# flags.at -- libtool passing of flags             -*- Autotest -*-
#
#   Copyright (C) 2009-2019, 2021-2025 Free Software Foundation, Inc.
#
#   This file is part of GNU Libtool.
#
# GNU Libtool is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License as
# published by the Free Software Foundation; either version 2 of
# the License, or (at your option) any later version.
#
# GNU Libtool is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with GNU Libtool.  If not, see <https://www.gnu.org/licenses/>.
####

m4_foreach([lt_tag], [CC, CXX, F77, FC, GCJ],
[AT_SETUP([passing lt_tag flags through libtool])
AT_KEYWORDS([libtool])
LT_AT_TAG(m4_defn([lt_tag]))

case $host_os in
  # FIXME: Locate shared version of gcc library for NetBSD.
  netbsd*)
    if test "CXX" = "lt_tag"; then
      AT_SKIP_IF([:])
    fi
    ;;
  *)
    LDFLAGS="$LDFLAGS -no-undefined"
    ;;
esac
eval "`$LIBTOOL --config | $EGREP '^(FGREP)='`"

m4_case(lt_tag,
[CC], [AT_DATA([a.c],
[[int main () { return 0; }
]])
compile="$CC $CPPFLAGS $CFLAGS" link="$CC $CFLAGS $LDFLAGS" source=a.c
],
[CXX], [AT_DATA([a.cpp],
[[int main () { return 0; }
]])
compile="$CXX $CPPFLAGS $CXXFLAGS" link="$CXX $CXXFLAGS $LDFLAGS" source=a.cpp
],
[F77], [AT_DATA([a.f],
[[      program main
      end
]])
compile="$F77 $FFLAGS" link="$F77 $FFLAGS $LDFLAGS" source=a.f
],
[FC], [AT_DATA([a.f90],
[[      program main
      end
]])
compile="$FC $FCFLAGS" link="$FC $FCFLAGS $LDFLAGS" source=a.f90
],
[GCJ], [AT_DATA([a.java],
[[class a {}
]])
compile="$GCJ $GCJFLAGS" link="$GCJ $GCJFLAGS $LDFLAGS" source=a.java
])

# Linker flags are not passed to the archiver, so don't test static libraries.
if $LIBTOOL --features | $GREP 'enable shared libraries'; then
  library_and_module='library.la "module.la -module -avoid-version"'
else
  library_and_module=
fi

eval "`$LIBTOOL --tag=lt_tag --config | $EGREP '^(wl|archive_cmds)='`"

AT_CHECK([$LIBTOOL --tag=lt_tag --mode=compile $compile -c $source],
	 [], [ignore], [ignore])

# Linker flags are prefixed with $wl iff they are passed to the
# compiler driver, instead of directly to the linker.
case $archive_cmds in
*\$LD*\$linker_flags*) maybe_wl= compiler_flags_in_liblink=false ;;
*) maybe_wl=$wl compiler_flags_in_liblink=: ;;
esac

for flag in -Wc, -Wl, '-Xcompiler ' '-Xlinker '; do
  case $flag in
  -Wc, | -Xcompiler\ )
    AT_CHECK([$LIBTOOL -n --tag=lt_tag --mode=compile $compile ]dnl
	     [$flag-foo -c $source], [], [stdout], [ignore])
    AT_CHECK([$FGREP " -foo" stdout], [], [ignore])
    flag_prefix_prog=
    flag_prefix_lib=
    flags_in_liblink=$compiler_flags_in_liblink
    ;;
  -Wl, | -Xlinker\ )
    flag_prefix_prog=$wl
    flag_prefix_lib=$maybe_wl
    flags_in_liblink=:
    ;;
  esac

  AT_CHECK([$LIBTOOL -n --tag=lt_tag --mode=link $link ]dnl
	   [-o program$EXEEXT a.lo $flag-foo], [], [stdout], [ignore])
  AT_CHECK([$FGREP " $flag_prefix_prog-foo" stdout], [], [ignore])

  eval set x "$library_and_module"
  for output
  do
    test x = "$output" && continue
    AT_CHECK([$LIBTOOL -n --tag=lt_tag --mode=link $link ]dnl
	     [-o $output a.lo -rpath /nowhere $flag-foo], [], [stdout], [ignore])
    if $flags_in_liblink; then
      AT_CHECK([$FGREP " $flag_prefix_lib-foo" stdout], [], [ignore])
    else
      AT_CHECK([$FGREP " $flag_prefix_lib-foo" stdout], [1])
    fi
  done
done

AT_CLEANUP
])dnl m4_foreach(tag)