On Sat, Dec 11, 2010 at 05:39, Bob Friesenhahn <bfriesen@xxxxxxxxxxxxxxxxxxx> wrote: > On Fri, 10 Dec 2010, Andrew W. Nosenko wrote: >> >> Excuse me? Why do you think that preprocessor should match the >> behavior of compiler??? > > Excuse me? Why do you think that the behavior of the compiler should be > consistent? :-) > >> Why, why system's /usr/bin/cpp that come from GCC should match to >> Clang's behavior? Or ICC's behavior? Remember: Accordingly to your >> logic, if it doesn't match, then it is invalid. Why? And if ICC and >> Clang interpret -1 >> 1 differently, then it renders GCC's CPP >> constantly invalid? > > Since you mention Clang (LLVM-based) then it is worth pointing out that > final code generation may be delayed and so it is possible that the CPU type > finally selected may not match the CPU type on which the original tests were > executed. Part of the behavior depends on the CPU. Yes. You absolutely right. And run-time check idea proposed by Ben is the best from the reliability point of view (of course after fixing the typo :-) -- Andrew W. Nosenko <andrew.w.nosenko@xxxxxxxxx> _______________________________________________ Autoconf mailing list Autoconf@xxxxxxx http://lists.gnu.org/mailman/listinfo/autoconf
