commit 290840c841646c24d43527b1af284d76efc046c9
author Peter Huewe <peterhuewe@gmx.de> Mon May 22 21:51:10 2017 +0200
committer Philip Tricca <philip.b.tricca@intel.com> Tue May 23 09:25:40 2017 -0700
tree 12471c04252556195790735307eef6534daef804
parent 1d36af6ed2fb38246500ec5ba86889f3bfbe07a4

configure: Undefine FORTIFY_SOURCE first, then define it

On my hardened gentoo system _FORTIFY_SOURCE is already defined,
thus it makes sense to undefine it first then define it, not vice
versa.

Signed-off-by: Peter Huewe <peterhuewe@gmx.de>

configure.ac

diff --git a/configure.ac b/configure.ac
index 5b97a51..1135060 100644
--- a/configure.ac
+++ b/configure.ac
@@ -31,8 +31,8 @@
 AX_ADD_COMPILER_FLAG([-fstack-protector-all])
 AX_ADD_COMPILER_FLAG([-fpic])
 AX_ADD_COMPILER_FLAG([-fPIC])
-AX_ADD_PREPROC_FLAG([-D_FORTIFY_SOURCE=2])
 AX_ADD_PREPROC_FLAG([-U_FORTIFY_SOURCE])
+AX_ADD_PREPROC_FLAG([-D_FORTIFY_SOURCE=2])
 AX_ADD_LINK_FLAG([-Wl,--no-undefined])
 AX_ADD_LINK_FLAG([-Wl,-z,noexecstack])
 AX_ADD_LINK_FLAG([-Wl,-z,now])