[CMake] Getting if custom target is set

[Alexander.Camek at elektrobit.com]

Hi Phillip,

Thanks for your help.

> -----Original Message-----
> From: philiplowman at gmail.com [mailto:philiplowman at gmail.com] 
> <Alexander.Camek at elektrobit.com> wrote:
> 
> 
> 	Hi folks,
> 	
> 	I have got a project split up into a lot of single project.
> 	So in my ROOR dir I have got a CMakeLists.txt which 
> defines a "master" PROJECT().
> 	Each subdirectory added by the master project adds in 
> its CMakeLists.txt its own PROJECT() in order to build alone.
> 	
> 	Now I add a new command ADD_CUSTOM_TARGET(lint ) in my 
> master project in order to do a make lint.
> 	This works fine if everybody uses the whole project. 
> But if he uses only a subproject as standalone this doesn't work.
> 	It doesn't know the custom target. But if I add this to 
> the subprojects cmake warns me about "CMP0002".
> 	
> 	What I want to do is now to check if my custom target 
> was set and if not I want to set it in the subproject.
> 	
> 	Something like that:
> 	GET_TARGET_EXISTS(LINT_SET lint)
> 	
> 	IF(NOT LINT_SET)
> 	  ADD_CUSTOM_TARGET(lint )
> 	ENDIF(NOT LINT_SET)
> 	
> 	How can I do that?
> 
> 
> I'm not completely sure what you're asking for, but the IF() 
> command does support checking for targets if that's what 
> you're looking for:
> 
> if(TARGET target-name)
> http://www.cmake.org/cmake/help/cmake2.6docs.html

That was exactly what I am looking for. So simply....
Thought I had to use the correct property by get_target_property() or one other of that, so I did't look at the IF command.

Greetings

Alexander


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