Detect CPU features at runtime via cpuid - code borrowed from
libavutil.
Availability of cpuid is not checked since pentium3 supports it
and that was the minimum requirement anyway.
Only features enabled at compile time will be available.
Forced MMX/SSE/SSE2/SSE3 and it passed all tests via:
./doom3.x86_64 +disconnect +set s_noSound 1 +testSIMD
This kills the funky GL logging stubs, which unnecessarily
complicates the build process (think future cmake).
As for logging GL calls: Use apitrace for that
https://github.com/apitrace/apitrace
Thread return types are different between platforms, and its
probably not a good idea to return something of a different size,
cast the callback and expect it to not crash.
the address of ‘hwparams’ will always evaluate as ‘true’
This was only in idAudioHardwareALSA::Initialize(), add the
missing return statement too while I'm at it.
