fix RPATH for OSX

Author: nim65s

src/CMakeLists.txt

@@ -173,7 +173,10 @@ add_library(${LIBRARY_NAME}
   ${${LIBRARY_NAME}_SOURCES}
   )
 
-set_target_properties(${PROJECT_NAME} PROPERTIES INSTALL_RPATH "\$ORIGIN")
+if(UNIX)
+  get_relative_rpath(${CMAKE_INSTALL_FULL_LIBDIR} ${PROJECT_NAME}_INSTALL_RPATH)
+  set_target_properties(${PROJECT_NAME} PROPERTIES INSTALL_RPATH "${${PROJECT_NAME}_INSTALL_RPATH}")
+endif()
 
 # IDE sources and headers sorting
 ADD_SOURCE_GROUP(${LIBRARY_NAME}_SOURCES)