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On Wednesday 08 September 2004 21:11, Klavs Klavsen wrote: |
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> Chris Gianelloni said: |
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> [SNIP] |
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> |
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> > Gentoo is not all about performance. While many of our users want to |
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> > squeeze the every drop of performance out of their systems, many use |
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> > Gentoo for any number of other reasons such as our philosophy, our |
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> > community, the manageability of portage, or even because they think |
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> > Larry the Cow just owns. |
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> |
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> hehe. I totally agree. I choose Gentoo for the flexibility, for instance |
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> in getting the programversions I want to use - except I'm sad that |
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> gcc-versions get phased out too quickly IMHO, so I can't easily choose to |
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> stay with an "old" gcc like 3.2.2 - without running into packages I |
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> suddenly can't upgrade automatically, because they depend on a newer GCC, |
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> which I can see no reason for them to do. |
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|
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Most applications should not explicitly depend on a specific version of the |
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compiler. There are however some serious bugs in certain compiler versions |
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that show up in certain complex applications (like openoffice). Those bugs |
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are sometimes a reason to stop support for that particular version (although |
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not using -march=pentium4 stops most 3.2.x family problems) |
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> |
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> You are probably right - especially when I'm told that gcc-3.5 has great |
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> profiling capabilities (GIMPLE - whatever that is :) - which I agree would |
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> be the better solution (so people can easily optimize their machine - |
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> doing profiles for their usage). |
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|
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According to wikipedia and the gcc website it is an intermediate machine |
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independent language that is used for optimization. |
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|
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> The idea would ofcourse be that, only the "obvious" programs would be |
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> tested - but if profiling were implemented/possible with gcc-3.5 and |
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> portage easily - I'm fairly certain that would be of more value (would |
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> that also help select the right CFLAGS ?) |
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|
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Easy profiling mainly shows where bottlenecks are (not the subtle ones that |
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involve the cpu cache for example, for that you might want to try the |
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valgrind cachegrind module) |
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|
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Paul |
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|
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-- |
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Paul de Vrieze |
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Gentoo Developer |
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Mail: pauldv@g.o |
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Homepage: http://www.devrieze.net |
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