Also remove the now useless options (like IRRLICHT_INCLUDE_DIR)
and update download instructions, CI and similar.
Co-authored-by: sfan5 <sfan5@live.de>
With the CMake changes to IrrlichtMt, it's now possible to use a target for IrrlichtMt.
Besides greatly improving the ease of setting up IrrlichtMt for users building the client, it removes the need for Minetest's CMake to include transitive dependencies such as image libraries, cleaning it up a tiny bit. The PR works by finding the IrrlichtMt package and linking to the target it provides. If the package isn't found and it isn't building the client, it will still fall back to using just the headers of old Irrlicht or IrrlichtMt.
Use posix mingw-w64 toolchain on Win64 builds where applicable, avoids
many build errors when using buildwin64.sh to build 64 bit builds on
Ubuntu based Linux distributions
* Do proper out-of-tree builds with buildbot
* Don't write to bin/ for cross builds
* This allows safely building multiple builds from the same source dir, e.g. with the buildbot.
* Disable Gettext (by default) and Freetype (entirely) for server builds
PR created under the employment of EvidenceBKidscode
* Variables to set git repositories urls (allows to build from another repo)
* Variables to set git branch to build from (allows to build from non-master branch)
* Variables to change built name
* Make -j uses the proper number of processors (autodetect)
* Changed toolchain from win32 to adpat it to non-debian distros
* Implement win32 & win64 builds in Gitlab CI + pkg improvements
* windows buildbot: split build & deploy steps
* move deb artifacts to root folder to have a nicer artifact
* add windows build + packaging on xenial
* Move GCC to GCC 6 & GCC 7
* Move Clang to Clang 3.6 & Clang 4.0
* LINT moves from Clang 3.9 to Clang 4.0
* Move XCode 7.3 to 8.0
* Use more travis tricks to install compilers instead of adding complexity to our build script
* Clang format fixes on checked files (compat Cpp11 instead of Cpp03)
* Mingw GCC update from 4.8.4 to 5.3 (Ubuntu Xenial)
* Drop mingw cmake generated files and add them to gitignore
