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2007.10.23 19:17 "Re: universal build patch", by Andrey Kiselev
On Tue, Oct 23, 2007 at 11:12:33AM -0500, Bob Friesenhahn wrote: > >We can easily switch to this method instead of autoconf macro. I am > >only concerning about portability of this approach. > > It is 100% portable as long as you stick to using Apple's modified GCC > 4.X and OS X. Other targets are of no consequence. :-) > > Solaris defines _LITTLE_ENDIAN or _BIG_ENDIAN by including > <sys/types.h> ... > My feeling is that it the only completely correct approach is to > configure/build on each native target since otherwise some decisions > made may be wrong. Perhaps 32-bit OS X has managed to constrain PPC > and Intel differences to only endian order but this is the exception > rather than the rule. With Mac OS X Leopard (Arriving October 26) > perhaps the rules will change (the rules for Apple always change). I am sure that AC_C_BIGENDIAN macro can deduce the target byte order using some heuristics (that macro works in case of cross-compilation). So it can be adopted for OS X case too. The only problem for me is that I do not have a proper environment to develop and test such a macro. It shouldn't be too complicated. So my preference is to modify a test rather than libarary itself. I don't see any serious reason to replace the compile time switch. Best regards, Andrey -- Andrey V. Kiselev ICQ# 26871517