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Re: /usr/bin/m4: internal error detected

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 <bug-m4@gnu.org>: 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.


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

 .''`.  John Paul Adrian Glaubitz
: :' :  Debian Developer - glaubitz@debian.org
`. `'   Freie Universitaet Berlin - glaubitz@physik.fu-berlin.de
  `-    GPG: 62FF 8A75 84E0 2956 9546  0006 7426 3B37 F5B5 F913

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