[CMake] Linker Include Path

[Matthias Schweinoch]

Hi all,


I'm using cmake (2.8.5) to build a set of C++ libraries. I have a 
project directory structure which is basically organized like this:


package/component/CMakeLists.txt
package/component/inc/foo.hpp
package/component/src/foo.cpp


Boiled down, my CMakeLists.txt for this component looks like this:


SET(HEADERS inc/foo.hpp)
SET(SOURCES src/foo.cpp)
SET(LIBS whatever)
INCLUDE_DIRECTORIES(inc)
ADD_LIBRARY(MyLib ${HEADERS} ${SOURCES})
TARGET_LINK_LIBRARIES(MyLib ${LIBRARIES})


This has worked fine for me. Now, however, I would like to add another 
subdirectory to the src tree (this has organizational reasons), 
resulting in something like this:


package/component/CMakeLists.txt
package/component/inc/foo.hpp
package/component/src/foo.cpp
package/component/src/xyz/xyz.cpp


I modified the SOURCES assignment in my CMakeLists.txt like so:


SET(SOURCES src/foo.cpp src/xyz/xyz.cpp)


While this does compile, it does not link. I assume that this is because 
the xyz.o is put in


CURRENT_BINARY_OUTPUT/xyz/xyz.o


and the linker does not include that subdirectory. If I move the source 
file up by one level (i.e. into the src directory), everything compiles 
and links just fine, but that's not really an acceptable solution. Is 
there some (portable) way to tell CMake to include the xyz output path 
so that xyz.o is found at link time?



Thanks in advance for your help!


   Matthias