Re: [Qemu-devel] /usr/bin/m4: internal error detected

[John Paul Adrian Glaubitz]

Hi Daniel!

On 12/01/2017 06:08 AM, Daniel Kahn Gillmor wrote:
> ------------
> Copying file po/Makefile.in.in
> Copying file po/Makevars.template
> qemu: Unsupported syscall: -1
> m4: ../sysdeps/unix/sysv/linux/spawni.c:366: __spawnix: Assertion `ec >= 0' 
> failed.
> /usr/bin/m4: internal error detected; please report this bug to 
> <address@hidden>: Aborted
> -----------

This isn't a bug in m4 or anything architecture-specific, it's a regression
that was introduced by an upstream change in glibc [1] and mainly affects
qemu-user which we are using for m68k and sh4 [2].

While the change in glibc is most certainly correct (I don't have enough
background knowledge to comment on that), it broke qemu-user for everyone
and so far there is no possible fix in sight.

I am CC'ing this to libc-alpha in the hope that someone from glibc upstream
might give us a tip on how to resolve the issue. Not being able to use qemu-user
anymore is quite a deal breaker because lots of people use qemu-user for
debugging issues on foreign architectures which is now no longer possible.

Thanks,
Adrian

> [1] 
> https://sourceware.org/git/?p=glibc.git;a=commit;h=4b4d4056bb154603f36c6f8845757c1012758158
> [2] https://bugs.launchpad.net/qemu/+bug/1673976

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