Bug#953002: corsix-th: FTBFS with libsdl2 2.0.10+dfsg1-2

[Simon McVittie]

On Mon, 02 Mar 2020 at 22:20:28 +0100, Andreas Beckmann wrote:
> libsdl2 2.0.10+dfsg1-2 changed the installation layout and that broke
> SDL detection in corsix-th:
> 
> -- Could NOT find SDL (missing: SDL_INCLUDE_DIR)
> CMake Error at CorsixTH/CMakeLists.txt:110 (message):
>   Error: SDL library not found, it is required to build.  Make sure the path
>   is correctly defined or set the environment variable SDLDIR to the correct
>   location

I think this is a bug in SDL (#951087, proposed patch:
<https://salsa.debian.org/sdl-team/libsdl2/merge_requests/3>).

corsix-th might be able to work around it by relying on SDL >= 2.0.4
providing its own CMake integration (which presumably wasn't available when
corsix-th's build system was written), similar to
<https://github.com/JACoders/OpenJK/pull/1033>.

    smcv