#							-*- shell-script -*-
#
# Copyright by The HDF Group.
# Copyright by the Board of Trustees of the University of Illinois.
# All rights reserved.
#
# This file is part of HDF5.  The full HDF5 copyright notice, including
# terms governing use, modification, and redistribution, is contained in
# the COPYING file, which can be found at the root of the source code
# distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.
# If you do not have access to either file, you may request a copy from
# help@hdfgroup.org.


# This file should be sourced into configure if the compiler is the
# GNU g95/gfortran compiler or a derivative.  It is careful not to do anything
# if the compiler is not GNU; otherwise `f9x_flags_set' is set to `yes'
#

# Get the compiler version in a way that works for GNU fortran
# gfortran unless a compiler version is already known
#
#   f9x_vendor:    The compiler name: gfortran
#   f9x_version:   Version number: 5.0-2, 5.2-2
#
if test X = "X$f9x_flags_set"; then
    f9x_version="`$FC $FCFLAGS $H5_FCFLAGS -v 2>&1 |grep 'gcc version' |\
	        sed 's/.*gcc version \([-a-z0-9\.]*\).*/\1/'`"
    if test X != "X$f9x_version"; then
#        is_mpi="`$FC $FCFLAGS $H5_FCFLAGS -help 2>&1 |grep 'link MPI'`"
        f9x_vendor=`echo $f9x_version |sed 's/\([a-z]*\).*/\1/'`
        f9x_version=`echo $f9x_version |sed 's/[-a-z]//g'`
        if test X = "X$f9x_vendor" -a X != "X$f9x_version"; then
            f9x_vendor=gfortran
        fi
        if test "-" != "$f9x_vendor-$f9x_version"; then
            echo "compiler '$FC' is GNU $f9x_vendor-$f9x_version"
        fi

        # Some version numbers
        f9x_vers_major=`echo $f9x_version | cut -f1 -d.`
        f9x_vers_minor=`echo $f9x_version | cut -f2 -d.`
        f9x_vers_patch=`echo $f9x_version | cut -f3 -d.`
        test -n "$f9x_vers_major" || f9x_vers_major=0
        test -n "$f9x_vers_minor" || f9x_vers_minor=0
        test -n "$f9x_vers_patch" || f9x_vers_patch=0
        f9x_vers_all=`expr $f9x_vers_major '*' 1000000 + $f9x_vers_minor '*' 1000 + $f9x_vers_patch`
    fi
fi

# Common GNU flags for various situations
if test "X-gfortran" = "X-$f9x_vendor"; then
    # Insert section about version specific problems from gnu-flags here, if
    # necessary.

    arch=
    # Architecture-specific flags
    # Nothing currently. (Uncomment code below and modify to add any)
    #case "$host_os-$host_cpu" in
    #    *-i686)
    #        arch="-march=i686"
    #        ;;
    #esac

    # Host-specific flags
    # Nothing currently. (Uncomment code below and modify to add any)
    #case "`hostname`" in
    #    sleipnir.ncsa.uiuc.edu)
    #        arch="$arch -pipe"
    #        ;;
    #esac

    # General
    FC_BASENAME=gfortran
    F9XSUFFIXFLAG=""
    FSEARCH_DIRS=""
    H5_FCFLAGS="$H5_FCFLAGS -pedantic -Wall -Wextra -Wunderflow -Wimplicit-interface -Wsurprising"

    # Turn off warnings for passing non-ANSI types to BIND().
    # We pass a lot of hid_t, etc. types so this generates a LOT of spurious warnings.
    H5_FCFLAGS="$H5_FCFLAGS -Wno-c-binding-type"

    # Production
    PROD_FCFLAGS=

    # Debug
    DEBUG_FCFLAGS="-fbounds-check"

    # Symbols
    SYMBOLS_FCFLAGS="-g"
    NO_SYMBOLS_FCFLAGS="-s"

    # Profiling
    PROFILE_FCFLAGS="-pg"

    # Optimization
    HIGH_OPT_FCFLAGS="-O2"
    DEBUG_OPT_FCFLAGS="-O0"
    NO_OPT_FCFLAGS="-O0"

    # Flags are set
    f9x_flags_set=yes
fi

# Clear f9x info if no flags set
if test "X-$f9x_flags_set" = "X-"; then
  f9x_vendor=
  f9x_version=
fi

