https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100758
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> --- (In reply to Erich Eckner from comment #2) > We use this in archlinux32 to detect, if we can install packages, that have > sse2 opcodes: > > If one sets "Architecture = auto" in /etc/pacman.conf, uname only gives > "i686" in both cases (this is how archlinux does/did the probing), and then, > we probe for sse2 to check, if we really are "i686" or "pentium4" (our > nomenclature for "i686" + sse2). This works well on amd and intel cpus, but > fails on via cpus. > > Details about expected features: https://archlinux32.org/architecture/ > > We can add some cumbersome code which probes for sse2, but I'd really prefer > some compiler builtin instead :-) Eh, including cpuid.h and using that to check for SSE2 shouldn't be too hard (or parsing /proc/cpuinfo).
