Add -DMULTIARCH (see change #3006).

[p5sagit/p5-mst-13.2.git] / config_h.SH

diff --git a/config_h.SH b/config_h.SH
index 842b2c6..27f547f 100644 (file)
--- a/config_h.SH
+++ b/config_h.SH
@@ -1072,19 +1072,22 @@ sed <<!GROK!THIS! >config.h -e 's!^#undef\(.*/\)\*!/\*#define\1 \*!' -e 's!^#un-
 #$i_syssecrt   I_SYS_SECURITY  /**/
 
 /* MEM_ALIGNBYTES:
- *      This symbol contains the number of bytes required to align a
- *      double. Usual values are 2, 4 and 8.
- *      On NeXT starting with 3.2, you can build "Fat" Multiple Architecture
- *      Binaries (MAB) for targets with varying alignment.  This only matters
- *      for perl, where the config.h can be generated and installed on one
- *      system, and used by a different architecture to build an extension.
- *      The default is eight, for safety.
+ *     This symbol contains the number of bytes required to align a
+ *     double. Usual values are 2, 4 and 8. The default is eight,
+ *     for safety.
  */
-#define MEM_ALIGNBYTES $alignbytes     /**/
+#if defined(CROSSCOMPILE) || defined(MULTIARCH)
+#  define MEM_ALIGNBYTES 8
+#else
+#define MEM_ALIGNBYTES $alignbytes
+#endif
 
 /* BYTEORDER:
  *     This symbol holds the hexadecimal constant defined in byteorder,
  *     i.e. 0x1234 or 0x4321, etc...
+ *     If the compiler supports cross-compiling or multiple-architecture
+ *     binaries (eg. on NeXT systems), use compiler-defined macros to
+ *     determine the byte order.
  *     On NeXT 3.2 (and greater), you can build "Fat" Multiple Architecture
  *     Binaries (MAB) on either big endian or little endian machines.
  *     The endian-ness is available at compile-time.  This only matters
@@ -1095,14 +1098,31 @@ sed <<!GROK!THIS! >config.h -e 's!^#undef\(.*/\)\*!/\*#define\1 \*!' -e 's!^#un-
  *     so the default case (for NeXT) is big endian to catch them. 
  *     This might matter for NeXT 3.0.
  */
-#ifndef NeXT
+#if defined(CROSSCOMPILE) || defined(MULTIARCH)
+#  ifdef __LITTLE_ENDIAN__
+#    if LONGSIZE == 4
+#      define BYTEORDER 0x1234
+#    else
+#      if LONGSIZE == 8
+#        define BYTEORDER 0x12345678
+#      endif
+#    endif
+#  else
+#    ifdef __BIG_ENDIAN__
+#      if LONGSIZE == 4
+#        define BYTEORDER 0x4321
+#      else
+#        if LONGSIZE == 8
+#          define BYTEORDER 0x87654321
+#        endif
+#      endif
+#    endif
+#  endif
+#  if !defined(BYTEORDER) && (defined(NeXT) || defined(__NeXT__))
+#    define BYTEORDER 0x4321
+#  endif
+#else
 #define BYTEORDER 0x$byteorder /* large digits for MSB */
-#else  /* NeXT */
-#ifdef __LITTLE_ENDIAN__
-#define BYTEORDER 0x1234
-#else /* __BIG_ENDIAN__ */
-#define BYTEORDER 0x4321
-#endif /* ENDIAN CHECK */
 #endif /* NeXT */
 
 /* CASTI32: