Fix inverted condition in _Atomic declaration
fixes
@@ -642,6 +642,7 @@ void gotoblas_profile_init(void);
void gotoblas_profile_quit(void);
#ifdef USE_OPENMP
+
#ifndef C_MSVC
int omp_in_parallel(void);
int omp_get_num_procs(void);
@@ -649,12 +650,15 @@ int omp_get_num_procs(void);
__declspec(dllimport) int __cdecl omp_in_parallel(void);
__declspec(dllimport) int __cdecl omp_get_num_procs(void);
#endif
+
#if (__STDC_VERSION__ >= 201112L)
+#include <stdatomic.h>
+#else
#ifndef _Atomic
#define _Atomic volatile
#endif
-#include <stdatomic.h>
#endif
+
#else
#ifdef __ELF__
int omp_in_parallel (void) __attribute__ ((weak));
