Index: flang/runtime/time-intrinsic.h
===================================================================
--- flang/runtime/time-intrinsic.h
+++ flang/runtime/time-intrinsic.h
@@ -22,6 +22,9 @@
 // real kind.
 double RTNAME(CpuTime)();
 
+void RTNAME(SystemClock)(CppTypeFor<TypeCategory::Integer, 8> *Count,
+    CppTypeFor<TypeCategory::Real, 8> *CountRate,
+    CppTypeFor<TypeCategory::Integer, 8> *CountMax);
 } // extern "C"
 } // namespace Fortran::runtime
 #endif // FORTRAN_RUNTIME_TIME_INTRINSIC_H_