indi_mgenautoguider causing CMP0003 cmake warning

[TallFurryMan]

Describe the bug

When building, the following warning appears while configuring the build tree:

CMake Warning (dev) at indi-mgen/CMakeLists.txt:40 (add_executable):
  Policy CMP0003 should be set before this line.  Add code such as

    if(COMMAND cmake_policy)
      cmake_policy(SET CMP0003 NEW)
    endif(COMMAND cmake_policy)

  as early as possible but after the most recent call to
  cmake_minimum_required or cmake_policy(VERSION).  This warning appears
  because target "indi_mgenautoguider" links to some libraries for which the
  linker must search:

    pthread

  and other libraries with known full path:

    /usr/local/lib/libindidriver.so

  CMake is adding directories in the second list to the linker search path in
  case they are needed to find libraries from the first list (for backwards
  compatibility with CMake 2.4).  Set policy CMP0003 to OLD or NEW to enable
  or disable this behavior explicitly.  Run "cmake --help-policy CMP0003" for
  more information.
This warning is for project developers.  Use -Wno-dev to suppress it.

To Reproduce

1. Clone 3rd-party source tree
2. Configure the build with WITH_MGEN=ON (it is enabled by default)
3. Run the cmake configuration

Expected behavior
No warning should appear, CMakeLists.txt should be clean for indi_mgenautoguider.

Screenshots
n/a

Desktop (please complete the following information):

• OS: Ubuntu 18.04 i386
• Version: head

Log Files
n/a

[knro]

Any update on this? CMakelists.txt probably needs to be updated?