[CMake] Automatic Building of dependencies

[William A. Hoffman]

At 09:49 AM 5/4/2006, Thomas.Voss at rub.de wrote:
>Hi,
>
>I've just started using cmake for building my projects and encountered the following
>problem:
>
>Assume the following dir structure:
>
>Toplevel
>    |
>    ----Application 1
>        |
>        ----cmake
>            |
>            ----CMakeLists.txt
>    |
>    ----Library 1
>        |
>        ----cmake
>            |
>            ----CMakeLists.txt
>    |
>    ----Library 2
>        |
>        ----cmake
>            |
>            ----CMakeLists.txt
>            
>The libraries depend on qt and include header-files that need to be processed by moc.
>
>How Do I tell cmake in the CMakeLists.txt of "Application 1" that it should build the
>libraries according to the CMakeLists.txt found in the library-specific cmake subdirs?
>
>ADD_SUBDIRECTORY() doesn't work as the moc_* files aren't generated.

Something like this should work:
ADD_SUBDIRECTORY(Library1)
ADD_SUBDIRECTORY(Library2)
ADD_SUBDIRECTORY(Application1)

The CMakeLists.txt file in Application1 should be something like this:
ADD_EXECUTABLE(Application1 ....)
# tell the application to link to the libraries 
# this will cause the libraries to be built before the application
# and the moc files should be generated as by-product of that build
TARGET_LINK_LIBRARIES(Application1 Library1 Library2)


-Bill