[CMake] target_link_libraries difficulties

[Michael Jackson]

Not sure if this is recommended or not with CMake 2.8 BUT:

[mjackson at Ferb]$ cmake --help-command link_directories
cmake version 2.6-patch 4
------------------------------------------------------------------------------
SingleItem

   link_directories
        Specify directories in which the linker will look for libraries.

          link_directories(directory1 directory2 ...)

        Specify the paths in which the linker should search for  
libraries.
        The command will apply only to targets created after it is  
called.
        For historical reasons, relative paths given to this command are
        passed to the linker unchanged (unlike many CMake commands which
        interpret them relative to the current source directory).



set (CMAKE_BUILD_TYPE "Config-1")
link_directories ( ${SOME_SOURCE_DIR}/${CMAKE_BUILD_TYPE} )
include (${SOME_SOURCE_DIR}/${CMAKE_BUILD_TYPE}/Libraries.cmake)

add_executable(MyExe ${srcs})
target_link_libraries(MyExe ${MyLinkLibraries})

#--- Libraries.cmake file
set (MyLinkLibraries "Somelib1 SOmeLib2")

Thoughts/comments from the community?
___________________________________________________________
Mike Jackson                      www.bluequartz.net
Principal Software Engineer       mike.jackson at bluequartz.net
BlueQuartz Software               Dayton, Ohio


On Apr 1, 2010, at 2:52 PM, Benoit Thomas wrote:

> Hello,
>
> I'm trying to find a work around since target_link_libraries cannot  
> be used per-configuration. I know that out-of-build could solve my  
> problem, but my team is currently migrating from Visual Studio to  
> cmake, so I need something which "feel" more like Visual Studio.
>
> My current project has around 20 configurations (debug, release,  
> many many more, mostly combination of debug_something,  
> release_something, etc.) and some of those configuration requires to  
> include special external libraries, some not. Since I cannot  
> classify all my configurations as debug or release, solution like  
> target_link_libraries (target my_library debug|optimized) did not  
> work.
>
> To put it simply, what I'm trying to achieve is something like:
>
> add_executable (exec)
> add_library (my_lib)
>
> set_target_properties (exec PROPERTIES COMPILE_DEFINITIONS_CONFIG1  
> USING_MY_LIB)
> set_target_properties (exec PROPERTIES COMPILE_DEFINITIONS_CONFIG2  
> NOT_USING_MY_LIB)
>
> # should only link the library under CONFIG1
> target_link_libraries (exec my_library)
>
> Thank you,
> Ben.
>
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