summaryrefslogtreecommitdiff
path: root/m4/ld-output-def.m4
blob: 35116843b0a433120b7be6de92bdc155e9fd7473 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
# ld-output-def.m4 serial 2
dnl Copyright (C) 2008-2012 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.

dnl From Simon Josefsson

# gl_LD_OUTPUT_DEF()
# -------------
# Check if linker supports -Wl,--output-def and define automake
# conditional HAVE_LD_OUTPUT_DEF if it is.
AC_DEFUN([gl_LD_OUTPUT_DEF],
[
  AC_CACHE_CHECK([if gcc/ld supports -Wl,--output-def],
    [gl_cv_ld_output_def],
    [if test "$enable_shared" = no; then
       gl_cv_ld_output_def="not needed, shared libraries are disabled"
     else
       gl_ldflags_save=$LDFLAGS
       LDFLAGS="-Wl,--output-def,conftest.def"
       AC_LINK_IFELSE([AC_LANG_PROGRAM([])],
                   [gl_cv_ld_output_def=yes],
                   [gl_cv_ld_output_def=no])
       rm -f conftest.def
       LDFLAGS="$gl_ldflags_save"
     fi])
  AM_CONDITIONAL([HAVE_LD_OUTPUT_DEF], test "x$gl_cv_ld_output_def" = "xyes")
])