title: Getting source and destination must be different error while building project
body: <p>I am getting this error while building project. Trying to add a new library in android-studio. Is there anybody who has an idea basically I am trying to create a new library here.</p>
  
  <p>Options tried:</p>
  
  <ol>
  <li><p>Manually deleted build</p></li>
  <li><p>Invaildate cache/restart</p></li>
  <li><p>Gradle clean build cache</p></li>
  <li><p>Build->Clean Project</p>
  
  <p>But build is failing.</p>
  
  <p>Source C:\Users\abc\AndroidStudioProjects\Events\app\build\intermediates\cmake\debug\obj\armeabi-v7a\libnative-lib.so and destination C:\Users\abc\AndroidStudioProjects\Events\app\build\intermediates\cmake\debug\obj\armeabi-v7a\libnative-lib.so must be different</p></li>
  </ol>
  
  <p>CMakeLists.txt I am using for the same:</p>
  
  <pre><code># For more information about using CMake with Android Studio, read the
  # documentation: https://d.android.com/studio/projects/add-native-code.html
  
  # Sets the minimum version of CMake required to build the native library.
  
  cmake_minimum_required(VERSION 3.4.1)
  
  # Creates and names a library, sets it as either STATIC
  # or SHARED, and provides the relative paths to its source code.
  # You can define multiple libraries, and CMake builds them for you.
  # Gradle automatically packages shared libraries with your APK.
  
  add_library( # Sets the name of the library.
               native-lib
  
               # Sets the library as a shared library.
               SHARED
  
               # Provides a relative path to your source file(s).
               native-lib.cpp
          )
  
  add_library (
          testLib
          SHARED
          TestClassesManager.cpp
  )
  # Searches for a specified prebuilt library and stores the path as a
  # variable. Because CMake includes system libraries in the search path by
  # default, you only need to specify the name of the public NDK library
  # you want to add. CMake verifies that the library exists before
  # completing its build.
  
  find_library( # Sets the name of the path variable.
                log-lib
  
                # Specifies the name of the NDK library that
                # you want CMake to locate.
                log )
  
  # Specifies libraries CMake should link to your target library. You
  # can link multiple libraries, such as libraries you define in this
  # build script, prebuilt third-party libraries, or system libraries.
  
  
  target_link_libraries( # Specifies the target library.
                         native-lib
  
                         # Links the target library to the log library
                         # included in the NDK.
                         ${log-lib}
  
          )
  
  target_link_libraries(
          testLib
  
          native-lib
  )
  </code></pre>
  
  <p>The error goes away if I am replacing </p>
  
  <pre><code>target_link_libraries(
          testLib
  
          native-lib
  )
  </code></pre>
  
  <p>by </p>
  
  <pre><code>target_link_libraries(
          testLib
      ${log-lib}
  
  )
  </code></pre>
  
  <p>But I want to link both libraries. But it is giving above error. Please help.</p>