[CMake] CMake and it's invocation from MS VC7

[David Cole]

You also get this behavior if you are used to using VC's "Rebuild 
Solution"... With CMake, you never want to use "Rebuild Solution" - 
always "Build Solution"...

David


Brad King wrote:

> Steve Johns wrote:
>
>> I think I don't understand something about CMake, though.  When I 
>> build any of the 5 projects that were created (the 3 file 
>> directories, ALL_BUILD, and INSTALL), the first thing that happens, 
>> according to the build log, is that CMake is invoked.
>>
>> Could someone kindly tell me why this happens, if it needs to happen, 
>> what I can do about it, and comment in general about what role CMake 
>> plays in the MS IDE after the solution/projects are created in the 
>> first place?
>>
>> My impression was that CMake created the native build environment (in 
>> this case the MS solution/projects) where none existed before, and 
>> that was the extent of it's job.  It seems to want to continue to be 
>> a "player", and so there is clearly something I don't understand.
>
>
> CMake takes responsibility both for generating projects and for 
> keeping them up to date as sources (CMakeLists.txt code) change.  
> There are custom build rules in the project files to compare the time 
> CMake last generated the project to the time of the CMake code 
> specifying the project.  If the project is older than the input code 
> then CMake regenerates the build system.
>
>> I'm also constantly getting messages that my project has changed 
>> "outside the IDE", and I wonder if /expect that CMake is causing this 
>> ...
>
>
> This is what it is doing when it reruns during the build.
>
> When things are working properly you should get this behavior only 
> when CMakeLists.txt files are changed.  If you are getting it every 
> time you build then something is wrong.  Make sure your sources are 
> not dated in the future.
>
> -Brad
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