tests/export.at

# export.at -- test symbol exports                           -*- Autotest -*-

#   Copyright (C) 2007-2008, 2011-2019, 2021-2025 Free Software
#   Foundation, Inc.
#   Written by Ralf Wildenhues, 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([Export test])
AT_KEYWORDS([libtool])

AT_CHECK([$LIBTOOL --features | $GREP 'disable shared libraries' && (exit 77)],
	 [1], [ignore])
AT_CHECK([eval `$LIBTOOL --config | $SED -n '/^archive_expsym_cmds=/,/^$/p'`
	  test -n "$archive_expsym_cmds" || echo false >can-hide
	  case $archive_expsym_cmds in
	  *-retain-symbols-file*) echo false >can-hide ;;
	  esac])
can_hide=:
test -s can-hide && can_hide=false

LDFLAGS="$LDFLAGS -no-undefined"
libdir=`pwd`/inst/lib
mkdir inst inst/lib

AT_DATA(a.c,
[[/* all kinds of data items */
#ifdef __cplusplus
extern "C" {
#endif

int v1;
static int v2;
int v3 = 0;
int v4 = 1;
extern const int v5, v6;
extern const char *v7;
extern const char v8[];
extern int (*const v12) (void);
const int v5 = 0;
const int v6 = 1;
const char* v7 = "\01foo";
const char v8[] = "\01bar";
int v9(void) { return v2 + 1; }
int (*v10) (void);
int (*v11) (void) = v9;
int (*const v12) (void) = v9;

typedef struct { int arr[1000]; } large;
large v13;
large v14 = { { 0 } };
large v15 = { { 1 } };

int w1 (void) { return 0; }

#ifdef __cplusplus
}
#endif
]])

AT_DATA(asyms,
[[v1
v3
v4
v5
v6
v7
v8
v9
v10
v11
v12
v13
v14
v15
]])

AT_DATA(main.c,
[[
/* w32 fun.  With GCC, you can have auto-import, which will work for
 * functions and non-const variables.  With MSVC, you have to explicitly
 * import all variables.  Depending on the amount of portability, you
 * need these annotations: LIBA_SCOPE for GCC, and also LIBA_SCOPE_VAR
 * for MSVC.  Of course you can merge both to one, this test only avoids
 * that in order to expose the auto-import feature on Cygwin.
 *
 * For users, it's best to realize that they should not provide any
 * non-function API at all.
 */
#if defined LIBA_DLL_IMPORT
#  if defined _WIN32 || defined WIN32 || defined __CYGWIN__
#    define LIBA_SCOPE extern __declspec(dllimport)
#    if defined _MSC_VER
#      define LIBA_SCOPE_VAR LIBA_SCOPE
#    endif
#  endif
#endif
#if !defined LIBA_SCOPE
#  define LIBA_SCOPE extern
#endif
#if !defined LIBA_SCOPE_VAR
#  define LIBA_SCOPE_VAR extern
#endif
#ifdef __cplusplus
extern "C" {
#endif
LIBA_SCOPE_VAR int v1;
LIBA_SCOPE_VAR int v3, v4;
LIBA_SCOPE const int v5, v6;
LIBA_SCOPE_VAR const char* v7;
LIBA_SCOPE_VAR const char v8[];
extern int v9(void);
LIBA_SCOPE_VAR int (*v10) (void);
LIBA_SCOPE_VAR int (*v11) (void);
LIBA_SCOPE int (*const v12) (void);
#ifdef __cplusplus
}
#endif

typedef struct { int arr[1000]; } large;
LIBA_SCOPE_VAR large v13, v14, v15;

int main (void)
{
  char s = v7[0] + v8[0];
  return s + v1 + v3 + v4 + v5 + v6 + v9() + v11() + v12()
	   + v13.arr[0] + v14.arr[0] + v15.arr[0]
           - 8;
}
]])

AT_DATA([broken.c],
[[
/* these symbols should not be exported */
#ifdef __cplusplus
extern "C" {
#endif
extern int w1 (void);
#ifdef __cplusplus
}
#endif
int main (void)
{
  return w1 ();
}
]])

AT_CHECK([$LIBTOOL --mode=compile $CC $CPPFLAGS $CFLAGS -c a.c],[0],[ignore],[ignore])
AT_CHECK([$CC $CPPFLAGS -DLIBA_DLL_IMPORT $CFLAGS -c main.c],[0],[ignore],[ignore])
AT_CHECK([$CC $CPPFLAGS $CFLAGS -c broken.c],[0],[ignore],[ignore])

for exportsyms in '' '-export-symbols-regex "v.*"' '-export-symbols asyms'
do
  # case 1: shared library built from object.
  LT_AT_CHECK([eval '$LIBTOOL --mode=link $CC $CFLAGS $LDFLAGS -o liba.la a.lo \
	       -rpath $libdir' $exportsyms], [], [ignore], [ignore])
  AT_CHECK([$LIBTOOL --mode=link $CC $CFLAGS $LDFLAGS -o main$EXEEXT main.$OBJEXT liba.la],
	   [], [ignore], [ignore])
  LT_AT_EXEC_CHECK([./main])
  if test -n "$exportsyms" && $can_hide; then
    AT_CHECK([if $LIBTOOL --mode=link $CC $CFLAGS $LDFLAGS -o broken$EXEEXT broken.$OBJEXT liba.la
	      then (exit 1); else :; fi], [], [ignore], [ignore])
  fi

  # case 2: shared library built from convenience archive.
  AT_CHECK([$LIBTOOL --mode=link $CC $CFLAGS $LDFLAGS -o libconv.la a.lo],
	   [], [ignore], [ignore])
  LT_AT_CHECK([eval '$LIBTOOL --mode=link $CC $CFLAGS $LDFLAGS -o liba.la libconv.la \
	       -rpath $libdir' $exportsyms], [], [ignore], [ignore])
  AT_CHECK([$LIBTOOL --mode=link $CC $CFLAGS $LDFLAGS -o main$EXEEXT main.$OBJEXT liba.la],
	   [], [ignore], [ignore])
  LT_AT_EXEC_CHECK([./main])
  if test -n "$exportsyms" && $can_hide; then
    AT_CHECK([if $LIBTOOL --mode=link $CC $CFLAGS $LDFLAGS -o broken$EXEEXT broken.$OBJEXT liba.la
	      then (exit 1); else :; fi], [], [ignore], [ignore])
  fi
done

AT_CHECK([$can_hide || (exit 77)])

AT_CLEANUP