1 # ld-output-def.m4 serial 2
2 dnl Copyright (C) 2008-2020 Free Software Foundation, Inc.
3 dnl This file is free software; the Free Software Foundation
4 dnl gives unlimited permission to copy and/or distribute it,
5 dnl with or without modifications, as long as this notice is preserved.
7 dnl From Simon Josefsson
11 # Check if linker supports -Wl,--output-def and define automake
12 # conditional HAVE_LD_OUTPUT_DEF if it is.
13 AC_DEFUN([gl_LD_OUTPUT_DEF],
15 AC_CACHE_CHECK([if gcc/ld supports -Wl,--output-def],
16 [gl_cv_ld_output_def],
17 [if test "$enable_shared" = no; then
18 gl_cv_ld_output_def="not needed, shared libraries are disabled"
20 gl_ldflags_save=$LDFLAGS
21 LDFLAGS="-Wl,--output-def,conftest.def"
22 AC_LINK_IFELSE([AC_LANG_PROGRAM([])],
23 [gl_cv_ld_output_def=yes],
24 [gl_cv_ld_output_def=no])
26 LDFLAGS="$gl_ldflags_save"
28 AM_CONDITIONAL([HAVE_LD_OUTPUT_DEF], test "x$gl_cv_ld_output_def" = "xyes")