bug#7868: parallel-tests: avoid command-line length limit issue.

[Stefano Lattarini]

On 12/28/2011 08:27 PM, Bob Friesenhahn wrote:
> Sorry for top-posting.  I don't want to lose any text of the original mail.
> 
> I totally forgot that I had applied Ralf's patch to my 1.11.1 install. Now
> that I have updated GraphicsMagick to using Automake 1.11.2, the patch is no
> longer present and so 'make check' on MinGW/MSYS leads to this:
> 
> /usr/bin/csmake  check-TESTS check-local
> csmake[2]: Entering directory `/home/bfriesen/mingw/GM-16-static'
> csmake[3]: Entering directory `/home/bfriesen/mingw/GM-16-static'
> csmake[3]: execvp: /bin/sh: Invalid argument
> csmake[3]: *** [tests/constitute_char_bgr.log] Error 127
> csmake[3]: Leaving directory `/home/bfriesen/mingw/GM-16-static'
> csmake[2]: *** [check-TESTS] Error 2
> csmake[2]: Leaving directory `/home/bfriesen/mingw/GM-16-static'
> csmake[1]: *** [check-am] Error 2
> csmake[1]: Leaving directory `/home/bfriesen/mingw/GM-16-static'
> csmake: *** [check] Error 2
> 
> Today I lost more hair because I had totally forgotten about this issue and
> the problem was first noticed after making some changes to configure.ac.
> 
> Hopefully this problem can be resolved before Automake 1.12 is released.
> 
Let's start by exposing the problem once and for all.

What about the attached patch?  Tested on Debian unstable, NetBSD 5.1,
Cygwin 1.5.25 and Solaris 10, and it seems to correctly expose the problem
on all those systems.

Thanks,
  Stefano

0001-coverage-expose-automake-bug-7868.patch
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