Compile with recursive mutexes for emscripten Emscripten actually does support recursive mutexes, so no need to use SDL's fake recursive code. Background: #5428, #5479
diff --git a/include/SDL_config_emscripten.h b/include/SDL_config_emscripten.h
index 7efe323..028777d 100644
--- a/include/SDL_config_emscripten.h
+++ b/include/SDL_config_emscripten.h
@@ -185,6 +185,7 @@
/* Enable various threading systems */
#ifdef __EMSCRIPTEN_PTHREADS__
#define SDL_THREAD_PTHREAD 1
+#define SDL_THREAD_PTHREAD_RECURSIVE_MUTEX 1
#endif
/* Enable various timer systems */