X-Git-Url: http://git.ozlabs.org/?p=ccan;a=blobdiff_plain;f=ccan%2Fendian%2Fendian.h;h=3753f49003df8d5d31208ab5b154ebe375d7e696;hp=0c99cc802db0e0acac0668d11d305fe89b4b5aed;hb=696c9b68f6334835f13037a83dd5a11c1c8129c7;hpb=9eb1109954a99791ae6a930a4b7120b1c55ee1a7

diff --git a/ccan/endian/endian.h b/ccan/endian/endian.h
index 0c99cc80..3753f490 100644
--- a/ccan/endian/endian.h
+++ b/ccan/endian/endian.h
@@ -103,12 +103,29 @@ 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
+#ifndef __BYTE_ORDER
+#define __BYTE_ORDER	__LITTLE_ENDIAN
+#elif __BYTE_ORDER != __LITTLE_ENDIAN
+#error "__BYTE_ORDER already defined, but not equal to __LITTLE_ENDIAN"
+#endif
+#elif HAVE_BIG_ENDIAN
+#ifndef __BYTE_ORDER
+#define __BYTE_ORDER	__BIG_ENDIAN
+#elif __BYTE_ORDER != __BIG_ENDIAN
+#error "__BYTE_ORDER already defined, but not equal to __BIG_ENDIAN"
 #endif
+#endif
+
 
 #ifdef __CHECKER__
 /* sparse needs forcing to remove bitwise attribute from ccan/short_types */