1 files changed, 62 insertions, 0 deletions
diff --git a/third_party/heimdal/cf/krb-bigendian.m4 b/third_party/heimdal/cf/krb-bigendian.m4
new file mode 100644
index 00000000000..e8037503f87
--- /dev/null
+++ b/third_party/heimdal/cf/krb-bigendian.m4
@@ -0,0 +1,62 @@
+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_ARG_ENABLE(bigendian,
+	AS_HELP_STRING([--enable-bigendian],[the target is big endian]),
+krb_cv_c_bigendian=yes)
+AC_ARG_ENABLE(littleendian,
+	AS_HELP_STRING([--enable-littleendian],[the target is little endian]),
+krb_cv_c_bigendian=no)
+AC_CACHE_CHECK([whether byte order is known at compile time],
+krb_cv_c_bigendian_compile,
+[AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
+#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])])
+AC_CACHE_CHECK(whether byte ordering is bigendian, krb_cv_c_bigendian,[
+  if test "$krb_cv_c_bigendian_compile" = "yes"; then
+    AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
+#include <sys/types.h>
+#include <sys/param.h>
+#if BYTE_ORDER != BIG_ENDIAN
+  not big endian
+#endif]])],[krb_cv_c_bigendian=yes],[krb_cv_c_bigendian=no])
+  else
+    AC_RUN_IFELSE([AC_LANG_SOURCE([[main (int argc, char **argv) {
+      /* Are we little or big endian?  From Harbison&Steele.  */
+      union
+      {
+	long l;
+	char c[sizeof (long)];
+    } u;
+    u.l = 1;
+    exit (u.c[sizeof (long) - 1] == 1);
+  }]])],[krb_cv_c_bigendian=no],[krb_cv_c_bigendian=yes],
+  [AC_MSG_ERROR([specify either --enable-bigendian or --enable-littleendian])])
+  fi
+])
+if test "$krb_cv_c_bigendian" = "yes"; then
+  AC_DEFINE(WORDS_BIGENDIAN, 1, [define if target is big endian])dnl
+fi
+if test "$krb_cv_c_bigendian_compile" = "yes"; then
+  AC_DEFINE(ENDIANESS_IN_SYS_PARAM_H, 1, [define if sys/param.h defines the endiness])dnl
+fi
+AH_BOTTOM([
+#ifdef ENDIANESS_IN_SYS_PARAM_H
+#  include <sys/types.h>
+#  include <sys/param.h>
+#  if BYTE_ORDER == BIG_ENDIAN
+#  define WORDS_BIGENDIAN 1
+#  endif
+#endif
+])
+])