On Wed, Jun 02, 2010 at 08:36:58PM -0400, Alexander Hansen wrote:
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> 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).
>
> - --
> Alexander Hansen
> Fink User Liaison
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