[PATCH] parallel-tests: fix another BSD parallel make issue

[Stefano Lattarini]

[CC:ing bug-autoconf for Yet Another BSD make Bug, in case someone
 cares to documenting it ...]

When BSD make is run in parallel mode, it apparently strips any leading
directory component from the automatic variable '$*' (of course, against
what POSIX mandates).  This is causing FreeBSD 9.0 make and NetBSD 5.1
make to spuriously fail with automake-generated test harnesses if subdir
tests are present *and* make is being run in parallel mode.  This issue
affects also the Automake own testsuite.

The attached patch should work around the problem.

I will test this patch more properly in the next few days, and apply it
if it causes no regression.  I'm posting it here in case anyone can spare
some time to eyeball it, give early feedback, or even test the patch.

Regards,
  Stefano

0001-parallel-tests-fix-another-BSD-parallel-make-issue.patch
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