Oh, and if you try secondlife PKGBUILD I sent, please note that we
have distcc (pacman -Sy distcc), so you could get much faster results
using this and removing DISTCC=no.
Also FMod and x86_64 are said to not work together.
Anyway, the SConstruct file (some kind of Makefile in Python) does
deactivate FMod on x86_64.
But of course, avoiding to touch these PKGBUILDs could help you very
much keep your mental sanity.