[CMake] Correct way to make an arbitrary file trigger a reconfigure...

Sergey Lekhanov slekhano at gmail.com
Mon Oct 14 21:30:00 EDT 2013


Hi Kris,




I have done that by following:

1) use Ninja Generator;

2) include empty "rerun.cmake" file, I put this file into binary dir, so I need a patch;

3) add a patch to Ninja Generator to correctly write dependencies for "build.ninja" from included cmake files, if cmake file is in the binary directory;

4) add a custom commands that check the new files and touching "rerun.cmake" file;

5) once "rerun.cmake" file is touched ninja will rerun cmake;




Best regards,

Sergey

—
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On Tue, Oct 15, 2013 at 7:02 AM, Malfettone, Kris <Kris.Malfettone at sig.com>
wrote:

> Anyone?
> From: cmake-bounces at cmake.org [mailto:cmake-bounces at cmake.org] On Behalf Of Malfettone, Kris
> Sent: Thursday, October 03, 2013 8:43 AM
> To: cmake at cmake.org
> Subject: [CMake] Correct way to make an arbitrary file trigger a reconfigure...
> Hi, I am trying to make cmake reconfigure whenever a certain file is touched.  This is because the file ends up listing out a set of directories that need to be built during the build.  Currently I do a trick where I use configure file to write out a file that will never be used but causes the input file to trigger reconfigures.
> For example:
> configure_file( file_i_care_about.txt ${CMAKE_CURRENT_BINARY_DIR}/tmp_file_that_isn't_used.txt )
> Is there another recommended way or is this the best approach.  I have tried searching for this but haven't found anything on it yet.
> -Kris
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