cmake: enable CMP0042 to use @rpath

CMakeLists.txt

@@ -2,6 +2,7 @@ if(${CMAKE_VERSION} VERSION_GREATER "3.4")
     CMAKE_MINIMUM_REQUIRED (VERSION 3.5)
 else()
     CMAKE_MINIMUM_REQUIRED (VERSION 2.8.12)
+	CMAKE_POLICY(SET CMP0042 NEW)
     IF ((CMAKE_VERSION VERSION_GREATER 3.1) OR
         (CMAKE_VERSION VERSION_EQUAL 3.1))
         CMAKE_POLICY(SET CMP0054 NEW)
@@ -52,18 +53,6 @@ CONFIGURE_FILE (
     @ONLY
 )
 
-IF (APPLE)
-    SET(CMAKE_MACOSX_RPATH ON)
-    SET(CMAKE_SKIP_BUILD_RPATH FALSE)
-    SET(CMAKE_BUILD_WITH_INSTALL_RPATH FALSE)
-    SET(CMAKE_INSTALL_RPATH "${CMAKE_INSTALL_PREFIX}/lib")
-    SET(CMAKE_INSTALL_RPATH_USE_LINK_PATH TRUE)
-    LIST(FIND CMAKE_PLATFORM_IMPLICIT_LINK_DIRECTORIES "${CMAKE_INSTALL_PREFIX}/lib" isSystemDir)
-    IF ("${isSystemDir}" STREQUAL "-1")
-        SET(CMAKE_INSTALL_RPATH "${CMAKE_INSTALL_PREFIX}/lib")
-    ENDIF ()
-ENDIF ()
-
 IF (MSGPACK_32BIT)
    IF ("${CMAKE_C_COMPILER_ID}" STREQUAL "GNU")
       SET (CMAKE_C_FLAGS "-m32 ${CMAKE_C_FLAGS}")