IF ("${PROJECT_SOURCE_DIR}" STREQUAL "${ANOTHER_PROJ_SOURCE_DIR}")
  SET(BUILD_SHARED_LIBS 1)
  ADD_LIBRARY(testlib testlib.cxx)
  ADD_EXECUTABLE (simple simple.cxx)
  TARGET_LINK_LIBRARIES(simple testlib)
ENDIF ("${PROJECT_SOURCE_DIR}" STREQUAL "${ANOTHER_PROJ_SOURCE_DIR}")