title: No rule to make target makefile when using an external library
body: <p>I have attempted to troubleshoot this issue, but eventually I gave up and I cannot figure it out.</p>
  
  <p>I am using CLion and I need to import an external shared library (ts3client.so). Whatever I do, it fails in one way or another.</p>
  
  <p>Currently, I have the following:</p>
  
  <pre><code>cmake_minimum_required(VERSION 3.8)
  project(TSMusicBot)
  
  set(CMAKE_CXX_STANDARD 11)
  
  set(SOURCE_FILES src/main.cpp)
  
  # Teamspeak Libraries
  INCLUDE_DIRECTORIES(libs/ts3_sdk_3.0.4/include)
  
  ADD_LIBRARY (libts3client SHARED IMPORTED GLOBAL)
  SET_PROPERTY (
          TARGET libts3client PROPERTY IMPORTED_LOCATION
          libs/ts3_sdk_3.0.4/bin/linux/amd64/libts3client.so)
  
  add_executable(TSMusicBot ${SOURCE_FILES})
  
  target_link_libraries(TSMusicBot libts3client)
  </code></pre>
  
  <p>This gives me the following error:</p>
  
  <pre><code>make[2]: *** No rule to make target 'libs/ts3_sdk_3.0.4/bin/linux/amd64/libts3client.so', needed by 'TSMusicBot'.  Stop.
  CMakeFiles/Makefile2:67: recipe for target 'CMakeFiles/TSMusicBot.dir/all' failed
  make[1]: *** [CMakeFiles/TSMusicBot.dir/all] Error 2
  Makefile:83: recipe for target 'all' failed
  make: *** [all] Error 2
  </code></pre>
  
  <p>My directory structure is the following:
     src/main.cpp (the code)
     libs/ts3_sdk_3.0.4/include/teamspeak/ (which contains headers for the library)
     libs/ts3_sdk_3.0.4/bin/linux/amd64/libts3client.so (which is the library I cannot import).</p>