From d29ea119d0de0c1466a65a1ca44ab4fabb9e7dc7 Mon Sep 17 00:00:00 2001
From: Assar Westerlund <assar@sics.se>
Date: Sat, 8 Jan 2000 09:42:33 +0000
Subject: [PATCH] new file: replacement for ac_c_bigendian

git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@7764 ec53bebd-3082-4978-b11e-865c3cabbd6b
---
 cf/krb-bigendian.m4 | 50 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 50 insertions(+)
 create mode 100644 cf/krb-bigendian.m4

diff --git a/cf/krb-bigendian.m4 b/cf/krb-bigendian.m4
new file mode 100644
index 000000000..ef5efba0e
--- /dev/null
+++ b/cf/krb-bigendian.m4
@@ -0,0 +1,50 @@
+dnl
+dnl $Id$
+dnl
+
+dnl check if this computer is little or big-endian
+dnl if we can figure it out at compile-time then don't define the cpp symbol
+dnl otherwise test for it and define it.  also allow options for overriding
+dnl it when cross-compiling
+
+AC_DEFUN(KRB_C_BIGENDIAN, [
+AC_CACHE_CHECK(whether byte order is known at compile time,
+krb_cv_c_bigendian_compile,
+[AC_TRY_COMPILE([
+#include <sys/types.h>
+#include <sys/param.h>],[
+#if !BYTE_ORDER || !BIG_ENDIAN || !LITTLE_ENDIAN
+ bogus endian macros
+#endif], krb_cv_c_bigendian_compile=yes, krb_cv_c_bigendian_compile=no)
+if test "$krb_cv_cv_bigendian_compile" = no; then
+  AC_CACHE_CHECK(whether byte ordering is bigendian, krb_cv_c_bigendian,[
+  krb_cv_c_bigendian=unknown
+  AC_TRY_COMPILE([
+#include <sys/types.h>
+#include <siys/param.h>],[
+#if BYTE_ORDER != BIG_ENDIAN
+  not big endian
+#endif], krb_cv_c_bigendian=yes, krb_cv_c_bigendian=no)
+  if test "$krb_cv_c_bigendian" = "unknown"; then
+    AC_TRY_RUN([main () {
+      /* Are we little or big endian?  From Harbison&Steele.  */
+      union
+      {
+	long l;
+	char c[sizeof (long)];
+      } u;
+      u.l = 1;
+      exit (u.c[sizeof (long) - 1] == 1);
+    }], krb_cv_c_bigendian=no, krb_cv_c_bigendian=yes,
+    AC_ARG_ENABLE(bigendian,[
+  --enable-bigendian	the target is big endian], krb_cv_c_bigendian=yes)
+    AC_ARG_ENABLE(littleendian,[
+  --enable-littleendian	the target is little endian], krb_cv_c_bigendian=no))
+  fi
+  ])
+  if test "$krb_cv_bigendian" = "yes"; then
+    AC_DEFINE(WORDS_BIGENDIAN, 1, [define if target is big endian])dnl
+  fi
+fi
+])
+])