1# ld-output-def.m4 serial 2 2dnl Copyright (C) 2008-2013 Free Software Foundation, Inc. 3dnl This file is free software; the Free Software Foundation 4dnl gives unlimited permission to copy and/or distribute it, 5dnl with or without modifications, as long as this notice is preserved. 6 7dnl From Simon Josefsson 8 9# gl_LD_OUTPUT_DEF() 10# ------------- 11# Check if linker supports -Wl,--output-def and define automake 12# conditional HAVE_LD_OUTPUT_DEF if it is. 13AC_DEFUN([gl_LD_OUTPUT_DEF], 14[ 15 AC_CACHE_CHECK([if gcc/ld supports -Wl,--output-def], 16 [gl_cv_ld_output_def], 17 [if test "$enable_shared" = no; then 18 gl_cv_ld_output_def="not needed, shared libraries are disabled" 19 else 20 gl_ldflags_save=$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]) 25 rm -f conftest.def 26 LDFLAGS="$gl_ldflags_save" 27 fi]) 28 AM_CONDITIONAL([HAVE_LD_OUTPUT_DEF], test "x$gl_cv_ld_output_def" = "xyes") 29]) 30