diff --git a/compiler-rt/lib/profile/GCDAProfiling.c b/compiler-rt/lib/profile/GCDAProfiling.c
--- a/compiler-rt/lib/profile/GCDAProfiling.c
+++ b/compiler-rt/lib/profile/GCDAProfiling.c
@@ -71,7 +71,6 @@
 static __inline void gcov_flush_unlock() {
   pthread_mutex_unlock(&gcov_flush_mutex);
 }
-static __inline void gcov_flush_init_once(void) {}
 #else
 #include <windows.h>
 static SRWLOCK gcov_flush_mutex = SRWLOCK_INIT;