#                                                   -*- shell-script -*-
#
# This file is part of the HDF4 build script. It is processed shortly
# after configure starts and defines, among other things, flags for
# the various compilation modes.

#
# Prepend `$srcdir/config/intel-warnings/` to the filename suffix(es) given as
# subroutine argument(s), remove comments starting with # and ending
# at EOL, replace spans of whitespace (including newlines) with spaces,
# and re-emit the file(s) thus filtered on the standard output stream.
#
load_intel_arguments()
{
    set -- $(for arg; do
        sed 's,#.*$,,' $srcdir/config/intel-warnings/${arg}
    done)
    IFS=' ' echo "$*"
}

# Get the compiler version in a way that works for icc
# icc unless a compiler version is already known
#
#   cc_vendor:    The compiler name: icc
#   cc_version:   Version number: 8.0
#
if test X = "X$cc_flags_set"; then
    cc_version="`$CC $CFLAGS -V 2>&1 |grep 'Version'`"
    if test X != "X$cc_version"; then
        cc_vendor=icc
        cc_version=`echo $cc_version |sed 's/.*Version \([-a-z0-9\.\-]*\).*/\1/'`
        echo "compiler '$CC' is Intel $cc_vendor-$cc_version"

        # Some version numbers
        # Intel version numbers are of the form: "major.minor"
        cc_vers_major=`echo $cc_version | cut -f1 -d.`
        cc_vers_minor=`echo $cc_version | cut -f2 -d.`
        #cc_vers_patch=`echo $cc_version | cut -f2 -d.`
        test -n "$cc_vers_major" || cc_vers_major=0
        test -n "$cc_vers_minor" || cc_vers_minor=0
        test -n "$cc_vers_patch" || cc_vers_patch=0
        cc_vers_all=`expr $cc_vers_major '*' 1000000 + $cc_vers_minor '*' 1000 + $cc_vers_patch`
    fi
fi

# Common Intel flags for various situations
if test "X-icc" = "X-$cc_vendor"; then

    # -diag-disable=10441 disables the icc deprecation message
    CFLAGS="$CFLAGS -std=c99 -Wall -diag-disable=10441"
    CFLAGS="$CFLAGS -Wno-error=implicit-function-declaration"

    DEBUG_CFLAGS="-g"
    DEBUG_CPPFLAGS=
    PROD_CFLAGS="-O3"
    PROD_CPPFLAGS=
    PROFILE_CFLAGS="-pg"
    PROFILE_CPPFLAGS=

    # Add various general warning flags in intel-warnings.
    CFLAGS="$CFLAGS $(load_intel_arguments classic/general)"

    #############################
    # Version-specific warnings #
    #############################

    # intel >= 15
    if test $cc_vers_major -ge 15; then
        CFLAGS="$CFLAGS $(load_intel_arguments classic/15)"
    fi

    # intel >= 18
    if test $cc_vers_major -ge 18; then
        CFLAGS="$CFLAGS $(load_intel_arguments classic/18)"
    fi

    #################
    # Flags are set #
    #################
    cc_flags_set=yes
fi

# Clear cc info if no flags set
if test "X-$cc_flags_set" = "X-"; then
    cc_vendor=
    cc_version=
fi
