then
    NM=$DUMPBIN
  fi
fi
test -z "$NM" && NM=nm
AC_SUBST([NM])
_LT_DECL([], [NM], [1], [A BSD- or MS-compatible name lister])dnl

AC_CACHE_CHECK([the name lister ($NM) interface], [lt_cv_nm_interface],
  [lt_cv_nm_interface="BSD nm"
  echo "int some_variable = 0;" > conftest.$ac_ext
  (eval echo "\"\$as_me:$LINENO: $ac_compile\"" >&AS_MESSAGE_LOG_FD)
  (eval "$ac_compile" 2>conftest.err)
  cat conftest.err >&AS_MESSAGE_LOG_FD
  (eval echo "\"\$as_me:$LINENO: $NM \\\"conftest.$ac_objext\\\"\"" >&AS_MESSAGE_LOG_FD)
  (eval "$NM \"conftest.$ac_objext\"" 2>conftest.err > conftest.out)
  cat conftest.err >&AS_MESSAGE_LOG_FD
  (eval echo "\"\$as_me:$LINENO: output\"" >&AS_MESSAGE_LOG_FD)
  cat conftest.out >&AS_MESSAGE_LOG_FD
  if $GREP 'External.*some_variable' conftest.out > /dev/null; then
    lt_cv_nm_interface="MS dumpbin"
  fi
  rm -f conftest*])
])
m4trace:m4/libtool.m4:3890: -1- AU_DEFUN([AM_PROG_NM], [m4_if($#, 0, [LT_PATH_NM], [LT_PATH_NM($@)])], [], [])
m4trace:m4/libtool.m4:3890: -1- AC_DEFUN([AM_PROG_NM], [m4_warn([obsolete], [The macro 'AM_PROG_NM' is obsolete.
You should run autoupdate.])dnl
m4_if($#, 0, [LT_PATH_NM], [LT_PATH_NM($@)])])
m4trace:m4/libtool.m4:3891: -1- AU_DEFUN([AC_PROG_NM], [m4_if($#, 0, [LT_PATH_NM], [LT_PATH_NM($@)])], [], [])
m4trace:m4/libtool.m4:3891: -1- AC_DEFUN([AC_PROG_NM], [m4_warn([obsolete], [The macro 'AC_PROG_NM' is obsolete.
You should run autoupdate.])dnl
m4_if($#, 0, [LT_PATH_NM], [LT_PATH_NM($@)])])
m4trace:m4/libtool.m4:3962: -1- AC_DEFUN([_LT_DLL_DEF_P], [dnl
  test DEF = "`$SED -n dnl
    -e '\''s/^[[	 ]]*//'\'' dnl Strip leading whitespace
    -e '\''/^\(;.*\)*$/d'\'' dnl      Delete empty lines and comments
    -e '\''s/^\(EXPORTS\|LIBRARY\)\([[	 ]].*\)*$/DEF/p'\'' dnl
    -e q dnl                          Only consider the first "real" line
    $1`" dnl
])
m4trace:m4/libtool.m4:3976: -1- AC_DEFUN([LT_LIB_M], [AC_REQUIRE([AC_CANONICAL_HOST])dnl
LIBM=
case $host in
*-*-beos* | *-*-cegcc* | *-*-cygwin* | *-*-haiku* | *-*-mingw* | *-*-pw32* | *-*-darwin*)
  # These system don't have libm, or don't need it
  ;;
*-ncr-sysv4.3*)
  AC_CHECK_LIB(mw, _mwvalidcheckl, LIBM=-lmw)
  AC_CHECK_LIB(m, cos, LIBM="$LIBM -lm")
  ;;
*)
  AC_CHECK_LIB(m, cos, LIBM=-lm)
  ;;
esac
AC_SUBST([LIBM])
])
m4trace:m4/libtool.m4:3995: -1- AU_DEFUN([AC_CHECK_LIBM], [m4_if($#, 0, [LT_LIB_M], [LT_LIB_M($@)])], [], [])
m4trace:m4/libtool.m4:3995: -1- AC_DEFUN([AC_CHECK_LIBM], [m4_warn([obsolete], [The macro 'AC_CHECK_LIBM' is obsolete.
You should run autoupdate.])dnl
m4_if($#, 0, [LT_LIB_M], [LT_LIB_M($@)])])
m4trace:m4/libtool.m4:8300: -1- AC_DEFUN([LT_PROG_GCJ], [m4_ifdef([AC_PROG_GCJ], [AC_PROG_GCJ],
  [m4_ifdef([A][M_PROG_GCJ], [A][M_PROG_GCJ],
    [AC_CHECK_TOOL(GCJ, gcj,)
      test set = "${GCJFLAGS+set}" || GCJFLAGS="-g -O2"
      AC_SUBST(GCJFLAGS)])])[]dnl
])
m4trace:m4/libtool.m4:8309: -1- AU_DEFUN([LT_AC_PROG_GCJ], [m4_if($#, 0, [LT_PROG_GCJ], [LT_PROG_GCJ($@)])], [], [])
m4trace:m4/libtool.m4:8309: -1- AC_DEFUN([LT_AC_PROG_GCJ], [m4_warn([obsolete], [The macro 'LT_AC_PROG_GCJ' is obsolete.
You should run autoupdate.])dnl
m4_if($#, 0, [LT_PROG_GCJ], [LT_PROG_GCJ($@)])])
m4trace:m4/libtool.m4:8316: -1- AC_DEFUN([LT_PROG_GO], [AC_CHECK_TOOL(GOC, gccgo,)
])
m4trace:m4/libtool.m4:8323: -1- AC_DEFUN([LT_PROG_RC], [AC_CHECK_TOOL(RC, windres,)
])
m4trace:m4/libtool.m4:8328: -1- AU_DEFUN([LT_AC_PROG_RC], [m4_if($#, 0, [LT_PROG_RC], [LT_PROG_RC($@)])], [], [])
m4trace:m4/libtool.m4:8328: -1- AC_DEFUN([LT_AC_PROG_RC], [m4_warn([obsolete], [The macro 'LT_AC_PROG_RC' is obsolete.
You should run autoupdate.])dnl
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AS_VAR_PUSHDEF([FLAGS], [m4_default($2,_AC_LANG_PREFIX[FLAGS])])
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AS_VAR_PUSHDEF([CACHEVAR],[ax_cv_check_[]_AC_LANG_ABBREV[]flags_$4_$1])dnl
AC_CACHE_CHECK([whether _AC_LANG compiler accepts $1], CACHEVAR, [
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	# allow to override gcov location
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	AC_MSG_CHECKING([whether to build with code coverage support])
	AC_ARG_ENABLE([code-coverage],
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	AM_CONDITIONAL([CODE_COVERAGE_ENABLED], [test x$enable_code_coverage = xyes])
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		  [:])
		AS_IF([test "X$GCOV" = "X:"],
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		AC_SUBST([GCOV])

		dnl Check if gcc is being used
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		AS_IF([ test -z "$LCOV" ], [
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		AS_IF([ test -z "$GENHTML" ], [
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		])

		dnl Build the code coverage flags
		dnl Define CODE_COVERAGE_LDFLAGS for backwards compatibility
		CODE_COVERAGE_CPPFLAGS="-DNDEBUG"
		CODE_COVERAGE_CFLAGS="-O0 -g -fprofile-arcs -ftest-coverage"
		CODE_COVERAGE_CXXFLAGS="-O0 -g -fprofile-arcs -ftest-coverage"
		CODE_COVERAGE_LIBS="-lgcov"
		CODE_COVERAGE_LDFLAGS="$CODE_COVERAGE_LIBS"

		AC_SUBST([CODE_COVERAGE_CPPFLAGS])
		AC_SUBST([CODE_COVERAGE_CFLAGS])
		AC_SUBST([CODE_COVERAGE_CXXFLAGS])
		AC_SUBST([CODE_COVERAGE_LIBS])
		AC_SUBST([CODE_COVERAGE_LDFLAGS])

		[CODE_COVERAGE_RULES_CHECK='
	-$(A''M_V_at)$(MAKE) $(AM_MAKEFLAGS) -k check
	$(A''M_V_at)$(MAKE) $(AM_MAKEFLAGS) code-coverage-capture
']
		[CODE_COVERAGE_RULES_CAPTURE='
	$(code_coverage_v_lcov_cap)$(LCOV) $(code_coverage_quiet) $(addprefix --directory ,$(CODE_COVERAGE_DIRECTORY)) --capture --output-file "$(CODE_COVERAGE_OUTPUT_FILE).tmp" --test-name "$(call code_coverage_sanitize,$(PACKAGE_NAME)-$(PACKAGE_VERSION))" --no-checksum --compat-libtool $(CODE_COVERAGE_LCOV_SHOPTS) $(CODE_COVERAGE_LCOV_OPTIONS)
	$(code_coverage_v_lcov_ign)$(LCOV) $(code_coverage_quiet) $(addprefix --directory ,$(CODE_COVERAGE_DIRECTORY)) --remove "$(CODE_COVERAGE_OUTPUT_FILE).tmp" "/tmp/*" $(CODE_COVERAGE_IGNORE_PATTERN) --output-file "$(CODE_COVERAGE_OUTPUT_FILE)" $(CODE_COVERAGE_LCOV_SHOPTS) $(CODE_COVERAGE_LCOV_RMOPTS)
	-@rm -f $(CODE_COVERAGE_OUTPUT_FILE).tmp
	$(code_coverage_v_genhtml)LANG=C $(GENHTML) $(code_coverage_quiet) $(addprefix --prefix ,$(CODE_COVERAGE_DIRECTORY)) --output-directory "$(CODE_COVERAGE_OUTPUT_DIRECTORY)" --title "$(PACKAGE_NAME)-$(PACKAGE_VERSION) Code Coverage" --legend --show-details "$(CODE_COVERAGE_OUTPUT_FILE)" $(CODE_COVERAGE_GENHTML_OPTIONS)
	@echo "file://$(abs_builddir)/$(CODE_COVERAGE_OUTPUT_DIRECTORY)/index.html"
']
		[CODE_COVERAGE_RULES_CLEAN='
clean: code-coverage-clean
distclean: code-coverage-clean
code-coverage-clean:
	-$(LCOV) --directory $(top_builddir) -z
	-rm -rf $(CODE_COVERAGE_OUTPUT_FILE) $(CODE_COVERAGE_OUTPUT_FILE).tmp $(CODE_COVERAGE_OUTPUT_DIRECTORY)
	-find . \( -name "*.gcda" -o -name "*.gcno" -o -name "*.gcov" \) -delete
']
	], [
		[CODE_COVERAGE_RULES_CHECK='
	@echo "Need to reconfigure with --enable-code-coverage"
']
		CODE_COVERAGE_RULES_CAPTURE="$CODE_COVERAGE_RULES_CHECK"
		CODE_COVERAGE_RULES_CLEAN=''
	])

[CODE_COVERAGE_RULES='
# Code coverage
#
# Optional:
#  - CODE_COVERAGE_DIRECTORY: Top-level directory for code coverage reporting.
#    Multiple directories may be specified, separated by whitespace.
#    (Default: $(top_builddir))
#  - CODE_COVERAGE_OUTPUT_FILE: Filename and path for the .info file generated
#    by lcov for code coverage. (Default:
#    $(PACKAGE_NAME)-$(PACKAGE_VERSION)-coverage.info)
#  - CODE_COVERAGE_OUTPUT_DIRECTORY: Directory for generated code coverage
#    reports to be created. (Default:
#    $(PACKAGE_NAME)-$(PACKAGE_VERSION)-coverage)
#  - CODE_COVERAGE_BRANCH_COVERAGE: Set to 1 to enforce branch coverage,
#    set to 0 to disable it and leave empty to stay with the default.
#    (Default: empty)
#  - CODE_COVERAGE_LCOV_SHOPTS_DEFAULT: Extra options shared between both lcov
#    instances. (Default: based on $CODE_COVERAGE_BRANCH_COVERAGE)
#  - CODE_COVERAGE_LCOV_SHOPTS: Extra options to shared between both lcov
#    instances. (Default: $CODE_COVERAGE_LCOV_SHOPTS_DEFAULT)
#  - CODE_COVERAGE_LCOV_OPTIONS_GCOVPATH: --gcov-tool pathtogcov
#  - CODE_COVERAGE_LCOV_OPTIONS_DEFAULT: Extra options to pass to the
#    collecting lcov instance. (Default: $CODE_COVERAGE_LCOV_OPTIONS_GCOVPATH)
#  - CODE_COVERAGE_LCOV_OPTIONS: Extra options to pass to the collecting lcov
#    instance. (Default: $CODE_COVERAGE_LCOV_OPTIONS_DEFAULT)
#  - CODE_COVERAGE_LCOV_RMOPTS_DEFAULT: Extra options to pass to the filtering
#    lcov instance. (Default: empty)
#  - CODE_COVERAGE_LCOV_RMOPTS: Extra options to pass to the filtering lcov
#    instance. (Default: $CODE_COVERAGE_LCOV_RMOPTS_DEFAULT)
#  - CODE_COVERAGE_GENHTML_OPTIONS_DEFAULT: Extra options to pass to the
#    genhtml instance. (Default: based on $CODE_COVERAGE_BRANCH_COVERAGE)
#  - CODE_COVERAGE_GENHTML_OPTIONS: Extra options to pass to the genhtml
#    instance. (Default: $CODE_COVERAGE_GENHTML_OPTIONS_DEFAULT)
#  - CODE_COVERAGE_IGNORE_PATTERN: Extra glob pattern of files to ignore
#
# The generated report will be titled using the $(PACKAGE_NAME) and
# $(PACKAGE_VERSION). In order to add the current git hash to the title,
# use the git-version-gen script, available online.

# Optional variables
CODE_COVERAGE_DIRECTORY ?= $(top_builddir)
CODE_COVERAGE_OUTPUT_FILE ?= $(PACKAGE_NAME)-$(PACKAGE_VERSION)-coverage.info
CODE_COVERAGE_OUTPUT_DIRECTORY ?= $(PACKAGE_NAME)-$(PACKAGE_VERSION)-coverage
CODE_COVERAGE_BRANCH_COVERAGE ?=
CODE_COVERAGE_LCOV_SHOPTS_DEFAULT ?= $(if $(CODE_COVERAGE_BRANCH_COVERAGE),\
--rc lcov_branch_coverage=$(CODE_COVERAGE_BRANCH_COVERAGE))
CODE_COVERAGE_LCOV_SHOPTS ?= $(CODE_COVERAGE_LCOV_SHOPTS_DEFAULT)
CODE_COVERAGE_LCOV_OPTIONS_GCOVPATH ?= --gcov-tool "$(GCOV)"
CODE_COVERAGE_LCOV_OPTIONS_DEFAULT ?= $(CODE_COVERAGE_LCOV_OPTIONS_GCOVPATH)
CODE_COVERAGE_LCOV_OPTIONS ?= $(CODE_COVERAGE_LCOV_OPTIONS_DEFAULT)
CODE_COVERAGE_LCOV_RMOPTS_DEFAULT ?=
CODE_COVERAGE_LCOV_RMOPTS ?= $(CODE_COVERAGE_LCOV_RMOPTS_DEFAULT)
CODE_COVERAGE_GENHTML_OPTIONS_DEFAULT ?=\
$(if $(CODE_COVERAGE_BRANCH_COVERAGE),\
--rc genhtml_branch_coverage=$(CODE_COVERAGE_BRANCH_COVERAGE))
CODE_COVERAGE_GENHTML_OPTIONS ?= $(CODE_COVERAGE_GENHTML_OPTIONS_DEFAULT)
CODE_COVERAGE_IGNORE_PATTERN ?=

GITIGNOREFILES ?=
GITIGNOREFILES += $(CODE_COVERAGE_OUTPUT_FILE) $(CODE_COVERAGE_OUTPUT_DIRECTORY)

code_coverage_v_lcov_cap = $(code_coverage_v_lcov_cap_$(V))
code_coverage_v_lcov_cap_ = $(code_coverage_v_lcov_cap_$(AM_DEFAULT_VERBOSITY))
code_coverage_v_lcov_cap_0 = @echo "  LCOV   --capture"\
 $(CODE_COVERAGE_OUTPUT_FILE);
code_coverage_v_lcov_ign = $(code_coverage_v_lcov_ign_$(V))
code_coverage_v_lcov_ign_ = $(code_coverage_v_lcov_ign_$(AM_DEFAULT_VERBOSITY))
code_coverage_v_lcov_ign_0 = @echo "  LCOV   --remove /tmp/*"\
 $(CODE_COVERAGE_IGNORE_PATTERN);
code_coverage_v_genhtml = $(code_coverage_v_genhtml_$(V))
code_coverage_v_genhtml_ = $(code_coverage_v_genhtml_$(AM_DEFAULT_VERBOSITY))
code_coverage_v_genhtml_0 = @echo "  GEN   " $(CODE_COVERAGE_OUTPUT_DIRECTORY);
code_coverage_quiet = $(code_coverage_quiet_$(V))
code_coverage_quiet_ = $(code_coverage_quiet_$(AM_DEFAULT_VERBOSITY))
code_coverage_quiet_0 = --quiet

# sanitizes the test-name: replaces with underscores: dashes and dots
code_coverage_sanitize = $(subst -,_,$(subst .,_,$(1)))

# Use recursive makes in order to ignore errors during check
check-code-coverage:'"$CODE_COVERAGE_RULES_CHECK"'

# Capture code coverage data
code-coverage-capture: code-coverage-capture-hook'"$CODE_COVERAGE_RULES_CAPTURE"'

# Hook rule executed before code-coverage-capture, overridable by the user
code-coverage-capture-hook:

'"$CODE_COVERAGE_RULES_CLEAN"'

A''M_DISTCHECK_CONFIGURE_FLAGS ?=
A''M_DISTCHECK_CONFIGURE_FLAGS += --disable-code-coverage

.PHONY: check-code-coverage code-coverage-capture code-coverage-capture-hook code-coverage-clean
']

	AC_SUBST([CODE_COVERAGE_RULES])
	m4_ifdef([_AM_SUBST_NOTMAKE], [_AM_SUBST_NOTMAKE([CODE_COVERAGE_RULES])])
])
m4trace:m4/m4_ax_compiler_flags_cxxflags.m4:31: -1- AC_DEFUN([AX_COMPILER_FLAGS_CXXFLAGS], [
    AC_REQUIRE([AC_PROG_SED])
    AX_REQUIRE_DEFINED([AX_APPEND_COMPILE_FLAGS])
    AX_REQUIRE_DEFINED([AX_APPEND_FLAG])
    AX_REQUIRE_DEFINED([AX_CHECK_COMPILE_FLAG])

    # Variable names
    m4_define([ax_warn_cxxflags_variable],
              [m4_normalize(ifelse([$1],,[WARN_CXXFLAGS],[$1]))])

    AC_LANG_PUSH([C++])

    # Always pass -Werror=unknown-warning-option to get Clang to fail on bad
    # flags, otherwise they are always appended to the warn_cxxflags variable,
    # and Clang warns on them for every compilation unit.
    # If this is passed to GCC, it will explode, so the flag must be enabled
    # conditionally.
    AX_CHECK_COMPILE_FLAG([-Werror=unknown-warning-option],[
        ax_compiler_flags_test="-Werror=unknown-warning-option"
    ],[
        ax_compiler_flags_test=""
    ])

    # Check that -Wno-suggest-attribute=format is supported
    AX_CHECK_COMPILE_FLAG([-Wno-suggest-attribute=format],[
        ax_compiler_no_suggest_attribute_flags="-Wno-suggest-attribute=format"
    ],[
        ax_compiler_no_suggest_attribute_flags=""
    ])

    # Base flags
    AX_APPEND_COMPILE_FLAGS([ dnl
        -fno-strict-aliasing dnl
        $3 dnl
    ],ax_warn_cxxflags_variable,[$ax_compiler_flags_test])

    AS_IF([test "$ax_enable_compile_warnings" != "no"],[
        # "yes" flags
        AX_APPEND_COMPILE_FLAGS([ dnl
            -Wall dnl
            -Wextra dnl
            -Wundef dnl
            -Wwrite-strings dnl
            -Wpointer-arith dnl
            -Wmissing-declarations dnl
            -Wredundant-decls dnl
            -Wno-unused-parameter dnl
            -Wno-missing-field-initializers dnl
            -Wformat=2 dnl
            -Wcast-align dnl
            -Wformat-nonliteral dnl
            -Wformat-security dnl
            -Wsign-compare dnl
            -Wstrict-aliasing dnl
            -Wshadow dnl
            -Winline dnl
            -Wpacked dnl
            -Wmissing-format-attribute dnl
            -Wmissing-noreturn dnl
            -Winit-self dnl
            -Wredundant-decls dnl
            -Wmissing-include-dirs dnl
            -Wunused-but-set-variable dnl
            -Warray-bounds dnl
            -Wreturn-type dnl
            -Wno-overloaded-virtual dnl
            -Wswitch-enum dnl
            -Wswitch-default dnl
            $4 dnl
            $5 dnl
            $6 dnl
            $7 dnl
        ],ax_warn_cxxflags_variable,[$ax_compiler_flags_test])
    ])
    AS_IF([test "$ax_enable_compile_warnings" = "error"],[
        # "error" flags; -Werror has to be appended unconditionally because
        # it's not possible to test for
        #
        # suggest-attribute=format is disabled because it gives too many false
        # positives
        AX_APPEND_FLAG([-Werror],ax_warn_cxxflags_variable)

        AX_APPEND_COMPILE_FLAGS([ dnl
            [$ax_compiler_no_suggest_attribute_flags] dnl
        ],ax_warn_cxxflags_variable,[$ax_compiler_flags_test])
    ])

    # In the flags below, when disabling specific flags, always add *both*
    # -Wno-foo and -Wno-error=foo. This fixes the situation where (for example)
    # we enable -Werror, disable a flag, and a build bot passes CXXFLAGS=-Wall,
    # which effectively turns that flag back on again as an error.
    for flag in $ax_warn_cxxflags_variable; do
        AS_CASE([$flag],
                [-Wno-*=*],[],
                [-Wno-*],[
                    AX_APPEND_COMPILE_FLAGS([-Wno-error=$(AS_ECHO([$flag]) | $SED 's/^-Wno-//')],
                                            ax_warn_cxxflags_variable,
                                            [$ax_compiler_flags_test])
                ])
    done

    AC_LANG_POP([C++])

    # Substitute the variables
    AC_SUBST(ax_warn_cxxflags_variable)
])
m4trace:m4/m4_ax_cxx_compile_stdcxx.m4:48: -1- AX_REQUIRE_DEFINED([AC_MSG_WARN])
m4trace:m4/m4_ax_cxx_compile_stdcxx.m4:49: -1- AC_DEFUN([AX_CXX_COMPILE_STDCXX], [dnl
  m4_if([$1], [11], [ax_cxx_compile_alternatives="11 0x"],
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        [$1], [17], [ax_cxx_compile_alternatives="17 1z"],
        [m4_fatal([invalid first argument `$1' to AX_CXX_COMPILE_STDCXX])])dnl
  m4_if([$2], [], [],
        [$2], [ext], [],
        [$2], [noext], [],
        [m4_fatal([invalid second argument `$2' to AX_CXX_COMPILE_STDCXX])])dnl
  m4_if([$3], [], [ax_cxx_compile_cxx$1_required=true],
        [$3], [mandatory], [ax_cxx_compile_cxx$1_required=true],
        [$3], [optional], [ax_cxx_compile_cxx$1_required=false],
        [m4_fatal([invalid third argument `$3' to AX_CXX_COMPILE_STDCXX])])
  AC_LANG_PUSH([C++])dnl
  ac_success=no
  AC_CACHE_CHECK(whether $CXX supports C++$1 features by default,
  ax_cv_cxx_compile_cxx$1,
  [AC_COMPILE_IFELSE([AC_LANG_SOURCE([_AX_CXX_COMPILE_STDCXX_testbody_$1])],
    [ax_cv_cxx_compile_cxx$1=yes],
    [ax_cv_cxx_compile_cxx$1=no])])
  if test x$ax_cv_cxx_compile_cxx$1 = xyes; then
    ac_success=yes
  fi

  m4_if([$2], [noext], [], [dnl
  if test x$ac_success = xno; then
    for alternative in ${ax_cxx_compile_alternatives}; do
      switch="-std=gnu++${alternative}"
      cachevar=AS_TR_SH([ax_cv_cxx_compile_cxx$1_$switch])
      AC_CACHE_CHECK(whether $CXX supports C++$1 features with $switch,
                     $cachevar,
        [ac_save_CXX="$CXX"
         CXX="$CXX $switch"
         AC_COMPILE_IFELSE([AC_LANG_SOURCE([_AX_CXX_COMPILE_STDCXX_testbody_$1])],
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          [eval $cachevar=no])
         CXX="$ac_save_CXX"])
      if eval test x\$$cachevar = xyes; then
        CXX="$CXX $switch"
        if test -n "$CXXCPP" ; then
          CXXCPP="$CXXCPP $switch"
        fi
        ac_success=yes
        break
      fi
    done
  fi])

  m4_if([$2], [ext], [], [dnl
  if test x$ac_success = xno; then
    dnl HP's aCC needs +std=c++11 according to:
    dnl http://h21007.www2.hp.com/portal/download/files/unprot/aCxx/PDF_Release_Notes/769149-001.pdf
    dnl Cray's crayCC needs "-h std=c++11"
    for alternative in ${ax_cxx_compile_alternatives}; do
      for switch in -std=c++${alternative} +std=c++${alternative} "-h std=c++${alternative}"; do
        cachevar=AS_TR_SH([ax_cv_cxx_compile_cxx$1_$switch])
        AC_CACHE_CHECK(whether $CXX supports C++$1 features with $switch,
                       $cachevar,
          [ac_save_CXX="$CXX"
           CXX="$CXX $switch"
           AC_COMPILE_IFELSE([AC_LANG_SOURCE([_AX_CXX_COMPILE_STDCXX_testbody_$1])],
            [eval $cachevar=yes],
            [eval $cachevar=no])
           CXX="$ac_save_CXX"])
        if eval test x\$$cachevar = xyes; then
          CXX="$CXX $switch"
          if test -n "$CXXCPP" ; then
            CXXCPP="$CXXCPP $switch"
          fi
          ac_success=yes
          break
        fi
      done
      if test x$ac_success = xyes; then
        break
      fi
    done
  fi])
  AC_LANG_POP([C++])
  if test x$ax_cxx_compile_cxx$1_required = xtrue; then
    if test x$ac_success = xno; then
      AC_MSG_ERROR([*** A compiler with support for C++$1 language features is required.])
    fi
  fi
  if test x$ac_success = xno; then
    HAVE_CXX$1=0
    AC_MSG_NOTICE([No compiler with C++$1 support was found])
  else
    HAVE_CXX$1=1
    AC_DEFINE(HAVE_CXX$1,1,
              [define if the compiler supports basic C++$1 syntax])
  fi
  AC_SUBST(HAVE_CXX$1)
  m4_if([$1], [17], [AC_MSG_WARN([C++17 is not yet standardized, so the checks may change in incompatible ways anytime])])
])
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m4trace:configure.ac:86: -1- AX_REQUIRE_DEFINED([AX_APPEND_COMPILE_FLAGS])
m4trace:configure.ac:86: -1- AX_REQUIRE_DEFINED([AX_APPEND_FLAG])
m4trace:configure.ac:86: -1- AX_REQUIRE_DEFINED([AX_CHECK_COMPILE_FLAG])
m4trace:configure.ac:86: -1- AX_CHECK_COMPILE_FLAG([-Werror=unknown-warning-option], [
        ax_compiler_flags_test="-Werror=unknown-warning-option"
    ], [
        ax_compiler_flags_test=""
    ])
m4trace:configure.ac:86: -1- AX_CHECK_COMPILE_FLAG([-Wno-suggest-attribute=format], [
        ax_compiler_no_suggest_attribute_flags="-Wno-suggest-attribute=format"
    ], [
        ax_compiler_no_suggest_attribute_flags=""
    ])
m4trace:configure.ac:86: -1- AX_APPEND_COMPILE_FLAGS([ dnl
        -fno-strict-aliasing dnl
         dnl
       -pedantic dnl
       -Wold-style-cast dnl
    ], [WARNING_CXXFLAGS], [$ax_compiler_flags_test])
m4trace:configure.ac:86: -1- AX_REQUIRE_DEFINED([AX_CHECK_COMPILE_FLAG])
m4trace:configure.ac:86: -1- AX_REQUIRE_DEFINED([AX_APPEND_FLAG])
m4trace:configure.ac:86: -1- AX_CHECK_COMPILE_FLAG([$flag], [AX_APPEND_FLAG([$flag], [WARNING_CXXFLAGS])], [], [$ax_compiler_flags_test], [])
m4trace:configure.ac:86: -1- AX_APPEND_FLAG([$flag], [WARNING_CXXFLAGS])
m4trace:configure.ac:86: -1- AX_APPEND_COMPILE_FLAGS([ dnl
            -Wall dnl
            -Wextra dnl
            -Wundef dnl
            -Wwrite-strings dnl
            -Wpointer-arith dnl
            -Wmissing-declarations dnl
            -Wredundant-decls dnl
            -Wno-unused-parameter dnl
            -Wno-missing-field-initializers dnl
            -Wformat=2 dnl
            -Wcast-align dnl
            -Wformat-nonliteral dnl
            -Wformat-security dnl
            -Wsign-compare dnl
            -Wstrict-aliasing dnl
            -Wshadow dnl
            -Winline dnl
            -Wpacked dnl
            -Wmissing-format-attribute dnl
            -Wmissing-noreturn dnl
            -Winit-self dnl
            -Wredundant-decls dnl
            -Wmissing-include-dirs dnl
            -Wunused-but-set-variable dnl
            -Warray-bounds dnl
            -Wreturn-type dnl
            -Wno-overloaded-virtual dnl
            -Wswitch-enum dnl
            -Wswitch-default dnl
             dnl
             dnl
             dnl
             dnl
        ], [WARNING_CXXFLAGS], [$ax_compiler_flags_test])
m4trace:configure.ac:86: -1- AX_REQUIRE_DEFINED([AX_CHECK_COMPILE_FLAG])
m4trace:configure.ac:86: -1- AX_REQUIRE_DEFINED([AX_APPEND_FLAG])
m4trace:configure.ac:86: -1- AX_CHECK_COMPILE_FLAG([$flag], [AX_APPEND_FLAG([$flag], [WARNING_CXXFLAGS])], [], [$ax_compiler_flags_test], [])
m4trace:configure.ac:86: -1- AX_APPEND_FLAG([$flag], [WARNING_CXXFLAGS])
m4trace:configure.ac:86: -1- AX_APPEND_FLAG([-Werror], [WARNING_CXXFLAGS])
m4trace:configure.ac:86: -1- AX_APPEND_COMPILE_FLAGS([ dnl
            [$ax_compiler_no_suggest_attribute_flags] dnl
        ], [WARNING_CXXFLAGS], [$ax_compiler_flags_test])
m4trace:configure.ac:86: -1- AX_REQUIRE_DEFINED([AX_CHECK_COMPILE_FLAG])
m4trace:configure.ac:86: -1- AX_REQUIRE_DEFINED([AX_APPEND_FLAG])
m4trace:configure.ac:86: -1- AX_CHECK_COMPILE_FLAG([$flag], [AX_APPEND_FLAG([$flag], [WARNING_CXXFLAGS])], [], [$ax_compiler_flags_test], [])
m4trace:configure.ac:86: -1- AX_APPEND_FLAG([$flag], [WARNING_CXXFLAGS])
m4trace:configure.ac:86: -1- AX_APPEND_COMPILE_FLAGS([-Wno-error=$(AS_ECHO([$flag]) | $SED 's/^-Wno-//')], [WARNING_CXXFLAGS], [$ax_compiler_flags_test])
m4trace:configure.ac:86: -1- AX_REQUIRE_DEFINED([AX_CHECK_COMPILE_FLAG])
m4trace:configure.ac:86: -1- AX_REQUIRE_DEFINED([AX_APPEND_FLAG])
m4trace:configure.ac:86: -1- AX_CHECK_COMPILE_FLAG([$flag], [AX_APPEND_FLAG([$flag], [WARNING_CXXFLAGS])], [], [$ax_compiler_flags_test], [])
m4trace:configure.ac:86: -1- AX_APPEND_FLAG([$flag], [WARNING_CXXFLAGS])
m4trace:configure.ac:86: -1- m4_pattern_allow([^WARNING_CXXFLAGS$])
m4trace:configure.ac:86: -1- m4_pattern_allow([^WARNING_CXXFLAGS$])
m4trace:configure.ac:102: -1- m4_pattern_allow([^ENABLE_STATS$])
m4trace:configure.ac:115: -1- m4_pattern_allow([^BACKWARD_ENABLED$])
m4trace:configure.ac:122: -1- AX_CODE_COVERAGE([])
m4trace:configure.ac:122: -1- AM_CONDITIONAL([CODE_COVERAGE_ENABLED], [test x$enable_code_coverage = xyes])
m4trace:configure.ac:122: -1- m4_pattern_allow([^CODE_COVERAGE_ENABLED_TRUE$])
m4trace:configure.ac:122: -1- m4_pattern_allow([^CODE_COVERAGE_ENABLED_FALSE$])
m4trace:configure.ac:122: -1- _AM_SUBST_NOTMAKE([CODE_COVERAGE_ENABLED_TRUE])
m4trace:configure.ac:122: -1- _AM_SUBST_NOTMAKE([CODE_COVERAGE_ENABLED_FALSE])
m4trace:configure.ac:122: -1- m4_pattern_allow([^CODE_COVERAGE_ENABLED$])
m4trace:configure.ac:122: -1- m4_pattern_allow([^GCOV$])
m4trace:configure.ac:122: -1- m4_pattern_allow([^GCOV$])
m4trace:configure.ac:122: -1- m4_pattern_allow([^LCOV$])
m4trace:configure.ac:122: -1- m4_pattern_allow([^GENHTML$])
m4trace:configure.ac:122: -1- m4_pattern_allow([^CODE_COVERAGE_CPPFLAGS$])
m4trace:configure.ac:122: -1- m4_pattern_allow([^CODE_COVERAGE_CFLAGS$])
m4trace:configure.ac:122: -1- m4_pattern_allow([^CODE_COVERAGE_CXXFLAGS$])
m4trace:configure.ac:122: -1- m4_pattern_allow([^CODE_COVERAGE_LIBS$])
m4trace:configure.ac:122: -1- m4_pattern_allow([^CODE_COVERAGE_LDFLAGS$])
m4trace:configure.ac:122: -1- m4_pattern_allow([^CODE_COVERAGE_RULES$])
m4trace:configure.ac:122: -1- _AM_SUBST_NOTMAKE([CODE_COVERAGE_RULES])
m4trace:configure.ac:125: -1- AX_CHECK_HPCOMBI([])
m4trace:configure.ac:125: -1- _m4_warn([cross], [cannot check for file existence when cross compiling], [./lib/autoconf/general.m4:3008: AC_CHECK_FILE is expanded from...
lib/m4sugar/m4sh.m4:697: AS_IF is expanded from...
m4/ax_check_hpcombi.m4:20: AX_CHECK_HPCOMBI is expanded from...
configure.ac:125: the top level])
m4trace:configure.ac:125: -1- AX_COMPARE_VERSION([$FOUND_HPCOMBI], [ge], [$MIN_HPCOMBI_VERSION], [], [AC_MSG_WARN([the incorrect version of HPCombi is present, HPCombi is disabled]) 
                            enable_hpcombi=no])
m4trace:configure.ac:125: -2- AX_APPEND_FLAG([-mavx], [ax_hpcombi_cxxflags_variable])
m4trace:configure.ac:125: -1- AX_CHECK_COMPILE_FLAG([-mavx], [
if test ${HPCOMBI_CXXFLAGS+y}
then :
  
  case " $HPCOMBI_CXXFLAGS " in @%:@(
  *" -mavx "*) :
    { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: : HPCOMBI_CXXFLAGS already contains -mavx"; } >&5
  (: HPCOMBI_CXXFLAGS already contains -mavx) 2>&5
  ac_status=$?
  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
  test $ac_status = 0; } ;; @%:@(
  *) :
    
     as_fn_append HPCOMBI_CXXFLAGS " -mavx"
     { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: : HPCOMBI_CXXFLAGS=\"\$HPCOMBI_CXXFLAGS\""; } >&5
  (: HPCOMBI_CXXFLAGS="$HPCOMBI_CXXFLAGS") 2>&5
  ac_status=$?
  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
  test $ac_status = 0; }
     ;;
esac
  
else case e in @%:@(
  e) 
  HPCOMBI_CXXFLAGS=-mavx
  { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: : HPCOMBI_CXXFLAGS=\"\$HPCOMBI_CXXFLAGS\""; } >&5
  (: HPCOMBI_CXXFLAGS="$HPCOMBI_CXXFLAGS") 2>&5
  ac_status=$?
  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
  test $ac_status = 0; }
   ;;
esac
fi
], [AC_MSG_WARN([flag -mavx not supported, HPCombi is disabled])
                              enable_hpcombi=no])
m4trace:configure.ac:125: -2- AX_APPEND_FLAG([-flax-vector-conversions], [ax_hpcombi_cxxflags_variable])
m4trace:configure.ac:125: -1- AX_CHECK_COMPILE_FLAG([-flax-vector-conversions], [
if test ${HPCOMBI_CXXFLAGS+y}
then :
  
  case " $HPCOMBI_CXXFLAGS " in @%:@(
  *" -flax-vector-conversions "*) :
    { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: : HPCOMBI_CXXFLAGS already contains -flax-vector-conversions"; } >&5
  (: HPCOMBI_CXXFLAGS already contains -flax-vector-conversions) 2>&5
  ac_status=$?
  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
  test $ac_status = 0; } ;; @%:@(
  *) :
    
     as_fn_append HPCOMBI_CXXFLAGS " -flax-vector-conversions"
     { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: : HPCOMBI_CXXFLAGS=\"\$HPCOMBI_CXXFLAGS\""; } >&5
  (: HPCOMBI_CXXFLAGS="$HPCOMBI_CXXFLAGS") 2>&5
  ac_status=$?
  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
  test $ac_status = 0; }
     ;;
esac
  
else case e in @%:@(
  e) 
  HPCOMBI_CXXFLAGS=-flax-vector-conversions
  { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: : HPCOMBI_CXXFLAGS=\"\$HPCOMBI_CXXFLAGS\""; } >&5
  (: HPCOMBI_CXXFLAGS="$HPCOMBI_CXXFLAGS") 2>&5
  ac_status=$?
  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
  test $ac_status = 0; }
   ;;
esac
fi
], [AC_MSG_WARN([flag -flax-vector-conversions not supported, HPCombi is disabled])
                               enable_hpcombi=no])
m4trace:configure.ac:125: -1- m4_pattern_allow([^HAVE_X86INTRIN_H$])
m4trace:configure.ac:125: -1- CHECK_INTRINSIC([_mm_blendv_epi8], [__m128i{},__m128i{},__m128i{}])
m4trace:configure.ac:125: -1- CHECK_INTRINSIC([_mm_cmpeq_epi8], [__m128i{},__m128i{}])
m4trace:configure.ac:125: -1- CHECK_INTRINSIC([_mm_cmpestri], [__m128i{},1,__m128i{},1,1])
m4trace:configure.ac:125: -1- CHECK_INTRINSIC([_mm_cmpestrm], [__m128i{},1,__m128i{},1,1])
m4trace:configure.ac:125: -1- CHECK_INTRINSIC([_mm_cmplt_epi8], [__m128i{},__m128i{}])
m4trace:configure.ac:125: -1- CHECK_INTRINSIC([_mm_extract_epi64], [__m128i{},1])
m4trace:configure.ac:125: -1- CHECK_INTRINSIC([_mm_max_epi8], [__m128i{},__m128i{}])
m4trace:configure.ac:125: -1- CHECK_INTRINSIC([_mm_max_epu8], [__m128i{},__m128i{}])
m4trace:configure.ac:125: -1- CHECK_INTRINSIC([_mm_min_epi8], [__m128i{},__m128i{}])
m4trace:configure.ac:125: -1- CHECK_INTRINSIC([_mm_min_epu8], [__m128i{},__m128i{}])
m4trace:configure.ac:125: -1- CHECK_INTRINSIC([_mm_movemask_epi8], [__m128i{}])
m4trace:configure.ac:125: -1- CHECK_INTRINSIC([_mm_popcnt_u32], [{}])
m4trace:configure.ac:125: -1- CHECK_INTRINSIC([_mm_set_epi64x], [1,1])
m4trace:configure.ac:125: -1- CHECK_INTRINSIC([_mm_shuffle_epi8], [__m128i{},__m128i{}])
m4trace:configure.ac:125: -1- CHECK_INTRINSIC([_mm_slli_epi32], [__m128i{},1])
m4trace:configure.ac:125: -1- m4_pattern_allow([^HPCOMBI_ENABLED$])
m4trace:configure.ac:125: -1- AM_CONDITIONAL([LIBSEMIGROUPS_HPCOMBI_ENABLED], [test "x$enable_hpcombi" = xyes])
m4trace:configure.ac:125: -1- m4_pattern_allow([^LIBSEMIGROUPS_HPCOMBI_ENABLED_TRUE$])
m4trace:configure.ac:125: -1- m4_pattern_allow([^LIBSEMIGROUPS_HPCOMBI_ENABLED_FALSE$])
m4trace:configure.ac:125: -1- _AM_SUBST_NOTMAKE([LIBSEMIGROUPS_HPCOMBI_ENABLED_TRUE])
m4trace:configure.ac:125: -1- _AM_SUBST_NOTMAKE([LIBSEMIGROUPS_HPCOMBI_ENABLED_FALSE])
m4trace:configure.ac:125: -1- AM_CONDITIONAL([HPCOMBI_CONSTEXPR_FUN_ARGS], [test "x$hpcombi_constexpr_fun_args" = xyes])
m4trace:configure.ac:125: -1- m4_pattern_allow([^HPCOMBI_CONSTEXPR_FUN_ARGS_TRUE$])
m4trace:configure.ac:125: -1- m4_pattern_allow([^HPCOMBI_CONSTEXPR_FUN_ARGS_FALSE$])
m4trace:configure.ac:125: -1- _AM_SUBST_NOTMAKE([HPCOMBI_CONSTEXPR_FUN_ARGS_TRUE])
m4trace:configure.ac:125: -1- _AM_SUBST_NOTMAKE([HPCOMBI_CONSTEXPR_FUN_ARGS_FALSE])
m4trace:configure.ac:125: -2- m4_pattern_allow([^HPCOMBI_CXXFLAGS$])
m4trace:configure.ac:128: -1- AX_CHECK_FMT([])
m4trace:configure.ac:128: -1- m4_pattern_allow([^FMT_ENABLED$])
m4trace:configure.ac:128: -1- PKG_CHECK_MODULES([FMT], [fmt >= $MIN_FMT_VERSION])
m4trace:configure.ac:128: -1- PKG_PROG_PKG_CONFIG
m4trace:configure.ac:128: -1- m4_pattern_forbid([^_?PKG_[A-Z_]+$])
m4trace:configure.ac:128: -1- m4_pattern_allow([^PKG_CONFIG(_(PATH|LIBDIR|SYSROOT_DIR|ALLOW_SYSTEM_(CFLAGS|LIBS)))?$])
m4trace:configure.ac:128: -1- m4_pattern_allow([^PKG_CONFIG_(DISABLE_UNINSTALLED|TOP_BUILD_DIR|DEBUG_SPEW)$])
m4trace:configure.ac:128: -1- m4_pattern_allow([^PKG_CONFIG$])
m4trace:configure.ac:128: -1- m4_pattern_allow([^PKG_CONFIG_PATH$])
m4trace:configure.ac:128: -1- m4_pattern_allow([^PKG_CONFIG_LIBDIR$])
m4trace:configure.ac:128: -1- m4_pattern_allow([^PKG_CONFIG$])
m4trace:configure.ac:128: -1- m4_pattern_allow([^FMT_CFLAGS$])
m4trace:configure.ac:128: -1- m4_pattern_allow([^FMT_LIBS$])
m4trace:configure.ac:128: -1- PKG_CHECK_EXISTS([fmt >= $MIN_FMT_VERSION], [pkg_cv_[]FMT_CFLAGS=`$PKG_CONFIG --[]cflags "fmt >= $MIN_FMT_VERSION" 2>/dev/null`
		      test "x$?" != "x0" && pkg_failed=yes ], [pkg_failed=yes])
m4trace:configure.ac:128: -1- PKG_CHECK_EXISTS([fmt >= $MIN_FMT_VERSION], [pkg_cv_[]FMT_LIBS=`$PKG_CONFIG --[]libs "fmt >= $MIN_FMT_VERSION" 2>/dev/null`
		      test "x$?" != "x0" && pkg_failed=yes ], [pkg_failed=yes])
m4trace:configure.ac:128: -1- _PKG_SHORT_ERRORS_SUPPORTED
m4trace:configure.ac:128: -1- m4_pattern_allow([^FMT_CFLAGS$])
m4trace:configure.ac:128: -1- m4_pattern_allow([^fmt_PCDEP$])
m4trace:configure.ac:128: -1- AM_CONDITIONAL([LIBSEMIGROUPS_WITH_INTERNAL_FMT], [test "x$enable_fmt" = xyes && test "x$with_external_fmt" != xyes])
m4trace:configure.ac:128: -1- m4_pattern_allow([^LIBSEMIGROUPS_WITH_INTERNAL_FMT_TRUE$])
m4trace:configure.ac:128: -1- m4_pattern_allow([^LIBSEMIGROUPS_WITH_INTERNAL_FMT_FALSE$])
m4trace:configure.ac:128: -1- _AM_SUBST_NOTMAKE([LIBSEMIGROUPS_WITH_INTERNAL_FMT_TRUE])
m4trace:configure.ac:128: -1- _AM_SUBST_NOTMAKE([LIBSEMIGROUPS_WITH_INTERNAL_FMT_FALSE])
m4trace:configure.ac:132: -1- AX_CHECK_EIGEN([])
m4trace:configure.ac:132: -1- m4_pattern_allow([^EIGEN_ENABLED$])
m4trace:configure.ac:132: -1- PKG_CHECK_MODULES([EIGEN3], [eigen3 >= $MIN_EIGEN_VERSION])
m4trace:configure.ac:132: -1- m4_pattern_allow([^EIGEN3_CFLAGS$])
m4trace:configure.ac:132: -1- m4_pattern_allow([^EIGEN3_LIBS$])
m4trace:configure.ac:132: -1- PKG_CHECK_EXISTS([eigen3 >= $MIN_EIGEN_VERSION], [pkg_cv_[]EIGEN3_CFLAGS=`$PKG_CONFIG --[]cflags "eigen3 >= $MIN_EIGEN_VERSION" 2>/dev/null`
		      test "x$?" != "x0" && pkg_failed=yes ], [pkg_failed=yes])
m4trace:configure.ac:132: -1- PKG_CHECK_EXISTS([eigen3 >= $MIN_EIGEN_VERSION], [pkg_cv_[]EIGEN3_LIBS=`$PKG_CONFIG --[]libs "eigen3 >= $MIN_EIGEN_VERSION" 2>/dev/null`
		      test "x$?" != "x0" && pkg_failed=yes ], [pkg_failed=yes])
m4trace:configure.ac:132: -1- _PKG_SHORT_ERRORS_SUPPORTED
m4trace:configure.ac:132: -1- m4_pattern_allow([^EIGEN3_CFLAGS$])
m4trace:configure.ac:132: -1- m4_pattern_allow([^eigen_PCDEP$])
m4trace:configure.ac:132: -1- AM_CONDITIONAL([LIBSEMIGROUPS_WITH_INTERNAL_EIGEN], [test "x$enable_eigen" = xyes && test "x$with_external_eigen" != xyes])
m4trace:configure.ac:132: -1- m4_pattern_allow([^LIBSEMIGROUPS_WITH_INTERNAL_EIGEN_TRUE$])
m4trace:configure.ac:132: -1- m4_pattern_allow([^LIBSEMIGROUPS_WITH_INTERNAL_EIGEN_FALSE$])
m4trace:configure.ac:132: -1- _AM_SUBST_NOTMAKE([LIBSEMIGROUPS_WITH_INTERNAL_EIGEN_TRUE])
m4trace:configure.ac:132: -1- _AM_SUBST_NOTMAKE([LIBSEMIGROUPS_WITH_INTERNAL_EIGEN_FALSE])
m4trace:configure.ac:137: -1- AC_DEFUN([CHECK_COMPILER_BUILTIN], [AC_MSG_CHECKING([for $1])
    AC_LINK_IFELSE(
        [AC_LANG_PROGRAM(
            [[]],
            [$1[($2)];
            ]
        )],
        [AS_VAR_SET([[have_]$1], [yes])],
        [AS_VAR_SET([[have_]$1], [no])]
        )
    AC_MSG_RESULT(AS_VAR_GET([[have_]$1]))
    AS_IF([test yes = AS_VAR_GET([[have_]$1])],
        [AC_DEFINE_UNQUOTED(AS_TR_CPP([HAVE_]$1), 1,
            [Define to 1 if the system has the `]$1[' built-in function])], []
        )])
m4trace:configure.ac:154: -1- CHECK_COMPILER_BUILTIN([__builtin_popcountl], [0])
m4trace:configure.ac:154: -1- m4_pattern_allow([^HAVE___BUILTIN_POPCOUNTL$])
m4trace:configure.ac:155: -1- CHECK_COMPILER_BUILTIN([__builtin_clzll], [0])
m4trace:configure.ac:155: -1- m4_pattern_allow([^HAVE___BUILTIN_CLZLL$])
m4trace:configure.ac:171: -1- m4_pattern_allow([^USE_POPCNT$])
m4trace:configure.ac:189: -1- m4_pattern_allow([^USE_CLZLL$])
m4trace:configure.ac:194: -1- m4_pattern_allow([^LIB@&t@OBJS$])
m4trace:configure.ac:194: -1- m4_pattern_allow([^LTLIBOBJS$])
m4trace:configure.ac:194: -1- AM_CONDITIONAL([am__EXEEXT], [test -n "$EXEEXT"])
m4trace:configure.ac:194: -1- m4_pattern_allow([^am__EXEEXT_TRUE$])
m4trace:configure.ac:194: -1- m4_pattern_allow([^am__EXEEXT_FALSE$])
m4trace:configure.ac:194: -1- _AM_SUBST_NOTMAKE([am__EXEEXT_TRUE])
m4trace:configure.ac:194: -1- _AM_SUBST_NOTMAKE([am__EXEEXT_FALSE])
m4trace:configure.ac:194: -1- _AC_AM_CONFIG_HEADER_HOOK(["$ac_file"])
m4trace:configure.ac:194: -1- _AM_OUTPUT_DEPENDENCY_COMMANDS
m4trace:configure.ac:194: -1- AM_RUN_LOG([cd "$am_dirpart" \
      && sed -e '/# am--include-marker/d' "$am_filepart" \
        | $MAKE -f - am--depfiles])
m4trace:configure.ac:194: -1- _LT_PROG_LTMAIN
