[cmake-developers] Testing Config generator expression

[David Cole]

On Thu, Nov 1, 2012 at 11:17 AM, Brad King <brad.king at kitware.com> wrote:
> On 11/01/2012 11:06 AM, Stephen Kelly wrote:
>> RunCMake.cmake seems to use:
>>
>>   execute_process(
>>     COMMAND ${CMAKE_COMMAND} "${RunCMake_TEST_SOURCE_DIR}"
>>               -G "${RunCMake_GENERATOR}" -DRunCMake_TEST=${test}
>>
>> I'm not sure if I should just add API for a -
>> DCMAKE_BUILD_TYPE=${RunCMake_BUILD_TYPE} there and just limit the test for
>> this to the makefile generators?
>
> No, the test infrastructure should not need modification for this.
> Under IDE generators the generator expression will be evaluated
> once for every configuration.  Perhaps RunCMake isn't the best
> category of tests after all.
>
> Instead update Tests/GeneratorExpression to do
>
>  -Dtest_config_debug=$<CONFIG:Debug>$<CONFIG:DEBUG>$<CONFIG:DeBuG>
>  -Dtest_config_release=$<CONFIG:Release>$<CONFIG:RELEASE>$<CONFIG:ReLeAsE>
>  ...other two configs...
>
> Then in check.cmake verify that each variable is set to all 0s
> or all 1s.
>
> -Brad
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Consider also the CTestConfig set of tests. They run ctest with -C
configname to run all 4 types of dashboards (via -S script *and* via
ctest -D args) regardless of the build type of the outer CMake
dashboard. See "add_config_tests" in Tests/CMakeLists.txt and its
associated files in the Tests/CTestConfig directory.

You could do something similar where the ctest -S script only runs the
configure step, but exercise all 4 well-known config types that way.

HTH,
David