* sim/ucsim/configure.in, sim/ucsim/configure, sim/ucsim/ddconfig_in.h:

[fw/sdcc] / sim / ucsim / ddconfig_in.h

diff --git a/sim/ucsim/ddconfig_in.h b/sim/ucsim/ddconfig_in.h
index 71f023ecc52229f16f888988ce2f008e3b008424..054a0c85dd0dbc7f467e43cf979298f9343f3fcb 100644 (file)
--- a/sim/ucsim/ddconfig_in.h
+++ b/sim/ucsim/ddconfig_in.h
@@ -98,10 +98,32 @@ Software Foundation, 59 Temple Place - Suite 330, Boston, MA
 #define TYPE_UBYTE unsigned TYPE_BYTE
 #define TYPE_UWORD unsigned TYPE_WORD
 #define TYPE_UDWORD unsigned TYPE_DWORD
-#undef WORDS_BIGENDIAN
 #undef _M_
 #undef _A_
 
+/*
+ * find out the endianess of host machine
+ * in order to be able to make Mac OS X unified binaries
+ */
+#if __BIG_ENDIAN__ || _BIG_ENDIAN
+/* 1) trust the compiler */
+# define WORDS_BIGENDIAN 1
+#elif __LITTLE_ENDIAN__
+/* do nothing */
+#elif (defined BYTE_ORDER && defined BIG_ENDIAN && defined LITTLE_ENDIAN && BYTE_ORDER && BIG_ENDIAN && LITTLE_ENDIAN)
+/* 2) trust the header files */
+# if BYTE_ORDER == BIG_ENDIAN 
+#   define WORDS_BIGENDIAN 1
+# endif
+#else 
+/* 3) trust the configure; this actually doesn't work for unified Mac OS X binaries :-( */
+# undef BUILD_WORDS_BIGENDIAN
+# if (defined BUILD_WORDS_BIGENDIAN && BUILD_WORDS_BIGENDIAN)
+#   define WORDS_BIGENDIAN  1
+# endif
+/* 4) assume that host is a little endian machine */
+#endif
+
 #undef VERSIONSTR
 #undef VERSIONHI
 #undef VERSIONLO