Failed to build with cmake < 3.11

[eagafonov]

$ cmake --version
cmake version 3.7.2
 
 
$ cmake ..
CMake Error at CMakeLists.txt:4 (cmake_policy):
  Policy "CMP0072" is not known to this version of CMake.

Commit https://github.com/OpenHantek/openhantek/commit/9d0ebc7701d9a66934bb95ac01db6c71df87dabb forces CMake Policy 0072 which is available since CMake 3.11 so the build fails with any earlier versions.

The possible fix is to replace faulty line with equivalent version

set(OpenGL_GL_PREFERENCE GLVND)

[davidgraeff]

Correct. If you open a pull request, I would happily accept it.