# link-order.at -- ensure that library linking order matches  -*- Autotest -*-
#
#   Copyright (C) 2005, 2007-2008, 2011-2019, 2021-2025 Free Software
#   Foundation, Inc.
#   Written by Alexandre Oliva & Ralf Wildenhues, 2005
#
#   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/>.
####


AT_SETUP([Link order test])
AT_KEYWORDS([libtool])
eval `$LIBTOOL --config | $EGREP '^(hardcode_direct|hardcode_direct_absolute|shrext_cmds)='`
LDFLAGS="$LDFLAGS -no-undefined"

module=no
eval shared_ext=\"$shrext_cmds\"

prefix_old=`pwd`/old
prefix_new=`pwd`/new
mkdir src $prefix_old $prefix_new $prefix_old/lib $prefix_new/lib

AT_DATA(src/c.c,
[[int c = 1;
]])

$LIBTOOL --mode=compile $CC $CPPFLAGS $CFLAGS -c src/c.c -o src/c.lo
$LIBTOOL --mode=link $CC $CFLAGS $LDFLAGS -o src/libcee.la src/c.lo -rpath $prefix_old/lib
$LIBTOOL --mode=install cp src/libcee.la $prefix_old/lib/libcee.la

for i in old new; do
  rm -rf src
  mkdir src

  cat >src/a_$i.c <<EOF
/* w32 fun, MSVC needs to dllimport when using a shared library, so use
 * DLL_EXPORT to discriminate as that happens to coincide in this case.
 * gnu has auto import.
 */
#if defined _MSC_VER && defined DLL_EXPORT
#  define LIBCEE_SCOPE __declspec(dllimport)
#else
#  define LIBCEE_SCOPE extern
#endif
LIBCEE_SCOPE int c;
extern int b_$i();
int a_$i() { return c + b_$i(); }
EOF

  cat >src/b_$i.c <<EOF
/* w32 fun, MSVC needs to dllimport when using a shared library, so use
 * DLL_EXPORT to discriminate as that happens to coincide in this case.
 * gnu has auto import.
 */
#if defined _MSC_VER && defined DLL_EXPORT
#  define LIBCEE_SCOPE __declspec(dllimport)
#else
#  define LIBCEE_SCOPE extern
#endif
LIBCEE_SCOPE int c;
int b_$i() { return 1 + c; }
EOF

  prefix=`eval echo \\$prefix_$i`
  $LIBTOOL --mode=compile $CC $CPPFLAGS $CFLAGS -c src/a_$i.c -o src/a.lo
  $LIBTOOL --mode=compile $CC $CPPFLAGS $CFLAGS -c src/b_$i.c -o src/b.lo
  $LIBTOOL --mode=link $CC $CFLAGS $LDFLAGS -o src/libb.la src/b.lo \
      -L$prefix_old/lib -lcee -rpath $prefix/lib
  $LIBTOOL --mode=link $CC $CFLAGS $LDFLAGS -o src/liba.la src/a.lo \
      src/libb.la -L$prefix_old/lib -lcee -rpath $prefix/lib
  $LIBTOOL --mode=install cp src/libb.la $prefix/lib/libb.la
  AT_CHECK([$LIBTOOL --mode=install cp src/liba.la $prefix/lib/liba.la],
	[0], [stdout], [stderr])
done

$LIBTOOL --mode=clean rm -f src/libb.la
$LIBTOOL --mode=clean rm -f src/liba.la

case $host_os in
aix* | interix*) ;;  # These systems have different path syntax
*)
  # Do not error if we do not relink (e.g. static-only systems)
  case $hardcode_direct$hardcode_direct_absolute in
  yesno)
    AT_CHECK([if $EGREP relinking stderr; then
         $EGREP " .*/new/lib/libb$shared_ext .*/old/lib/libcee$shared_ext" stdout
       else :; fi], [0], [ignore], [], [echo "wrong link order"])
    ;;
  *)
    AT_CHECK([if $EGREP relinking stderr; then
         $EGREP " -L.*/new/lib -lb -L.*/old/lib -lcee" stdout
       else :; fi], [0], [ignore], [], [echo "wrong link order"])
    ;;
  esac
  ;;
esac

for i in old new; do
  cat >src/main_$i.c <<EOF
extern int a_$i();
int main(void) { return a_$i() != 3; }
EOF

  prefix=`eval echo \\$prefix_$i`
  $LIBTOOL --mode=compile $CC $CPPFLAGS $CFLAGS -c src/main_$i.c -o src/main_$i.lo
  AT_CHECK($LIBTOOL --mode=link $CC $CFLAGS $LDFLAGS -o src/main_$i$EXEEXT src/main_$i.lo -L$prefix/lib -la,
	   [0], [ignore], [ignore])
  LT_AT_EXEC_CHECK([src/main_$i])
done

AT_CLEANUP