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Hi all :D |
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I think what "-march=your_arch -O2" it's enough, because -O3 it's highest |
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but have some details |
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(http://gentoo-wiki.com/CFLAGS#-O2_or_-O3.3F). My guess is "-march=your_arch |
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-O2". I was compiled my entire system with those flags and my applications |
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no matter which have a very good functionality... |
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I hope give you some help to make your decision... |
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On 4/9/07, Alexander Skwar <listen@×××××××××××××××.name> wrote: |
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> |
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> · maxim wexler <blissfix@×××××.com>: |
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> |
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> > One suggests using -O3 -pipe, the other, -O2 without |
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> > the pipe. |
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> |
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> The resulting binaries of a -O2 -pipe compile will be |
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> the same as those of a -O2 (no pipe) compile. |
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> |
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> See |
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> http://gcc.gnu.org/onlinedocs/gcc-4.1.2/gcc/Overall-Options.html#index-pipe-81 |
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> |
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> > How much difference does this make? Is the extra level |
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> > of optimization with pipe the equivalent of the lower |
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> > level without? |
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> |
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> There's no extra level of optimization. |
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> |
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> So the question boils down to: Is -O3 better than -O2? Answer: Depends. |
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> On a system with not that much cache, it might not be. |
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> |
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> Alexander Skwar |
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> -- |
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> BOFH Excuse #16: |
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> |
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> somebody was calculating pi on the server |
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> |
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> |
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> -- |
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> gentoo-user@g.o mailing list |
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> |
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> |
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|
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-- |
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['Cause without love I won't survive, I love you]. I |
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|
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Francisco Rivas |
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2.6.19-gentoo-r5 x86 |
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udev v087 gnome 2.16.2 |
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xorg-x11-7.1 hotplug v20040923-r2 |
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e-mail : fjrivas@××××××.ve |
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msn : taken2k4@×××××.com |
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