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On 6/2/10 8:43 PM, Jack Howarth wrote:
> On Wed, Jun 02, 2010 at 08:36:58PM -0400, Alexander Hansen wrote:
> On 6/2/10 8:26 PM, Jack Howarth wrote:
>>>> On Wed, Jun 02, 2010 at 08:04:20PM -0400, Benjamin Reed wrote:
>>>> On 6/2/10 7:55 PM, Jack Howarth wrote:
>>>>>>> One possible workaround might be to change gcc45.info
>>>>>>> to reduce the number of parallel builds so that the
>>>>>>> load sensitivity is reduced. So instead of using...
>>>>>>>
>>>>>>> num_cpu=$(echo `sysctl -n hw.ncpu`)
>>>>>>> make -j $num_cpu
>>>>>>>
>>>>>>> we would reduce num_cpu by one if greater
>>>>>>> than one so that the build is either serial
>>>>>>> or leaves a free core whenever building in parallel.
>>>>>>> This won't 'fix' the problem but it might make
>>>>>>> it less likely.
>>>>
>>>> So if GCC's build is not repeatably compatible with -jN, then it
>>>> should probably not be doing it by default. :P
>>>>
>>>>> This is a recent regression upstream. The question is do you
>>>>> penalize all users with multiple core machines for those
>>>>> unlucky users running two cores at high load? As I said before,
>>>>> a rational (and less extreme) workaround would be to leave
>>>>> a free core available to reduce the load on the machine.
>>>>> I build gcc trunk nightly and have never seen this failure
>>>>> on a dual quad.
>>>>> Jack
>>>>
>>>>
>>>>
>
> I'll point out that I had my single instance of this failure on a
> single-core powerpc, and had no such problem building on a two-core
> Macbook under load.
>
>> Are you sure you're not confusing the issue with...
>
>> cp %b/gcc/config/darwin-sections.def
>> %i/lib/gcc4.5/lib/gcc/%m-apple-darwin${darwinvers}/%v/plugin/include/config
>
>> on powerpc? I suspect these are totally different problems. The compiler
>> plugin support apparently isn't installing the plugin header directory
>> on powerpc-apple-darwin. As I mentioned before, this cp comamnd can be
>> skipped on powerpc because there will never be a dragonegg compiler
>> plugin for powerpc (only i386 and x86_64 darwin).
>
>
I'm not confusing anything. I mentioned earlier in this thread that I
had an instance of _this_ problem:
http://article.gmane.org/gmane.os.macosx.fink.devel/19413
"I got the same thing on my 10.5.8/powerpc machine once, but it didn't
show up again. Peter O'Gorman also said on IRC that this seemed to be
intermittent, so it might be worth just trying again."
- --
Alexander Hansen
Fink User Liaison
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