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List: cmake
Subject: Re: [CMake] ExternalProject_Add ALWAYS
From: Kevin Funk <krf () gmx ! de>
Date: 2013-12-01 11:37:32
Message-ID: 7045934.oZXzC4SlhX () kerberos
[Download RAW message or body]
Am Sonntag, 1. Dezember 2013, 10:53:08 schrieb James Turner:
> Hi,
>
> I am trying to force the BUILD step of an ExternalProject_Add target to be
> run - always. I have found several wiki articles, and references in the
> archives of this list, to setting an ALWAYS option for the stage I want to
> force to run each time. The problem is I can't find any documentation on
> the exact syntax to use - can someone please enlighten me? (This is for a
> project where the files are on the local disk when the build is run, but
> may change due to external sync mechanisms - right now the build system
> never notices this)
>
> I'm guessing it must be something like:
>
> ExternalProject_Add(Foo
> PREFIX ${CMAKE_BINARY_DIR}
> DOWNLOAD_COMMAND "" # no need to download
> BUILD_ALWAYS # <<< but is this correct?
> SOURCE_DIR ${CMAKE_CURRENT_LIST_DIR}/path/to/foo
> …...
> )
>
> Kind regards,
> James Turner
Heya,
Looks like you need to call ExternalProject_Add_Step() to create a custom step
for this. This function accepts 'ALWAYS'.
Signature:
ExternalProject_Add_Step(<name> <step>
[COMMAND cmd...]
[COMMENT "text..."]
[DEPENDEES steps...]
[DEPENDERS steps...]
[DEPENDS files...]
[ALWAYS 1]
[WORKING_DIRECTORY dir]
)
See section 'Adding Custom Steps' in:
http://www.kitware.com/media/html/BuildingExternalProjectsWithCMake2.8.html
And then just set the 'DEPENDEES' parameter to build, in order to have it run
during the build phase.
Greets
--
Kevin Funk
--
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