> To: port-i386@netbsd.org
> Subject: gcc on x86 - any cool gimmicks?
>
> It just occurred to me:  By default, gcc is building 386-compatible binaries
> with reasonably general optimization.  Does gcc know enough to optimize
> well for PII or PIII processors?  Is doing this remotely safe or supported?
yes. it's 30-50% speedup.

i added to /usr/src/gnu/usr.bin/egcs

CPPFLAGS+=      -DHAVE_CONFIG_H -DPREFIX=\"/usr\" \
                -DDEFAULT_TARGET_VERSION=\"${EGCS_VERSION}\" \
                -DDEFAULT_TARGET_MACHINE=\"${MACHINE_GNU_ARCH}-netbsd\" \
                -DSTANDARD_STARTFILE_PREFIX=\"/usr/lib/\" \
                -DSTANDARD_EXEC_PREFIX=\"/usr/libexec/\" \
                -DTOOLDIR_BASE_PREFIX=\"/usr/libexec/\" \

extra line                 -DTARGET_CPU_DEFAULT=2

in my 1.5.3 sources, did make;make install;make clean in this directory
then did normal build of everything to /altroot, packed everything to
.tgz, unpacked it with --unlink to /

so i have pentium optimized binaries and pentium-defaulting cc, then
recompiled my custom kernel, then packages from /usr/src/pkgsrc

i can send you already done .tgz if you like.