Martin v. Löwis wrote: ......... > > In the specific case, just use the WORDS_BIGENDIAN macro defined in > pyconfig.h; it will be defined if the target is bigendian, and > undefined otherwise. In the case of a universal build, it will be > undefined in the x86 compiler invocation, and defined in the ppc > invocation. > > If you are curious as to how it arranges that, read the source. ......
OK I read the source and am slightly puzzled by the code in pyconfig.h.in which reads #ifdef __BIG_ENDIAN__ #define WORDS_BIGENDIAN 1 #else #ifndef __LITTLE_ENDIAN__ #undef WORDS_BIGENDIAN #endif #endif I'm puzzled why WORDS_BIGENDIAN is undefined if both __BIG_ENDIAN__ and __LITTLE_ENDIAN__ are undefined. Surely in that case WORDS_BIGENDIAN should be left alone (if it is already defined). If there's a compiler for a bigendian architecture which doesn't define the gcc macros the we seem to get the wrong result. -- Robin Becker -- http://mail.python.org/mailman/listinfo/python-list
