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Re: problem with parallel make


On Sat, Oct 18, 2003 at 04:23:25PM +0200, Andreas Jaeger wrote:
> Josef Zlomek <zlomj9am@artax.karlin.mff.cuni.cz> writes:
> 
> >> building with multilibs on x86_64-linux-gnu I get a build failure with
> >> a parallel make (-j2 -l7) on my dual Opteron system:
> >> /usr/bin/ld: warning: i386 architecture of input file `.libs/allchblk.o' is incompatible with
> >>  i386:x86-64 output
> >
> > The bug only apperas when -j2 is used, with -j4 it is gone. I expect when more
> > processes are used something gets build soon enough.
> >
> > Following patch caused or exposed it.
> >
> > 2003-08-27  Daniel Jacobowitz  <drow@mvista.com>
> >
> >         * configure.in: Set RAW_CXX_FOR_TARGET if unset.
> >         * configure: Regenerated.
> >
> > Josef
> 
> Thanks for tracking this down.  Daniel and Nathanael, do you have any
> ideas on how to fix this?

It must be an exposed rather than created... RAW_CXX_FOR_TARGET used to
be left unset, which would cause build failures in my environment.  I
can't see how this could cause -m32 to disappear, especially not from
CC.

> 
> Cheers,
> Andreas
> 
> >> The problem is that -m32 is not passed to GCC.  If I run a sequential
> >> build, this works for me, just the parallel one fails on this machine
> >> (it works on another where I tested it).
> >> 
> >> Looking at x86_64-suse-linux-gnu/32/config.cache I noticed:
> >> 
> >> ac_cv_prog_CC=${ac_cv_prog_CC='/builds/gcc/misc/gcc/xgcc -B/builds/gcc/misc/gcc/
> >>  -B/opt/gcc/3.4-devel/x86_64-suse-linux-gnu/bin/ -B/opt/gcc/3.4-devel/x86_64-sus
> >> e-linux-gnu/lib/ -isystem /opt/gcc/3.4-devel/x86_64-suse-linux-gnu/include -isys
> >> tem /opt/gcc/3.4-devel/x86_64-suse-linux-gnu/sys-include'}
> >> ac_cv_prog_CPP=${ac_cv_prog_CPP='/builds/gcc/misc/gcc/xgcc -B/builds/gcc/misc/gc
> >> c/ -B/opt/gcc/3.4-devel/x86_64-suse-linux-gnu/bin/ -B/opt/gcc/3.4-devel/x86_64-s
> >> use-linux-gnu/lib/ -isystem /opt/gcc/3.4-devel/x86_64-suse-linux-gnu/include -is
> >> ystem /opt/gcc/3.4-devel/x86_64-suse-linux-gnu/sys-include -E'}
> >> 
> >> So, the -m32 is missing.  But it's there for CXXCPP:
> >> ac_cv_prog_CXXCPP=${ac_cv_prog_CXXCPP='/builds/gcc/misc/gcc/xgcc -shared-libgcc 
> >> -B/builds/gcc/misc/gcc/ -nostdinc++ -L/builds/gcc/misc/x86_64-suse-linux-gnu/32/
> >> libstdc++-v3/src -L/builds/gcc/misc/x86_64-suse-linux-gnu/32/libstdc++-v3/src/.l
> >> ibs -B/opt/gcc/3.4-devel/x86_64-suse-linux-gnu/bin/ -B/opt/gcc/3.4-devel/x86_64-
> >> suse-linux-gnu/lib/ -isystem /opt/gcc/3.4-devel/x86_64-suse-linux-gnu/include -i
> >> system /opt/gcc/3.4-devel/x86_64-suse-linux-gnu/sys-include  -m32 -E'}
> >
> >
> 
> Andreas
> -- 
>  Andreas Jaeger, aj@suse.de, http://www.suse.de/~aj
>   SuSE Linux AG, Deutschherrnstr. 15-19, 90429 Nürnberg, Germany
>    GPG fingerprint = 93A3 365E CE47 B889 DF7F  FED1 389A 563C C272 A126



-- 
Daniel Jacobowitz
MontaVista Software                         Debian GNU/Linux Developer


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