2010/7/28 Michael Wild <them...@gmail.com>:
> Are those libraries only "convenience" libraries? I.e. are you ever going to 
> install them? If not, just list the source-files in the top-level 
> CMakeLists.txt:
>
>
> add_executable(super-duper
>  modul1/modul1.c
>  module2/module2.c
>  )

Even if they are not going to be *installed* as separate libraries,
there are realistic cases in which your approach is not ideal:

Let's assume that these are third-party libraries which come with
their own (and maybe even conflicting) compilation settings (compiler
flags, internal include files, ...). The top-level CMakeLists.txt
would have to
- "know" all the sources contributing to the libraries and
- reflect all these internals with respect to different compilation
settings on a source-by-source basis.

And if you are going to update one of these libraries you would have
to reflect all the necessary changes in the top-level file.

Kind regards
Ingolf
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