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I've found that using gcc-3.4.4-r1 made a lot of python modules going with |
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"unresolved symbols", even when they compiled shamelessly |
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I switched to gcc-3.3.6 and then everything went right! |
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Just some food for thought. |
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Cheers |
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Douglas |
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On 1/13/06, Natanael Copa <mlists@××××××.org> wrote: |
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> |
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> On man, 2006-01-09 at 17:20 +0100, Peter S. Mazinger wrote: |
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> > On Sat, 7 Jan 2006, Mike Frysinger wrote: |
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> > |
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> > > On Saturday 07 January 2006 02:30, Natanael Copa wrote: |
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> > > > On lør, 2006-01-07 at 00:44 -0500, Mike Frysinger wrote: |
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> > > > > On Wednesday 04 January 2006 03:52, Natanael Copa wrote: |
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> > > > > > I got a report from someone who experienced lockups when using |
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> > > > > > gentoo-embedded built system (2.6.14-hardened-r1) |
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> |
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> > > > When I disabled "Configure standard kernel features (for small |
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> > > > systems)" (gcc -Os) the problem magically went away. |
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> > > |
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> > > the kernel can be pretty sensitive to optimizations |
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> > |
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> > if kernel is built w/ gcc-3.4.4 and -Os (at least I had that for 2.4.x |
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> > kernels) it "optimizes away" memcmp and the kernels have gotten a patch |
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> > to overcome this, the same problem does not occur w/ gcc-3.3.x. |
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> > |
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> > > > So I think its a bug in gcc version 3.4.4 (Gentoo Hardened 3.4.4-r1, |
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> > > > ssp-3.4.4-1.0, pie-8.7.8) |
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> > > > |
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> > > > Makes me nervous because I have built everything with -Os. |
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> > |
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> > I have built everything w/ -Os and do not have trouble w/ it |
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> |
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> I have researched this and found out that it is not the -Os itself that |
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> causes this, but it is something else under "Configure standard kernel |
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> features (for small systems)". I'm not sure of exactly what but I know |
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> at least that it is not "Optimize for size". I have turned all options |
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> under "Configure standard kernel features (for small systems)" except |
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> "Load all symbols for debugging/kksymoops" (including optimize for size |
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> (-Os)) and done the netload test all night. This morning the computer |
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> was still up. When I have an unstable kernel it hangs after an hour or |
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> two. |
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> |
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> I have tried to flip the "futex support" and that did not make any |
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> difference (anyone who know how this affects uclibc based apps btw? Do I |
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> need futex support?) |
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> |
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> I think I have narrowed down the problem to one of those: |
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> * BUG() support |
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> * Enable full-sized data structures for core |
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> * Enable eventpoll support |
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> |
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> But exactly what, I dont know. If anyone here have had any problems with |
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> disabling one of those, I'm very interested to hear. |
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> |
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> Lots of bla bla here, I just thought it could be good for you guys to |
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> know that turning off of those might make your kernel unstable, while |
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> -Os should be ok with current gcc. |
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> |
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> |
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> -- |
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> Natanael Copa |
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> |
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> -- |
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> gentoo-embedded@g.o mailing list |
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> |
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> |
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