sunos.diff

$ git diff -U15
diff --git a/git-compat-util.h b/git-compat-util.h
index bd04564a69..38c806acff 100644
--- a/git-compat-util.h
+++ b/git-compat-util.h
@@ -119,30 +119,37 @@
 #define decimal_length(x)      ((int)(sizeof(x) * 2.56 + 0.5) + 1)
 
 #if defined(__sun__)
  /*
   * On Solaris, when _XOPEN_EXTENDED is set, its header file
   * forces the programs to be XPG4v2, defeating any _XOPEN_SOURCE
   * setting to say we are XPG5 or XPG6.  Also on Solaris,
   * XPG6 programs must be compiled with a c99 compiler, while
   * non XPG6 programs must be compiled with a pre-c99 compiler.
   */
 # if __STDC_VERSION__ - 0 >= 199901L
 # define _XOPEN_SOURCE 600
 # else
 # define _XOPEN_SOURCE 500
 # endif
+
+/*
+ * On Solaris (and Illumos and friends) the isa_defs.h header defines
+ * _BIG_ENDIAN which is needed by e.g. sha1dc.
+ */
+#include <sys/isa_defs.h>
+
 #elif !defined(__APPLE__) && !defined(__FreeBSD__) && !defined(__USLC__) && \
       !defined(_M_UNIX) && !defined(__sgi) && !defined(__DragonFly__) && \
       !defined(__TANDEM) && !defined(__QNX__) && !defined(__MirBSD__) && \
       !defined(__CYGWIN__)
 #define _XOPEN_SOURCE 600 /* glibc2 and AIX 5.3L need 500, OpenBSD needs 600 for S_ISLNK() */
 #define _XOPEN_SOURCE_EXTENDED 1 /* AIX 5.3L needs this */
 #endif
 #define _ALL_SOURCE 1
 #define _GNU_SOURCE 1
 #define _BSD_SOURCE 1
 #define _DEFAULT_SOURCE 1
 #define _NETBSD_SOURCE 1
 #define _SGI_SOURCE 1
 
 #if defined(WIN32) && !defined(__CYGWIN__) /* Both MinGW and MSVC */