Applied upstream gnulib patch to avoid -Wformat-security warning (bug #1037038).

Resolves: rhbz#1037038

diffutils-format-security.patch

@@ -0,0 +1,17 @@
+diff -up diffutils-3.3/gnulib-tests/test-xvasprintf.c.format-security diffutils-3.3/gnulib-tests/test-xvasprintf.c
+--- diffutils-3.3/gnulib-tests/test-xvasprintf.c.format-security	2013-03-22 04:20:50.000000000 +0000
++++ diffutils-3.3/gnulib-tests/test-xvasprintf.c	2013-12-04 13:43:09.927443499 +0000
+@@ -16,6 +16,13 @@
+ 
+ /* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+ 
++/* Tell GCC not to warn about the specific edge cases tested here.  */
++#if (__GNUC__ == 4 && 3 <= __GNUC_MINOR__) || 4 < __GNUC__
++# pragma GCC diagnostic ignored "-Wformat-zero-length"
++# pragma GCC diagnostic ignored "-Wformat-nonliteral"
++# pragma GCC diagnostic ignored "-Wformat-security"
++#endif
++
+ #include <config.h>
+ 
+ #include "xvasprintf.h"

diffutils.spec

@@ -1,13 +1,14 @@
 Summary: A GNU collection of diff utilities
 Name: diffutils
 Version: 3.3
-Release: 4%{?dist}
+Release: 5%{?dist}
 Group: Applications/Text
 URL: http://www.gnu.org/software/diffutils/diffutils.html
 Source: ftp://ftp.gnu.org/gnu/diffutils/diffutils-%{version}.tar.xz
 Patch1: diffutils-cmp-s-empty.patch
 Patch2: diffutils-mkdir_p.patch
 Patch4: diffutils-i18n.patch
+Patch5: diffutils-format-security.patch
 License: GPLv3+
 Requires(post): info
 Requires(preun): info
@@ -39,6 +40,10 @@ Install diffutils if you need to compare text files.
 
 %patch4 -p1 -b .i18n
 
+# Applied upstream gnulib patch to avoid -Wformat-security warning
+# (bug #1037038).
+%patch5 -p1 -b .format-security
+
 # Run autoreconf for aarch64 support (bug #925256).
 autoreconf
 
@@ -75,6 +80,10 @@ rm -rf $RPM_BUILD_ROOT
 %{_infodir}/diffutils.info*gz
 
 %changelog
+* Wed Dec  4 2013 Tim Waugh <twaugh@redhat.com> 3.3-5
+- Applied upstream gnulib patch to avoid -Wformat-security warning
+  (bug #1037038).
+
 * Wed Oct 23 2013 Tim Waugh <twaugh@redhat.com> 3.3-4
 - Fixed multibyte handling logic for diff -Z (bug #1012075).