> I read the gcc man page. It is not clear what -O implys. Is -O equal to > -O1 or -O2? If I wish to optimize making does it make sense to add > CFLAGS=-O2 in the make.conf(5)?
Hi, -O == -O1 (see `info gcc' -> Invoking GCC -> Optimize Options) It is recommended not to use anything higher than -O since GCC is known to procduce broken code on higher optimization levels. Depending on what gcc version you are using, also specifing CPUTYPE=... in /etc/make.conf might bring you troubles (for certain CPUs, e.g. athlon IIRC). Post the output of `gcc --version' and people will be able to tell you. What you could try is to use -O2 for some selected ports, but the question is whether you will see a measurable performance gain. Some ports that are known to build alright at -O2 (e.g. mplayer) have WITH_OPTIMIZED_CFLAGS knob. Regards, Simon
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