[CMake] CMake & subdirectories

[Dan Tihelka]

Hi all,

I have just started to use the CMake, and I have already ordered the 
book. However, until the book will come, I need to solve the following 
problem.

I have a library (let us call it MyLibrary), which I need to build using 
CMake -- the library was created several years ago, but it was built 
under MSVC only. Now I need to build it for Linux, and possibly other 
unix platforms.

The source code of the library is organized as follows:

src (contains only global *.h)
  |
  + IO (contains *h as well as *.cpp)
  |
  + Math (contains *h as well as *.cpp)
  |
  +  many others, even more recursive.


OK, I made the following files:

CMakeLists.txt:

    PROJECT(MyLibrary)
    INCLUDE_DIRECTORIES( ... )
    SUBDIRS(src)

src/CMakeLists.txt::

    SUBDIRS(IO Math  --and other recursive directories --- )


src/IO/CMakeLists.txt::

        SET(SRC --- all .cpp files listed here)
        ADD_LIBRARY(MyLibrary${SRC})


src/Math/CMakeLists.txt::

        SET(SRC --- all .cpp files listed here)
        ADD_LIBRARY(MyLibrary${SRC})

and similarly for all the other directories. When a directory contains 
other subdirectories, SUBDIRS() is also listed in the CMakeLists, just 
after the ADD_LIBRARY.

But, there is the problem. all seems to be OK, but  libMyLibrary.a is 
created in each subdirectory, containing only sources from that 
subdirectory. However, I need one library in src/ directory, containing 
sources from all the subdirectories. What is wrong on my definitions?  
Did I forget something?

Thank you very much for your help,
Dan


P.S. Unfortunately, the source cannot be just copied into one directory, 
as it is under CVS control.