gcc -O1 -fomit-frame-pointer

This will be used to compile .c files.

-O1 is generally better than -O6 for hand-optimized code, since gcc
doesn't understand the Pentium.

Always use -fomit-frame-pointer; this frees up a register.

With gcc 2.7 and above, use -malign-double on the Pentium to force
8-byte data alignment.

See http://pobox.com/~djb/djbfft.html for sample compiler options and
timings.
