GNU bug report logs - #7868
parallel-tests and command-line length limit issue

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Message #47 received at 7868 <at> debbugs.gnu.org (full text, mbox):

From: Eric Blake <eblake <at> redhat.com>
To: Stefano Lattarini <stefano.lattarini <at> gmail.com>
Cc: Peter Rosin <peda <at> lysator.liu.se>, 7868 <at> debbugs.gnu.org,
	automake-patches <at> gnu.org, automake <at> gnu.org
Subject: Re: automake 1.11.3 check-TESTS and command line length
Date: Mon, 27 Feb 2012 13:05:25 -0700

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On 02/27/2012 12:52 PM, Stefano Lattarini wrote:
> [re-adding the relevant automake bug in CC]
> 
> Hi Peter, thanks for chiming in.
> 
> On 02/27/2012 12:15 PM, Peter Rosin wrote:
>>
>> I *think* the environment and the command line shares space (approx 64kB,

I can confirm this, based on my testing of Windows process spawning.

> So, basically, on MSYS, a:
> 
>   $ make TESTS="..."
> 
> invocation reduces the size available for the command lines of the make
> recipes, because the value of TESTS that gets exported in the environment
> eats away space that could be used by those command lines?  Oh joy ...

Yes.  Unlike on *ix systems, where argv and environ are independent
entities, Windows makes you deal with both limits at the same time, so
increasing the size of environ reduces the size permitted in argv.

-- 
Eric Blake   eblake <at> redhat.com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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