diff options
Diffstat (limited to 'lib/gthreads.h')
| -rw-r--r-- | lib/gthreads.h | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/lib/gthreads.h b/lib/gthreads.h index 02ab8d3da9..8a4e9e444a 100644 --- a/lib/gthreads.h +++ b/lib/gthreads.h @@ -25,9 +25,11 @@ #include <config.h> -#ifdef HAVE_THREADS_H +/* Using a C99-only compiler installed in parallel with modern C11 environment + * will see HAVE_THREADS_H, but won't be able to use _Thread_local. */ +#if __STDC_VERSION__ >= 201112 && !defined(__STDC_NO_THREADS__) && defined(HAVE_THREADS_H) # include <threads.h> -#elif defined(__GNUC__) +#elif defined(__GNUC__) /* clang is also covered by __GNUC__ */ # define _Thread_local __thread #elif defined(_MSC_VER) # define _Thread_local __declspec(thread) |