doc: Remove references to POSIX 202x.
[gnulib.git] / m4 / ld-output-def.m4
blob88bc2c633ee066cd25d653858445e8a1f84fdea8
1 # ld-output-def.m4
2 # serial 3
3 dnl Copyright (C) 2008-2024 Free Software Foundation, Inc.
4 dnl This file is free software; the Free Software Foundation
5 dnl gives unlimited permission to copy and/or distribute it,
6 dnl with or without modifications, as long as this notice is preserved.
8 dnl From Simon Josefsson
10 # gl_LD_OUTPUT_DEF()
11 # -------------
12 # Check if linker supports -Wl,--output-def and define automake
13 # conditional HAVE_LD_OUTPUT_DEF if it is.
14 AC_DEFUN([gl_LD_OUTPUT_DEF],
16   AC_CACHE_CHECK([if gcc/ld supports -Wl,--output-def],
17     [gl_cv_ld_output_def],
18     [if test "$enable_shared" = no; then
19        gl_cv_ld_output_def="not needed, shared libraries are disabled"
20      else
21        gl_ldflags_save=$LDFLAGS
22        LDFLAGS="-Wl,--output-def,conftest.def"
23        AC_LINK_IFELSE([AC_LANG_PROGRAM([[]])],
24                    [gl_cv_ld_output_def=yes],
25                    [gl_cv_ld_output_def=no])
26        rm -f conftest.def
27        LDFLAGS="$gl_ldflags_save"
28      fi])
29   AM_CONDITIONAL([HAVE_LD_OUTPUT_DEF], test "x$gl_cv_ld_output_def" = "xyes")