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Diffstat (limited to 'm4/ld-output-def.m4')
| -rw-r--r-- | m4/ld-output-def.m4 | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/m4/ld-output-def.m4 b/m4/ld-output-def.m4 new file mode 100644 index 0000000..59895bc --- /dev/null +++ b/m4/ld-output-def.m4 @@ -0,0 +1,29 @@ +# ld-output-def.m4 serial 2 +dnl Copyright (C) 2008-2013 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") +]) |