fix libtool 2.4.2 stack-protector flag handling

Teach libtool 2.4.2 how to pass -fstack-protector* to the linker so
libssp is properly linked in on some toolchains. See upstream patch:
https://github.com/instantinfrastructure/poky-daisy/blob/master/meta/recipes-devtools/libtool/libtool/respect-fstack-protector.patch

Thanks to kinichiro inoguchi

2 files changed, 8 insertions, 1 deletions

diff --git a/autogen.sh b/autogen.sh
index 0b0fc04..72174ea 100755
--- a/autogen.sh
+++ b/autogen.sh
@@ -4,3 +4,8 @@ set -e
 ./update.sh
 mkdir -p m4
 autoreconf -i -f
+
+# Patch libtool 2.4.2 to pass -fstack-protector as a linker argument
+sed 's/-fuse-linker-plugin)/-fuse-linker-plugin|-fstack-protector*)/' \
+  ltmain.sh > ltmain.sh.fixed
+mv -f ltmain.sh.fixed ltmain.sh
diff --git a/m4/check-hardening-options.m4 b/m4/check-hardening-options.m4
index 544d283..3ffdb1a 100644
--- a/m4/check-hardening-options.m4
+++ b/m4/check-hardening-options.m4
@@ -94,7 +94,9 @@ AC_DEFUN([CHECK_C_HARDENING_OPTIONS], [
                                         AC_MSG_WARN([compiler does not appear to support stack protection])
                                 )
                         )
-                        AC_SEARCH_LIBS([__stack_chk_guard],[ssp])
+                        AS_IF([test "x$HOST_OS" = "xwin"], [
+                                AC_SEARCH_LIBS([__stack_chk_guard],[ssp])
+                        ])
                 ])
         ])