buildroot

From e0803c0bdbb1abf06b6b5bb1b52fdb733505b8f7 Mon Sep 17 00:00:00 2001

From: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

Date: Wed, 25 Jan 2017 22:41:02 +1300

Subject: [PATCH] src/regex.c: support old compilers for the endian

 check

​

libselinux 2.6 has added some code in regex.c that uses __BYTE_ORDER__

to determine the system endianness. Unfortunately, this definition

provided directly by the compiler doesn't exist in older gcc versions

such as gcc 4.4.

​

In order to address this, this commit extends the logic to use

<endian.h> definitions if __BYTE_ORDER__ is not provided by the

compiler. This allows libselinux to build properly with gcc 4.4.

​

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

---

 src/regex.c | 13 ++++++++++++-

 1 file changed, 12 insertions(+), 1 deletion(-)

​

diff --git a/src/regex.c b/src/regex.c

index a3b427b..0c5ad27 100644

--- a/src/regex.c

+++ b/src/regex.c

@@ -13,7 +13,18 @@

 #endif

 #ifndef __BYTE_ORDER__

-#error __BYTE_ORDER__ not defined. Unable to determine endianness.

+

+/* If the compiler doesn't define __BYTE_ORDER__, try to use the C

+ * library <endian.h> header definitions. */

+#include <endian.h>

+#ifndef __BYTE_ORDER

+#error Neither __BYTE_ORDER__ nor __BYTE_ORDER defined. Unable to determine endianness.

+#endif

+

+#define __ORDER_LITTLE_ENDIAN __LITTLE_ENDIAN

+#define __ORDER_BIG_ENDIAN __BIG_ENDIAN

+#define __BYTE_ORDER__ __BYTE_ORDER

+

 #endif

 #ifdef USE_PCRE2

-- 

2.7.4

​