https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86306
--- Comment #2 from zhonghao at pku dot org.cn --- (In reply to Jonathan Wakely from comment #1) > It's correctly rejected by GCC because _Atomic is a C keyword, not a C++ one. > > Please try to understand the code before filing bugs, and consider if it's > really a bug. The original report (https://bugs.llvm.org/show_bug.cgi?id=22043) mentioned a bug in the c++ component of clang. The code is in C++, right?