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Old 2nd July 2008
thevirtuesofxen thevirtuesofxen is offline
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Default quick question about optimizations in /etc/make.conf

Hi!
I'm still learning my way around FreeBSD. I just installed a system with Xorg and GNOME. I am about to rebuild world, and I want to enable the CPU optimizations. I successfully rebuilt world on Gentoo using optimizations, but I took a shortcut and used 'march=native'. I don't know how to find the cpu info on FreeBSD. I remember it was 'cat /proc/cpuinfo' on Gentoo, and I know that I have a single core Prescott CPU that accepts SSE3 instruction. Could somebody get me started on these optimizations? I know people say that the speed increase is negligible, but I notice a huge difference.
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Old 2nd July 2008
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% dmesg | grep -A 2 CPU:
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Old 3rd July 2008
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See the comments in /usr/share/examples/etc/make.conf for what you can put for CPUTYPE. Beyond setting CPUTYPE, you really shouldn't mess with compiler optimisation flags in FreeBSD. You'll break more things than you'll "fix".
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Old 7th July 2008
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You may also be interested by this live example of mine make.conf:
http://toya.net.pl/~vermaden/text/make.conf
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Old 11th July 2008
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the only changes i made in my make.conf was the cputype and the cflags option which is set to "-O2 -pipe".
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Old 11th July 2008
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Remove your CFLAGS setting. The default includes -O2, and a bunch of others that you just stripped out with your setting.
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Old 15th July 2008
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What are the defaults ?

Cause I've put -O -pipe to my servers (faster compilation than -O2)

Thanks.
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Old 15th July 2008
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The defaults are:
-fno-strict-aliasing -O2 -pipe
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