[CMake] Ctest building with Multiple Processors

[Iosif Neitzke]

Does ctest -j <jobs>, or ctest --parallel <jobs> behave differently?

http://www.cmake.org/cmake/help/v3.0/manual/ctest.1.html

On Wed, Sep 3, 2014 at 2:31 PM, Michael Jackson
<mike.jackson at bluequartz.net> wrote:
> I am exploring CTest/CDash with out project and I was trying to figure out how to have CTest use all my cores for builds. So far no luck with some snippets from Google. So far I have the following in a file called CTestConfig.cmake at the top level of my project.
>
>  set(CTEST_PROJECT_NAME "DREAM3D")
> set(CTEST_NIGHTLY_START_TIME "01:00:00 UTC")
>
> set(CTEST_DROP_METHOD "http")
> set(CTEST_DROP_SITE "my.cdash.org")
> set(CTEST_DROP_LOCATION "/submit.php?project=DREAM3D")
> set(CTEST_DROP_SITE_CDASH TRUE)
>
> # Use multiple CPU cores to build
> include(ProcessorCount)
> ProcessorCount(N)
> if(NOT N EQUAL 0)
>   if(NOT WIN32)
>     set(CTEST_BUILD_FLAGS "-j${N}")
>   endif(NOT WIN32)
>   set(ctest_test_args ${ctest_test_args} PARALLEL_LEVEL ${N})
>
> endif()
>
>
> And then I execute CTest like this from my terminal
>
> ctest -D Experimental
>
>
> but monitoring my processors says that only a single processor is being used.
>
> Thanks for any help
>
> ---
> Mike Jackson                 www.bluequartz.net
>
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