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I use the flags from the Safe_Cflags article on the wiki ( |
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http://gentoo-wiki.com/Safe_Cflag ). So far they haven't caused me any |
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headaches. |
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|
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CHOST="alpha-unknown-linux-gnu" |
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CFLAGS="-mieee -O2 -mcpu=ev56 -pipe" |
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CXXFLAGS="${CFLAGS}" |
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|
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> What level of optimizations flags are recommended? |
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On all of the Gentoo systems I've set up I've used -O2. I use it over |
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-O3 for a number of reasons. One, I cannot tell the difference in |
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terms of speed between something that is compiled with -O2 vs. -O3. |
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Two, emerge times are longer if you use -O3. Three, sometimes using |
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too many optimizations screws things up. (see |
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http://bugs.gentoo.org/74072 ). |
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|
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-Thomas |
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|
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-- |
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