cmake: add rpath support

LRC was not resolvable if not installed in the client installation
path.

Change-Id: I21e840ed0360a0f30ef354b77518cc0a170377ba
Tuleap: #449

CMakeLists.txt

@@ -62,6 +62,12 @@ INCLUDE_DIRECTORIES(${CMAKE_CURRENT_BINARY_DIR})
 INCLUDE_DIRECTORIES( ${CMAKE_CURRENT_SOURCE_DIR})
 INCLUDE_DIRECTORIES(${LIB_RING_CLIENT_INCLUDE_DIR})
 
+SET(CMAKE_MACOSX_RPATH ON)
+SET(CMAKE_SKIP_BUILD_RPATH FALSE)
+SET(CMAKE_BUILD_WITH_INSTALL_RPATH FALSE)
+SET(CMAKE_INSTALL_RPATH "${CMAKE_CURRENT_SOURCE_DIR}")
+SET(CMAKE_INSTALL_RPATH_USE_LINK_PATH TRUE)
+
 MESSAGE("LRC is here:" ${LIB_RING_CLIENT_INCLUDE_DIR})
 SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -w")