Possibility of a ${srcdir}/info/dir target race?

[Rob Browning]

I'm currently investigating a 24.4 build failure on s390x which is
beginning to look like it might be a make -j2 race (the Debian buildds
use -j2) with respect to the info/dir target:

  https://buildd.debian.org/status/package.php?p=emacs24&suite=experimental

  Success: 
https://buildd.debian.org/status/fetch.php?pkg=emacs24&arch=i386&ver=24.4%2B1-1&stamp=1413961402
  Failure: 
https://buildd.debian.org/status/fetch.php?pkg=emacs24&arch=s390x&ver=24.4%2B1-1&stamp=1413962421

Running the build in a sid chroot on zelenka (s390x porter box) by hand,
both with (and once) without -j2 works fine, but of course that doesn't
provide any definitive answer.

And please note that the problem might well be the fault of (my) Debian
modifications, but I thought I'd go ahead and ask here (while still
investigating) in case this rings a bell.

Thanks
-- 
Rob Browning
rlb @defaultvalue.org and @debian.org
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