On Thu, 17 Jul 2014 10:30:05 +0300 Samuli Suominen [off-list ref]
wrote:

If you run with:

$ export MAKEFLAGS="-j9"
$ make install install-systemd

As in, combine "install" and "install-systemd" in the same command using
parallel make,
the content of .service files could end up in .rules, or otherway around
because GNU
make fill run them in parallel and the commands might ran at the same
time, and both
use same variables $file and same temporary files .install.tmp

This was reported at,
https://bugs.gentoo.org/show_bug.cgi?id=517218

The immediate workaround is,

$ export MAKEFLAGS="-j9"
$ make install
$ make install-systemd

And the attach patch makes it full proof so they can be ran at the same
line.

Thanks,
Samuli

Hi,
 thanks for the bug report and the patch!

I don't think it is necessary to change the name for the variable (file ->
file1, file2 or file3).  Just leave it as 'file'.
However changing the name is important.  Could you send a patch which just
does that, and I'll apply it.

Also if the patch could be included inline in the mail, rather than as an
attachment, that would be nice.

(But if you don't want to bother, I'll make the fix anyway and credit you).

Thanks,
NeilBrown