broken pipe to m4 when trying to build certain file

[Oliver Schmidt]

Hi,

I've got a weird problem: When trying to build the file conf-parse.y (attached) 
from libsemanage, a `bison conf-parse.y` doesn't produce any output but get's 
killed with a SIGPIPE (see attached strace log), apparently while trying to 
write to m4.

Interestingly this only happens with the bison-3.0.4 from the distro Mer (using 
either m4 1.4.16 or 1.4.18), but not with bison-3.0.4 + m4-1.4.18 from openSUSE.
So apparently something seems to be wrong with the Mer build (see [1]) of bison 
or m4, does someone have any idea what that could be?

confused regards,
Oliver Schmidt

[1] https://git.merproject.org/mer-core/bison

conf-parse.y
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strace_bison.log
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signature.asc
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