On Jan 27, 2006, at 12:19 AM, Ronald Oussoren wrote: > > On 27-jan-2006, at 8:46, Kevin Ollivier wrote: > >> On Jan 26, 2006, at 10:55 PM, Bob Ippolito wrote: >> >>> Some extensions aren't going to build cleanly universal, and most >>> users probably aren't going to have all the SDKs installed so if >>> it shipped with universal flags then it wouldn't be able to build >>> extensions. >> >> Unless we had distutils check for the existence of the Universal >> SDK before setting the flags, or probably more accurately, remove >> them if the SDK isn't available. Then perhaps add a distutils >> 'flag' to manually turn off Universal building for extensions that >> can't be fixed. This might be a bit of a hack, but I don't imagine >> it would be too painful. The question is how many extensions would >> have troubles... But I guess the only way we'll know is to test >> the waters. In any case, even if it wouldn't be reasonable to make >> a Universal build the "official" build, it would be very useful to >> people packaging apps, even if it were Tiger+ only. > > I know of one popular extension (cElementTree) that won't build > with '-arch i386 -arch ppc' because it calcutes a #define based on > the current byte-order. There might be others, I haven't done a > thorough search yet.
In my python24-fat branch, I made the following change to pyconfig.h.in which I believe will resolve that issue in any extension that doesn't do something dumb like trying to grep the endianness out of pyconfig.h: http://svn.red-bean.com/bob/python24-fat/pyconfig.h.in /* Define to 1 if your processor stores words with the most significant byte first (like Motorola and SPARC, unlike Intel and VAX). */ #ifdef __BIG_ENDIAN__ #define WORDS_BIGENDIAN 1 #else #ifndef __LITTLE_ENDIAN__ #undef WORDS_BIGENDIAN #endif #endif GCC defines __BIG_ENDIAN__ to 1 when it's compiling a big endian arch... and __LITTLE_ENDIAN__ to 1 when it's compiling on a little endian arch. Configured on i386, this turns into: #ifdef __BIG_ENDIAN__ #define WORD_BIGENDIAN 1 #else #ifndef __LITTLE_ENDIAN__ /* #undef WORDS_BIGENDIAN */ #endif #endif When configured on PPC, it turns into: #ifdef __BIG_ENDIAN__ #define WORD_BIGENDIAN 1 #else #ifndef __LITTLE_ENDIAN__ #define WORDS_BIGENDIAN 1 #endif #endif Since this is GCC, the #ifndef __LITTLE_ENDIAN__ branch is always false... so I'm making this a compile-time not configure-time value, but I left in the configure-time stuff for other platforms. -bob _______________________________________________ Pythonmac-SIG maillist - Pythonmac-SIG@python.org http://mail.python.org/mailman/listinfo/pythonmac-sig
