diff options
Diffstat (limited to 'aclocal.m4')
-rw-r--r-- | aclocal.m4 | 59 |
1 files changed, 59 insertions, 0 deletions
@@ -1246,3 +1246,62 @@ ac_cv_type_int_fast32_t="$ac_cv_type_int_fast32_t" ac_cv_type_intmax_t="$ac_cv_type_intmax_t" ]) ]) + +# ld-version-script.m4 serial 3 +dnl Copyright (C) 2008-2014 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 + +# FIXME: The test below returns a false positive for mingw +# cross-compiles, 'local:' statements does not reduce number of +# exported symbols in a DLL. Use --disable-ld-version-script to work +# around the problem. + +# gl_LD_VERSION_SCRIPT +# -------------------- +# Check if LD supports linker scripts, and define automake conditional +# HAVE_LD_VERSION_SCRIPT if so. +AC_DEFUN([LD_VERSION_SCRIPT], +[ + AC_ARG_ENABLE([ld-version-script], + AS_HELP_STRING([--enable-ld-version-script], + [enable linker version script (default is enabled when possible)]), + [have_ld_version_script=$enableval], []) + if test -z "$have_ld_version_script"; then + AC_MSG_CHECKING([if LD -Wl,--version-script works]) + save_LDFLAGS="$LDFLAGS" + LDFLAGS="$LDFLAGS -Wl,--version-script=conftest.map" + cat > conftest.map <<EOF +foo +EOF + AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])], + [accepts_syntax_errors=yes], [accepts_syntax_errors=no]) + if test "$accepts_syntax_errors" = no; then + cat > conftest.map <<EOF +VERS_1 { + global: sym; +}; + +VERS_2 { + global: sym; +} VERS_1; +EOF + AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])], + [have_ld_version_script=yes], [have_ld_version_script=no]) + else + have_ld_version_script=no + fi + rm -f conftest.map + LDFLAGS="$save_LDFLAGS" + AC_MSG_RESULT($have_ld_version_script) + fi + if test "$have_ld_version_script" = "yes";then + EXTRA_LINKER_FLAGS="-Wl,--version-script=libnettle.map" + AC_SUBST(EXTRA_LINKER_FLAGS) + EXTRA_HOGWEED_LINKER_FLAGS="-Wl,--version-script=libhogweed.map" + AC_SUBST(EXTRA_HOGWEED_LINKER_FLAGS) + fi +]) |