On Wed, Sep 17, 2014 at 04:21:42PM +0200, Jakub Jelinek wrote:
> >From -v dump, that sounds like a bug in mkoffload, which has been found
> properly relatively to the gcc driver or whatever.
>
> /usr/src/gcc-git/objinst/usr/local/bin/../libexec/gcc/x86_64-unknown-linux-gnu/5.0.0//accel/x86_64-intelmic-linux-gnu/mkoffload
> @/tmp/ccS6Q83l
> collect2: error trying to exec
> '/usr/local/bin/x86_64-intelmic-linux-gnu-g++': execvp: No such file or
> directory
> lto-wrapper: fatal error:
> /usr/src/gcc-git/objinst/usr/local/bin/../libexec/gcc/x86_64-unknown-linux-gnu/5.0.0//accel/x86_64-intelmic-linux-gnu/mkoffload
> terminated with signal 11 [Segmentation fault], core dumped
> compilation terminated.
> /usr/bin/ld: lto-wrapper failed
> collect2: error: ld returned 1 exit status
>
In the same setup, I've added (as root)
#!/bin/sh
exec /usr/src/gcc-git/objinst/usr/local/bin/x86_64-intelmic-linux-gnu-g++ "$@"
script to /usr/local/bin/x86_64-intelmic-linux-gnu-g++ .
But things don't work in that case either, the error is now:
/usr/src/gcc-git/objinst/usr/local/bin/../libexec/gcc/x86_64-unknown-linux-gnu/5.0.0//accel/x86_64-intelmic-linux-gnu/mkoffload
@/tmp/cc0nIjXd
x86_64-intelmic-linux-gnu-g++: error trying to exec 'cc1plus': execvp: No such
file or directory
lto-wrapper: fatal error:
/usr/src/gcc-git/objinst/usr/local/bin/../libexec/gcc/x86_64-unknown-linux-gnu/5.0.0//accel/x86_64-intelmic-linux-gnu/mkoffload
terminated with signal 11 [Segmentation fault], core dumped
compilation terminated.
/usr/bin/ld: lto-wrapper failed
collect2: error: ld returned 1 exit status
which presumably means that some undesirable vars from host environment
were kept by mkoffload in the environment for the offloading compiler
and that has the undesirable effect of affecting how the offloading
compiler driver works. Because, if I invoke
/usr/local/bin/x86_64-intelmic-linux-gnu-g++ manually, it can find cc1plus
just fine.
Jakub
