# SDL_THREAD_ANNOTATION_ATTRIBUTE__ Enable thread safety attributes, only with clang. ## Header File Defined in [<SDL3/SDL_mutex.h>](https://github.com/libsdl-org/SDL/blob/main/include/SDL3/SDL_mutex.h) ## Syntax ```c #define SDL_THREAD_ANNOTATION_ATTRIBUTE__(x) __attribute__((x)) ``` ## Remarks The attributes can be safely erased when compiling with other compilers. To enable analysis, set these environment variables before running cmake: ```bash export CC=clang export CFLAGS="-DSDL_THREAD_SAFETY_ANALYSIS -Wthread-safety" ``` ---- [CategoryAPI](CategoryAPI), [CategoryAPIMacro](CategoryAPIMacro), [CategoryMutex](CategoryMutex)