Michael: > Hi Vincent - Thanks for your reply; it seems like that thread from a > while back said pretty much what you're now saying. So, what I'm trying > to do is create a configure-time test which first tries to compile a > "xgetbv" instruction, and if that succeeds then it tries to execute the > binary. If the first fails then the compiler does not support AVX; if > the first succeeds but the second fails then the CPU does not support > AVX. In this way, we can rule in our out using AVX during > configuration, and set some variables accordingly to be used during > building. This seems like the most reliable way to go, instead of > relying on the compiler version alone (which is what we were doing), or > just compiling (which clang does OK). - MLD
Read the message I just posted: you can use AVX with Clang, provided you have the required hardware, but if your assembly is written in the GNU x86-64 dialect, then you’ll have to revamp some parts to make the Clang assembler (llvm-mc) happy. Vincent _______________________________________________ macports-dev mailing list [email protected] http://lists.macosforge.org/mailman/listinfo/macports-dev
