m4: Use -U and -D in cc_fortify

Not just -D. This is to test the same thing that gets used.
dovecot · Mar 6, 2018 · 7c4fa81 · 7c4fa81
1 parent 37b3c51
commit 7c4fa81
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/m4/cc_fortify.m4 b/m4/cc_fortify.m4
@@ -7,7 +7,7 @@ AC_DEFUN([AC_CC_D_FORTIFY_SOURCE],[
     if test $enable_hardening = yes; then
       case "$host" in
         *)
-          gl_COMPILER_OPTION_IF([-O2 -D_FORTIFY_SOURCE=2], [
+          gl_COMPILER_OPTION_IF([-O2 -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2], [
             CFLAGS="$CFLAGS -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2"
             ],
             [],