this requires some ad-hoc code to work with both the C and the CPP
version of libcerf.

CMake: simplification and modernization

Extend them to CMakeLists.txt,
and bundle the checks in one CMake module.

cmake/bornagain/modules -> cmake/modules
cmake/bornagain/scripts -> cmake/configurables
cmake/generic/modules   -> cmake/extensions

CMake: remove options PYTHON2 (never again) and OPENGL (always on)

Expand include paths and guards; simplify CMake scripts

As recommended by
https://google.github.io/styleguide/cppguide.html#The__define_Guard

CMake: modernize in view of vcpkg

Unit tests now under CTest control, and some little work on CMake and Windows dependences

Wuttke, Joachim authored 4 years ago and Wuttke, Joachim committed 4 years ago

Bug came from my misunderstanding CMake syntax

not just for debugging, keep it in the long run:
onlys so we get info about what DLLs are packed
into the executable

option -v (verbose) is not helpful

Wuttke, Joachim authored 4 years ago and Wuttke, Joachim committed 4 years ago

Our patch, https://gitlab.kitware.com/cmake/cmake/-/merge_requests/4934,
is expected to be released with CMake 3.19. Therefore we shall removed
FindTIFF.cmake from the BornAgain sources, once our minimum required
CMake version has been incremented accordingly.