set proper CMAKE_INSTALL_RPATH for _caffe.so and tools

cmake/Misc.cmake

@@ -32,6 +32,11 @@ endif()
 set(CMAKE_INSTALL_RPATH_USE_LINK_PATH TRUE CACHE BOOLEAN "Use link paths for shared library rpath")
 set(CMAKE_MACOSX_RPATH TRUE)
 
+list(FIND CMAKE_PLATFORM_IMPLICIT_LINK_DIRECTORIES ${CMAKE_INSTALL_PREFIX}/lib __is_systtem_dir)
+if(${__is_systtem_dir} STREQUAL -1)
+  set(CMAKE_INSTALL_RPATH ${CMAKE_INSTALL_PREFIX}/lib)
+endif()
+
 # ---[ Funny target
 if(UNIX OR APPLE)
   add_custom_target(symlink_to_build COMMAND "ln" "-sf" "${PROJECT_BINARY_DIR}" "${PROJECT_SOURCE_DIR}/build"