Index: compiler-rt/lib/builtins/emutls.c
===================================================================
--- compiler-rt/lib/builtins/emutls.c
+++ compiler-rt/lib/builtins/emutls.c
@@ -182,8 +182,10 @@
   }
 }
 
+#if defined(_MSC_VER)
 #pragma warning(push)
 #pragma warning(disable : 4100)
+#endif
 static BOOL CALLBACK emutls_init(PINIT_ONCE p0, PVOID p1, PVOID *p2) {
   emutls_mutex =
       (LPCRITICAL_SECTION)_aligned_malloc(sizeof(CRITICAL_SECTION), 16);
@@ -251,7 +253,9 @@
 
 #endif // __ATOMIC_RELEASE
 
+#if defined(_MSC_VER)
 #pragma warning(pop)
+#endif
 
 #endif // _WIN32