[CMake] Combining several static libraries into a single static library

[David Cole]

Seems like your best bet using CMake would be to use OBJECT libraries 
for your Project01 through Project99 -- and then use STATIC libraries 
for your ReleaseLibraries, which combine the objects of the appropriate 
project libraries...

You may need to use dummy source files for the static libs, depending 
on your build environment. See the Tests/ObjectLibrary/CMakeLists.txt 
in the CMake source tree for an example of all the different 
workarounds there are for older Visual Studios and Xcode...

http://cmake.org/gitweb?p=cmake.git;a=blob;f=Tests/ObjectLibrary/CMakeLists.txt;h=0aeefaa48753feec0c5e0af2f850b32d6cd28279;hb=55d6aa36a522f2dd7849ccd53d9e743a88f8c7a1

Another alternative would be to use STATIC libraries all the way 
through and let CMake do its transitive linking thing via 
target_link_libraries, but then your executables that link to them 
would need access to all of the static libraries including the 
Project01 to Project99 ones, even at the very client level where you 
are no doubt trying to simplify the build experience for those that 
require your release libraries. Good luck!


HTH,
David C.