> > a configure test only proves whether the build machine can deal > > with the flag, not whether the machine the executables will > > ultimately run on knows what the flag means. We cannot assume that > > the build and execution boxes are the same. (In general, > > AC_TRY_RUN tests are best avoided because of this.) > > I understand why that is important in general, but as a shop which > builds from source, and is fine with a separate build for each > hardware model / OS version combination, it would be great if any > optimizations which are only available if you *do* assume that the > build machine and the run machine are the same (or at lease > identical) could be enabled with some configure switch. Maybe > something like --enable-platform-specific-optimizations. > > I don't know if any such possible optimizations currently exist, I'm > just saying that if any are identified, it would be nice to have the > option of using them.
I can't say the right way to go for now, but I'd like binary packages could enjoy the effect of my patch as far as possible so that I made lwarx hint test run in configure runtime. Regards, Manabu Ori