problem with parallel make

[Andreas Jaeger <aj at suse dot de>]

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 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'}

What's wrong here?  Any ideas how to fix this?

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

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