diff options
Diffstat (limited to 'acinclude.m4')
| -rw-r--r-- | acinclude.m4 | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/acinclude.m4 b/acinclude.m4 index 9656eac3..566953df 100644 --- a/acinclude.m4 +++ b/acinclude.m4 @@ -6583,3 +6583,43 @@ SED=$lt_cv_path_SED AC_SUBST([SED]) AC_MSG_RESULT([$SED]) ]) + + +dnl Add some custom macros for pacman and libalpm + +dnl GCC_STACK_PROTECT_LIB +dnl adds -lssp to LIBS if it is available +dnl ssp is usually provided as part of libc, but was previously a separate lib +dnl It does not hurt to add -lssp even if libc provides SSP - in that case +dnl libssp will simply be ignored. +AC_DEFUN([GCC_STACK_PROTECT_LIB],[ + AC_CACHE_CHECK([whether libssp exists], ssp_cv_lib, + [ssp_old_libs="$LIBS" + LIBS="$LIBS -lssp" + AC_TRY_LINK(,, ssp_cv_lib=yes, ssp_cv_lib=no) + LIBS="$ssp_old_libs" + ]) + if test $ssp_cv_lib = yes; then + LIBS="$LIBS -lssp" + fi +]) + +dnl GCC_STACK_PROTECT_CC +dnl checks -fstack-protector with the C compiler, if it exists then updates +dnl CFLAGS and defines ENABLE_SSP_CC +AC_DEFUN([GCC_STACK_PROTECT_CC],[ + AC_LANG_ASSERT(C) + if test "X$CC" != "X"; then + AC_CACHE_CHECK([whether ${CC} accepts -fstack-protector], + ssp_cv_cc, + [ssp_old_cflags="$CFLAGS" + CFLAGS="$CFLAGS -fstack-protector" + AC_TRY_COMPILE(,, ssp_cv_cc=yes, ssp_cv_cc=no) + CFLAGS="$ssp_old_cflags" + ]) + if test $ssp_cv_cc = yes; then + CFLAGS="$CFLAGS -fstack-protector" + AC_DEFINE([ENABLE_SSP_CC], 1, [Define if SSP C support is enabled.]) + fi + fi +]) |