3473537ec6
Improve the find_package calls with vtk-9 cmake config files. In this version, the variable VTK_MODULES_ENABLED has been replaced by VTK_AVAILABLE_COMPONENTS. The additional change of the components names, which have their 'vtk' prefix removed in vtk-9 is not covered by this patch for compatibility reasons. See the forum thread noted below for a description of this: https://forum.freecadweb.org/viewtopic.php?f=4&t=60068 Signed-off-by: Bernd Waibel <waebbl-gentoo@posteo.net>
This folder will contain an individual cmake file for each FreeCAD "helper".
A "helper" should be a macro or function that tries (as much as possible) to adhere to the UNIX philosophy - in other words, it should strive to do one thing and do it well.
The idea here is to break up the cmake build system into smaller, more manageable chunks. This should make maintenance easier, and should also make troubleshooting a bit less painful. Finally, it should also clean up our top-level CMakeLists.txt file a bit, making it bit easier for new developers to jump in and see what's what.
NOTE: CMake has a very distinct difference between its macros and its functions. Namely, a function creates its own SCOPE, whereas a macro essentially executes in the calling scope. There are also some specifics of how arguments are managed.
In general:
- If you use a macro, be careful modifying arguments - you may get surprises.
- If you use a function, make sure to use set(.... PARENT_SCOPE) for variables that should be available outside of the function.