1*0ac341f1SConrad Meyer# ld-output-def.m4 serial 2 2*0ac341f1SConrad Meyerdnl Copyright (C) 2008-2013 Free Software Foundation, Inc. 3*0ac341f1SConrad Meyerdnl This file is free software; the Free Software Foundation 4*0ac341f1SConrad Meyerdnl gives unlimited permission to copy and/or distribute it, 5*0ac341f1SConrad Meyerdnl with or without modifications, as long as this notice is preserved. 6*0ac341f1SConrad Meyer 7*0ac341f1SConrad Meyerdnl From Simon Josefsson 8*0ac341f1SConrad Meyer 9*0ac341f1SConrad Meyer# gl_LD_OUTPUT_DEF() 10*0ac341f1SConrad Meyer# ------------- 11*0ac341f1SConrad Meyer# Check if linker supports -Wl,--output-def and define automake 12*0ac341f1SConrad Meyer# conditional HAVE_LD_OUTPUT_DEF if it is. 13*0ac341f1SConrad MeyerAC_DEFUN([gl_LD_OUTPUT_DEF], 14*0ac341f1SConrad Meyer[ 15*0ac341f1SConrad Meyer AC_CACHE_CHECK([if gcc/ld supports -Wl,--output-def], 16*0ac341f1SConrad Meyer [gl_cv_ld_output_def], 17*0ac341f1SConrad Meyer [if test "$enable_shared" = no; then 18*0ac341f1SConrad Meyer gl_cv_ld_output_def="not needed, shared libraries are disabled" 19*0ac341f1SConrad Meyer else 20*0ac341f1SConrad Meyer gl_ldflags_save=$LDFLAGS 21*0ac341f1SConrad Meyer LDFLAGS="-Wl,--output-def,conftest.def" 22*0ac341f1SConrad Meyer AC_LINK_IFELSE([AC_LANG_PROGRAM([])], 23*0ac341f1SConrad Meyer [gl_cv_ld_output_def=yes], 24*0ac341f1SConrad Meyer [gl_cv_ld_output_def=no]) 25*0ac341f1SConrad Meyer rm -f conftest.def 26*0ac341f1SConrad Meyer LDFLAGS="$gl_ldflags_save" 27*0ac341f1SConrad Meyer fi]) 28*0ac341f1SConrad Meyer AM_CONDITIONAL([HAVE_LD_OUTPUT_DEF], test "x$gl_cv_ld_output_def" = "xyes") 29*0ac341f1SConrad Meyer]) 30