Coverage tracer extension fails to build with VS2019 #2145
Description
When trying to compile the tracer extension with VS2019, it fails due to the recently introduced dependency on c11 stdatomic.h
coverage\ctracer\util.h(8): fatal error C1083: Cannot
open include file: 'stdatomic.h': No such file or directory
Is a newer MSVC (newer than 14.29 I believe) now a requirement for building on Windows?
Would it be possible to provide a fallback for older MSVC versions?
Here's one possible fallback that Claude Code suggested:
+#if defined(_MSC_VER) && _MSC_VER < 1939
+#define _Atomic volatile
+#define atomic_load(p) (*(p))
+#define atomic_store(p, v) (*(p) = (v))
+#else
#include <stdatomic.h>
+#endif