tests/lt_dlopen.at

# lt_dlopen.at -- test libltdl functionality                -*- Autotest -*-
#
#   Copyright (C) 2009, 2011-2019, 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/>.
####

AT_SETUP([lt_dlopen error messages])
AT_KEYWORDS([libltdl])

# The bug is not fixed:
AT_XFAIL_IF([:])

# This test only works if the system allows undefined symbols.
eval `$LIBTOOL --config | $GREP '^allow_undefined_flag='`
AT_CHECK([test unsupported != "$allow_undefined_flag" || exit 77])

AT_DATA([main.c],
[[#include <ltdl.h>
#include <stdio.h>

int
main (int argc, char* argv[])
{
  int err = 0;
  lt_dlhandle plugin_handle;

  if (argc < 2)
    {
      fprintf (stderr, "usage: %s plugin\n", argv[0]);
      return 1;
    }

  lt_dlinit ();
  plugin_handle = lt_dlopenext (argv[1]);
  if (NULL != plugin_handle)
    {
      printf ("plugin opened successfully!\n");
      lt_dlclose (plugin_handle);
    }
  else
    {
      printf ("plugin failed to open: %s\n", lt_dlerror());
      err = 1;
    }
  lt_dlexit ();
  return err;
}
]])

AT_DATA([good-plugin.c],
[[int foo;
int *i = &foo;
]])

AT_DATA([missing-symbol-plugin.c],
[[/* On systems that allow undefined symbols, this will compile,
     but the symbol "foo" won't be found at runtime */
extern int foo;
int *i = &foo;
]])

: ${LTDLINCL="-I$abs_top_srcdir/libltdl"}
: ${LIBLTDL="$abs_builddir/../libltdl/libltdlc.la"}

CPPFLAGS="$LTDLINCL $CPPFLAGS"
inst=`pwd`/inst
libdir=$inst/lib

AT_CHECK([$CC $CPPFLAGS $CFLAGS -c main.c], [], [ignore], [ignore])
for file in good-plugin.c missing-symbol-plugin.c; do
  AT_CHECK([$LIBTOOL --mode=compile $CC $CPPFLAGS $CFLAGS -c $file],
	   [], [ignore], [ignore])
done
AT_CHECK([$LIBTOOL --mode=link $CC $CFLAGS $LDFLAGS -o good-plugin.la -rpath $libdir ]dnl
	 [-module -avoid-version good-plugin.lo], [], [ignore], [ignore])
AT_CHECK([$LIBTOOL --mode=link $CC $CFLAGS $LDFLAGS -o missing-symbol-plugin.la -rpath $libdir]dnl
	 [-module -avoid-version missing-symbol-plugin.lo], [], [ignore], [ignore])

AT_CHECK([$LIBTOOL --mode=link $CC $CFLAGS $LDFLAGS -o main$EXEEXT main.$OBJEXT ]dnl
	 [-dlopen good-plugin.la -dlopen missing-symbol-plugin.la $LIBLTDL],
	 [], [ignore], [ignore])

LT_AT_EXEC_CHECK([./main], [], [ignore], [ignore], [./good-plugin.la])
LT_AT_EXEC_CHECK([./main], [1], [ignore], [stderr], [./missing-symbol-plugin.la])
AT_CHECK([$GREP 'missing symbol' stderr], [], [ignore])

AT_CLEANUP