[CMake] need two compilation to achieve success

[Bill Hoffman]

eial at cs.bgu.ac.il wrote:

> 
> thanks for the tip though but my current problem is in regards to the
> linking of external libs, I've used to add them to the
> TARGET_LINK_LIBRARIES but it was suggested here not to use it in that
> way. 
OK, I think I see the problem.  For external libraries, you should use 
find_library and link them in the target_link_libraries.  For 
internal(things built by CMake), you should just use the name.

For example

add_library(foo SHARED foo.c)
find_library(BAR_LIB bar)  # find path to bar
target_link_libraries(foo ${BAR_LIB}) # link bar to foo
add_executable(car car.c)
target_link_libraries(car foo) # this will link foo and bar to car

-Bill