[CMake] making two targets with similar names

[Bill Hoffman]

Juan Sanchez wrote:
> I am having the following issue.  I want to create both a libFOO.a and a
> libFOO.so.  Note that the libFOO.so is composed of more sources than the
> libFOO.a.
>
> I use OUTPUT_NAME in order so they have the same name.  I can make the
> FOOSTATIC, libFOO.a, target, just fine.  However, making the FOODYNAMIC,
> libFOO.so, target deletes libFOO.a, just before linking against it.
> This causes a build error.
>
> Is there anyway to prevent this from happening?
>
>
> ADD_LIBRARY (FOOSTATIC  STATIC ${UDB_SRCS})
> ADD_LIBRARY (FOODYNAMIC SHARED ${PERL_SRCS})
>
> target_link_libraries(FOODYNAMIC  FOOSTATIC)
>
> SET_TARGET_PROPERTIES(FOODYNAMIC PROPERTIES
>     LINK_FLAGS --whole-archive
>     OUTPUT_NAME   FOO
> )
>
> SET_TARGET_PROPERTIES(FOOSTATIC PROPERTIES
>     OUTPUT_NAME   FOO
> )
>   
See the documentation for OUTPUT_NAME:

When a library is built CMake by default generates code to remove any 
existing library using all possible names. This is needed to support 
libraries that switch between STATIC and SHARED by a user option. 
However when using OUTPUT_NAME to build a static and shared library of 
the same name using different logical target names the two targets will 
remove each other's files. This can be prevented by setting the 
CLEAN_DIRECT_OUTPUT property to 1.


-Bill