[CMake] add_custom_command weirdness

[David Cole]

That would happen if hcparser.y were changed. Does that file also change? Is
it generated?


2010/3/30 Christoph Höger <choeger at cs.tu-berlin.de>

> Hi all,
>
> I have a buildsystem here for a project containing several subprojects. All
> those subprojects have their own CMakeLists.txt in a subfolder.
> One of those subprojects needs to run a script to generate some
> sourcefiles:
>
> add_custom_command(OUTPUT ${typesh} ${typesc}
>        COMMAND ${binbash} ${PROJECT_SOURCE_DIR}/mosilac/mktypes.sh
>        DEPENDS ${src}/hcparser.y
>        WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}/mosilac)
>
> This does work. As it does in other places. But in that single place I have
> a problem when working on other parts of the buildsystem:
> Whenever I change a CMakeLists.txt file subsequent make calls lead to a
> re-generation of the output files, although they're unchanged.
>
> Does anyone know why this happens?
>
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