[CMake] Parallel build & test problem

[David Cole]

On Mon, May 23, 2011 at 4:13 AM, Marcel Loose <loose at astron.nl> wrote:

> Hi all,
>
> A colleague of mine reported a bug in our CMake-base build system when
> doing a parallel build of multiple targets where one of the targets is
> 'test'.
>
> <quote>
>        Running 'make -j16 tMutex test' (or any test other than tMutex)
>        for example will result in building tMutex in parallel to
>        testing it.
>
>        Expected behaviour is first building tMutex, followed by running
>        the tests.
> </quote>
>
> Is this indeed a bug? Either in our build system or in CMake?
> AFAIK it is not possible to define dependencies between the 'test'
> target and the target to build the test program. Correct?
>
> Best regards,
> Marcel Loose.
>
>
> --
> Marcel Loose
> Senior Software Engineer, Computing Group R&D, Astron, the Netherlands
>
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To the best of my knowledge you can only do a parallel make of one target at
a time.

The best way to do what you want is to do two parallel make runs in
sequence, like this:

  make -j16 tMutex
  make -j16 test

The test target is defined by CMake, though, and runs all tests.

HTH,
David
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