kc3-lang/SDL

2021-04-23T01:56:10

CMake: fixes to pthreads detection. changes unnecessary check_c_source_runs to check_c_source_compiles, removes the reduntant cross-compile check, and defines _GNU_SOURCE for PTHREAD_MUTEX_RECURSIVE checks just like the autotools version. Fixes: https://github.com/libsdl-org/SDL/issues/4262 Closes: https://github.com/libsdl-org/SDL/pull/4282