Refactor cpuflags into a common part (cpuflags.sh), which calls the
appropriate per OS (subr_NetBSD, subr_SunOS or subr_Linux) and per
compiler (subr_gcc) portions
- Add some additional x86 flags for gcc 3.x
- Allow the path to cc to be specified as an argument to cpuflags
- Use both the previous to handle the gcc3 package
- Add an 'unsupported' optimize_gcc.mk which... to quote its comments:
"This file is 'experimental' - which is doublespeak for unspeakably
ugly, and probably quite broken by design.
The intention is to pass additional flags to gcc to further optimise
generated code. It _will_ make it impossible to debug, may fail to
compile some code, and even generate curdled binaries. It is completely
unsupported. Any questions should be directed to <abs@netbsd.org>.
