Re: parallel-tests: avoid command-line length limit issue.

[Stefano Lattarini]

On 12/29/2011 12:26 AM, Stefano Lattarini wrote:
> 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.
> 
> [SNIP]
>
OK, I hope I've finally managed to partially fix this incredibly annoying bug
-- I say "partially" because the fix is sadly *for GNU make*.  Even more sadly,
the solution is pretty hacky and somewhat brittle.   Still, it should cause no
regression with the non-GNU makes (as they will continue to use the old
implementation), and I have verified that it works with at least all the GNU
make versions >= 3.78.

I'm posting the patches here for early feedback (note that the second one still
needs a commit message and possibly some polishing), with the hope that someone
can suggest a less hacky solution.

Regards,
  Stefano

0001-coverage-expose-automake-bug-7868.patch
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0002-fix-the-bug-for-GNU-make.patch
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