Michael Hope <michael.h...@linaro.org> writes:
> Hi there.  I've looked further into the intermittent
> gcc/testsuite/g++.dg/cdce3.C test failures.  Taking Ira's
> vectoriser-only fix-pr51301-4.6 branch and comparing it with it's
> predecessor r106845:
>  * cdce3.o itself is identical across compilers
>  * Fault occurs in a parallel test run as part of the normal auto build
>  * Fault occurs every time
>  * Fault occurs with a manual 'make check-gcc RUNTESTFLAGS="dg.exp=cdce*'
>  * Fault doesn't occur when building from the command line
>  * Fault doesn't occur after updating binutils
>
> I'm suspicious of the linker.  The auto builders are Natty based and
> come with ld 2.21.0.20110327.  Updating them to Oneiric's
> 2.21.53.20110810 clears the problem.

Hmm, FWIW, this reminds me of the problems that I had reproducing the
chromium linker bug from way back (which I think was also on Natty).
The bug only triggered for me when building under dpkg-buildpackage.
If I ran (seemingly) the same command by hand, it worked OK.

Richard

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