Darwin flags.

configure.ac

@@ -455,10 +455,15 @@ if test x$use_hardening != xno; then
     HARDENED_CPPFLAGS="$HARDENED_CPPFLAGS -D_FORTIFY_SOURCE=2"
   ],[AC_MSG_ERROR(Cannot enable -D_FORTIFY_SOURCE=2)])
 
-  if test x$TARGET_OS != xwindows; then
+  if test x$BUILD_OS != xdarwin; then
     AX_CHECK_LINK_FLAG([[-Wl,-z,relro]], [HARDENED_LDFLAGS="$HARDENED_LDFLAGS -Wl,-z,relro"],[AC_MSG_ERROR(Cannot enable RELRO)])
     AX_CHECK_LINK_FLAG([[-Wl,-z,now]], [HARDENED_LDFLAGS="$HARDENED_LDFLAGS -Wl,-z,now"],[AC_MSG_ERROR(Cannot enable BIND_NOW)])
+  else
+    AX_CHECK_LINK_FLAG([[-Wl,-z,relro]], [HARDENED_LDFLAGS="$HARDENED_LDFLAGS -Wl,-z,relro"],[AC_MSG_WARN(Cannot enable RELRO)])
+    AX_CHECK_LINK_FLAG([[-Wl,-z,now]], [HARDENED_LDFLAGS="$HARDENED_LDFLAGS -Wl,-z,now"],[AC_MSG_WARN(Cannot enable BIND_NOW)])
+  fi
 
+  if test x$TARGET_OS != xwindows; then
     # All windows code is PIC, forcing it on just adds useless compile warnings
     AX_CHECK_COMPILE_FLAG([-fPIE],[PIE_FLAGS="-fPIE"],[AC_MSG_ERROR(Cannot enable -fPIE)])
     if test x$BUILD_OS = xdarwin; then