"Compatibility with CMake < 3.5 has been removed from CMake" - SDL update needed?

[kouta-kun]

CMake 4 recently removed compatibility with CMake projects targeted at CMake < 3.5, and as it happens the version of SDL that Rust-SDL2 points at is targeted at CMake 3.0:

https://github.com/libsdl-org/SDL/blob/07d0f51fa292895443f563f0cbde4cb3802d87fa/CMakeLists.txt#L5

Thankfully, a version of SDL2 (branch 2.30.x) was eventually released with CMake 3.10 as a minimum requirement, which should make it work with modern versions of CMake:

https://github.com/libsdl-org/SDL/blob/release-2.30.x/CMakeLists.txt#L8

Simply doing checkout tags/release-2.30.12 seems to work (compiles), but at least one test fails:

failures:

---- pixels::test_pixel_format_enum stdout ----

thread 'pixels::test_pixel_format_enum' panicked at src/sdl2/pixels.rs:574:13:
assertion `left == right` failed
  left: RGB888
 right: YUY2
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

Not sure if any mainstream distros are already shipping CMake 4, but at least Arch already is so it probably won't be long before this breaks Debian/Ubuntu/etc.

[kouta-kun]

Also (but not related to CMake), due to implicit casting of pointers releases before 2.32.x will break with newer versions of GCC: libsdl-org/SDL#12572