Because CI didn't cover this code we didn't know there were
warnings in these codepaths to address.
Not sure why GCC's -Wduplicated-branches is being emitted or how
exactly to fix it. It's easier to simply ignore it in this one
particular file.
Recently GitHub updated the ubuntu-latest images to point at Ubuntu
22 which broke CI for ths 2.6.x branch so let's stick to Ubuntu 20
until we can sort out what was failing.
The macos-latest image recently upgraded to macOS 12. This includes
the iOS 16 SDK which deprecates some features which we're using. The
short term fix is to just keep using macOS 11 for 2.6.x.
Ported sfml-pi DRM/KMS backend written by @mickelson
Port co-authored by @substring
Co-authored-by: Andrew Mickelson <andrew.mickelson@gmail.com>
Co-authored-by: Gil Delescluse <frog2wah@gmail.com>
When a single GitHub Action build fails, the other builds should not be
canceled, but instead should continue to build.
Since the matrix is setup on OS level, a failing build on one OS usually
doesn't mean it's broken for all OS.
