# ld-output-def.m4 serial 2

dnl Copyright (C) 2008-2020 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")

])