tests/need_lib_prefix.at

# need-lib-prefix.at -- test libltdl functionality            -*- Autotest -*-
#
#   Copyright (C) 2007-2008, 2010-2019, 2021-2025 Free Software
#   Foundation, Inc.
#   Written by Gary V. Vaughan, 2007
#
#   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([enforced lib prefix])
AT_KEYWORDS([libltdl libtool])

# Originally written to simulate a failure visible on systems
# that need a library prefix like 'lib', such as BeOS.  Currently
# the prefix is hardcoded as 'lib', so systems that require a
# different prefix skips the test.

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

typedef int fun (int);

static int errors = 0;

static void
complain (const char *msg)
{
  const char *errmsg = lt_dlerror ();
  fprintf (stderr, "%s", msg);
  if (errmsg)
    fprintf (stderr, ": %s\n", errmsg);
  else
    fprintf (stderr, ".\n");
  ++errors;
}

static lt_dlhandle
moduleopen (const char *filename)
{
  lt_dlhandle handle;

  handle = lt_dlopen (filename);
  if (!handle)
    {
      fprintf (stderr, "can't open the module %s!\n", filename);
      complain ("error was");
    }

  return handle;
}

static int
moduletest (lt_dlhandle handle)
{
  const lt_dlinfo *info = lt_dlgetinfo (handle);
  fun *f = (fun *) lt_dlsym (handle, "f");
  int *v = (int *) lt_dlsym (handle, "i");

  if (!f)
    {
      complain ("function 'f' not found");
      return 1;
    }
  if (!v)
    {
      complain ("variable 'i' not found");
      return 1;
    }
  printf ("%s: %d\n", info->name, f (*v));

  return 0;
}

int
main (int argc, char **argv)
{
  lt_dlhandle handle;

  LTDL_SET_PRELOADED_SYMBOLS();

  if (lt_dlinit() != 0)
    {
      fprintf (stderr, "error during initialization: %s\n", lt_dlerror());
      return 1;
    }

  if (lt_dlpreload_open (0, moduletest) != 0)
    complain ("error during preloading");

  if (lt_dlexit () != 0)
    complain ("error during exit");

  return (errors != 0);
}
]])

AT_DATA([foo1.c],
[[#define f foo1_LTX_f
#define i foo1_LTX_i
#ifdef __cplusplus
extern "C" {
#endif
int f (int x) { return x / 3; }
int i = 7;
#ifdef __cplusplus
}
#endif
]])

AT_DATA([foo2.c],
[[#define f libfoo2_LTX_f
#define i libfoo2_LTX_i
#ifdef __cplusplus
extern "C" {
#endif
int f (int x) { return (x * x) / 10; }
int i = 6;
#ifdef __cplusplus
}
#endif
]])

LT_AT_HOST_DATA([expout],
[[libfoo1: 2
libfoo2: 3
]])

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

# Skip this test when called from:
#    make distcheck DISTCHECK_CONFIGURE_FLAGS=--disable-ltdl-install
AT_CHECK([case $LIBLTDL in #(
 */_inst/lib/*) test -f "$LIBLTDL" || (exit 77) ;;
esac], [], [ignore])

CPPFLAGS="$LTDLINCL $CPPFLAGS"
LDFLAGS=$LDFLAGS

# Skip this test when libraries are not normally prefixed with lib.
# E.g., for MSVC and OS/2.
eval "`$LIBTOOL --config | $EGREP '^(libname_spec)='`"
name=
eval libname=\"$libname_spec\"
AT_CHECK([test lib = "$libname" || exit 77])

# Create our own libtool, forcing need_lib_prefix setting
$SED 's|^\(need_lib_prefix\)=.*$|\1=unknown|' $LIBTOOL > ./libtool
LIBTOOL="$SHELL ./libtool"

# Installation directory:
instdir=`pwd`/_inst

$CC $CPPFLAGS $CFLAGS -c main.c
for file in foo1 foo2; do
  $LIBTOOL --mode=compile $CC $CPPFLAGS $CFLAGS -c $file.c
done

AT_CHECK([$LIBTOOL --mode=link $CC -module -avoid-version $CFLAGS $LDFLAGS -o foo1.la foo1.lo -rpath $instdir/lib],
	 [], [ignore], [ignore])
AT_CHECK([$LIBTOOL --mode=link $CC -module -avoid-version $CFLAGS $LDFLAGS -o libfoo2.la foo2.lo -rpath $instdir/lib],
	 [], [ignore], [ignore])
AT_CHECK([$LIBTOOL --mode=link $CC $CFLAGS $LDFLAGS -o main$EXEEXT main.$OBJEXT -dlpreopen foo1.la -dlpreopen libfoo2.la $LIBLTDL],
          [], [ignore], [ignore])

LT_AT_NOINST_EXEC_CHECK([./main], [-dlopen foo1.la -dlopen libfoo2.la],
	      [], [expout], [])

# Install the libraries.
mkdir $instdir
mkdir $instdir/lib
$LIBTOOL --mode=install cp foo1.la $instdir/lib/foo1.la
$LIBTOOL --mode=install cp libfoo2.la $instdir/lib/libfoo2.la

# Install the binary
mkdir $instdir/bin
$LIBTOOL --mode=install cp main$EXEEXT $instdir/bin/main$EXEEXT

LT_AT_EXEC_CHECK([$instdir/bin/main], [], [expout], [])

AT_CLEANUP