Defined in 3 files as a macro:
- external/apache2/llvm/dist/clang/lib/Headers/stdatomic.h, line 33 (as a macro)
- external/gpl3/gcc.old/dist/gcc/ginclude/stdatomic.h, line 102 (as a macro)
- external/gpl3/gcc.old/dist/libstdc++-v3/libsupc++/atomic_lockfree_defines.h, line 51 (as a macro)