Linux 32-bit fix. We cannot allocate > 32MB for 32-bit mmap implementations which is causing issues getting SLIM to work. Also, we should explicitly disable in case it is stuck in someones ppsspp.ini. See: http://lxr.free-electrons.com/source/tools/perf/util/session.c#L1290
Blackberry/BSDs: Don't sync memory back to the underlying file. This is terrible on I/O performance. Linux already has this by default. See: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21820