catkin build can't find shared library from a dependent package

edit

I've Just started using catkin_tools, and catkin build. It seems to require more precicely specified CMakeLists.txt files, and this is causing my grief at the moment.

I have package_A that depends on package_B's shared library. They are both within the one workspace.
When I catkin build package_A, package_B is built first, and it's shared library is placed in devel/lib. However, when package_A is linked, I get an error saying it can't find the library generated by package_B.

In package_A's CMakeLists.txt:
- I have used find_package (package_B),
- I have included package_B in the catkin_package( CATKIN_DEPENDS ) section,
- I have package_B mentioned in the target_link_libraries for the package_A target.

In package_B's CMakeLists.txt:
- I have package_B mentioned in catkin_package ( LIBRARIES ) section.

If I add a line link_directories(${CATKIN_DEVEL_PREFIX}/lib}) then it works fine. However, this doesn't look like the proper solution to me.

Any suggestions on what I'm missing / doing wrong?

Cheers,
Nap

Here are the CMakeLists.txt files from the packages in full:

Package_A:

cmake_minimum_required(VERSION 2.8.3)
project(whiteboard_test)

find_package(catkin REQUIRED COMPONENTS gusimplewhiteboard)

catkin_package(
  INCLUDE_DIRS include
  CATKIN_DEPENDS gusimplewhiteboard
)

set(CMAKE_C_FLAGS "-std=c99")
set(CMAKE_CXX_FLAGS "-std=c++11 -DWHITEBOARD_POSTER_STRING_CONVERSION=1")
set(CMAKE_SHARED_LINKER_FLAGS "-Wl,-rpath -Wl,${CMAKE_INSTALL_PREFIX}/lib")

include_directories(
    include
    ${gusimplewhiteboard_INCLUDE_DIRS}
)

###  THIS LINE IS REQUIRED TO FIND THE LIBRARY????? ###
link_directories(${CATKIN_DEVEL_PREFIX}/lib)

add_executable(whiteboard_test
    src/whiteboard_test.cpp
)
target_link_libraries(whiteboard_test
    gusimplewhiteboard
    ${CMAKE_DL_LIBS}
    ${LIBDISPATCH_LIBRARIES}
    ${CMAKE_THREAD_LIBS_INIT}
    dispatch
)
add_dependencies(whiteboard_test
    gusimplewhiteboard
)

SOLVED BY:

Removing:

###  THIS LINE IS REQUIRED TO FIND THE LIBRARY????? ###
link_directories(${CATKIN_DEVEL_PREFIX}/lib)

and changing target_link_libraries statement to:

target_link_libraries(whiteboard_test
    ${catkin_LIBRARIES}
    ${CMAKE_DL_LIBS}
    ${LIBDISPATCH_LIBRARIES}
    ${CMAKE_THREAD_LIBS_INIT}
    dispatch
)