# Source: Internal
# Info: Written internally so this component can be built on Solaris.
# Status: This patch is offered at https://bugs.launchpad.net/ubuntu/+source/sbsigntool/+bug/1588548

--- ORIGINAL/configure.ac	2016-06-13 16:45:35.871026417 -0700
+++ sbsigntool-0.6/configure.ac	2016-06-14 15:53:07.450239957 -0700
@@ -27,25 +27,46 @@
   HELP2MAN=:
 fi
 
+OS=$(uname -s)
+AM_CONDITIONAL([SUN_OS], [test "$OS" = "SunOS"])
 AC_MSG_CHECKING([build system endianness])
-AC_PREPROC_IFELSE(
-  [AC_LANG_PROGRAM([[#include <endian.h>]],
-		   [[#if __BYTE_ORDER != __LITTLE_ENDIAN]]
-		   [[#error]]
-		   [[#endif]])],
-  endian=little
-  little_endian=1
-  big_endian=0)
+if test "$OS" = "SunOS"; then
+  AC_PREPROC_IFELSE(
+    [AC_LANG_PROGRAM([[#include <sys/isa_defs.h>]],
+		     [[#if __BYTE_ORDER != __LITTLE_ENDIAN]]
+		     [[#error]]
+		     [[#endif]])],
+    endian=little
+    little_endian=1
+    big_endian=0)
 
-AC_PREPROC_IFELSE(
-  [AC_LANG_PROGRAM([[#include <endian.h>]],
-		   [[#if __BYTE_ORDER != __BIG_ENDIAN]]
-		   [[#error]]
-		   [[#endif]])],
-  endian=big
-  little_endian=0
-  big_endian=1)
+  AC_PREPROC_IFELSE(
+    [AC_LANG_PROGRAM([[#include <sys/isa_defs.h>]],
+		     [[#if __BYTE_ORDER != __BIG_ENDIAN]]
+		     [[#error]]
+		     [[#endif]])],
+    endian=big
+    little_endian=0
+    big_endian=1)
+else
+  AC_PREPROC_IFELSE(
+    [AC_LANG_PROGRAM([[#include <endian.h>]],
+		     [[#if __BYTE_ORDER != __LITTLE_ENDIAN]]
+		     [[#error]]
+		     [[#endif]])],
+    endian=little
+    little_endian=1
+    big_endian=0)
 
+  AC_PREPROC_IFELSE(
+    [AC_LANG_PROGRAM([[#include <endian.h>]],
+		     [[#if __BYTE_ORDER != __BIG_ENDIAN]]
+		     [[#error]]
+		     [[#endif]])],
+    endian=big
+    little_endian=0
+    big_endian=1)
+fi
 
 if test x"$endian" != "xbig" -a x"$endian" != "xlittle"; then
   AC_MSG_ERROR([Can't determine endianness; is endian.h present?])