Try to get the endianess optimization working, by including an assortment

of possibly relevant headers and only go with the fast path if we have
credible information that this is a big-endian platform.



git-svn-id: http://www.varnish-cache.org/svn/trunk/varnish-cache@3439 d4fa192b-c00b-0410-8231-f00ffab90ce4

configure.ac

@@ -70,11 +70,13 @@ AC_SUBST(LIBM)
 AC_HEADER_STDC
 AC_HEADER_SYS_WAIT
 AC_HEADER_TIME
+AC_CHECK_HEADERS([sys/endian.h])
 AC_CHECK_HEADERS([sys/filio.h])
 AC_CHECK_HEADERS([sys/mount.h])
 AC_CHECK_HEADERS([sys/socket.h])
 AC_CHECK_HEADERS([sys/statvfs.h])
 AC_CHECK_HEADERS([sys/vfs.h])
+AC_CHECK_HEADERS([endian.h])
 AC_CHECK_HEADERS([netinet/in.h])
 AC_CHECK_HEADERS([pthread_np.h])
 AC_CHECK_HEADERS([stddef.h])

lib/libvarnish/vsha256.c

@@ -26,10 +26,22 @@
  * From: $FreeBSD: head/lib/libmd/sha256c.c 154479 2006-01-17 15:35:57Z phk $
  */
 
-#include <stdint.h>
+#include "config.h"
 
+#include <stdint.h>
 #include <string.h>
 
+#ifdef HAVE_ENDIAN_H
+#include <endian.h>
+#define BYTE_ORDER	__BYTE_ORDER
+#define BIG_ENDIAN	__BIG_ENDIAN
+#endif
+#ifdef HAVE_SYS_ENDIAN_H
+#include <sys/endian.h>
+#define BYTE_ORDER	_BYTE_ORDER
+#define BIG_ENDIAN	_BIG_ENDIAN
+#endif
+
 #include "vsha256.h"
 
 #if defined(BYTE_ORDER) && BYTE_ORDER == BIG_ENDIAN