[Skiboot] [PATCH v5 2/8] Add glibc style endianess check in CCAN

[Akshay Adiga]

CCAN adds support for glibc style in the following commit :
https://github.com/rustyrussell/ccan/commit/759ac0f0564104d5028acd47c3e9fdb858c96d1d

Signed-off-by: Akshay Adiga <akshay.adiga at linux.vnet.ibm.com>
Reviewed-by: Vaidyanathan Srinivasan <svaidy at linux.vnet.ibm.com>
---
 ccan/endian/endian.h | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/ccan/endian/endian.h b/ccan/endian/endian.h
index 0c99cc8..6732e8a 100644
--- a/ccan/endian/endian.h
+++ b/ccan/endian/endian.h
@@ -103,13 +103,22 @@ static inline uint64_t bswap_64(uint64_t val)
 }
 #endif
 
+/* Needed for Glibc like endiness check */
+#define	__LITTLE_ENDIAN	1234
+#define	__BIG_ENDIAN	4321
+
 /* Sanity check the defines.  We don't handle weird endianness. */
 #if !HAVE_LITTLE_ENDIAN && !HAVE_BIG_ENDIAN
 #error "Unknown endian"
 #elif HAVE_LITTLE_ENDIAN && HAVE_BIG_ENDIAN
 #error "Can't compile for both big and little endian."
+#elif HAVE_LITTLE_ENDIAN
+#define __BYTE_ORDER	__LITTLE_ENDIAN
+#elif HAVE_BIG_ENDIAN
+#define __BYTE_ORDER	__BIG_ENDIAN
 #endif
 
+
 #ifdef __CHECKER__
 /* sparse needs forcing to remove bitwise attribute from ccan/short_types */
 #define ENDIAN_CAST __attribute__((force))
-- 
2.5.5