The bad news:
1. gcc is still required -- clang can build the binaries, but
some self-tests will fail, unless all optimization was
disabled. This is, probably, due to some suspect code in
bytenumb.c -- would be good to investigate.
2. Building this port in parallel is still not possible -- the
Makefile is too convoluted and same sources are recompiled
multiple times with different #defines set.
The good news:
1. Resolve a large number of warnings.
2. Fix build on ia64 and sparc64 (tested on pluto and flame
respectively). Other platforms (alpha, powerpc?) have a
better chance of working now...
