workaround for gcc

Signed-off-by: Slice <sergey.slice@gmail.com>

OpenCorePkg

@@ -1 +1 @@
-Subproject commit c24f740b07c97efec0b772d914a9bdab448f3039
+Subproject commit a38c3a3705021e3808d62d135e0a4089d74986b5

rEFIt_UEFI/Platform/smbios.cpp

@@ -1454,10 +1454,14 @@ void PatchTableType17(const SmbiosInjectedSettings& smbiosSettings, XArray<UINT1
   XArray<UINT16>& mHandle17 = *mHandle17Ptr;
   XString8   deviceLocator;
   XString8   bankLocator;
+#if defined (__clang__)
 #pragma clang diagnostic push
 #pragma clang diagnostic ignored "-Wvla-extension"
+#endif
   UINT8   channelMap[mMemory17.size()]; // mMemory17.size() == SlotCounts
+#if defined (__clang__)
 #pragma clang diagnostic pop
+#endif
   UINT8   expectedCount = 0;
   UINT8   channels = 2;
   XBool insertingEmpty = true;

rEFIt_UEFI/PlatformPOSIX/posix/abort.cpp

@@ -38,9 +38,10 @@ static void panic_(const char* format, VA_LIST va)
   printf(FATAL_ERROR_MSG);
   abort();
 }
-
+#if defined (__clang__)
 #pragma clang diagnostic push
 #pragma clang diagnostic ignored "-Winvalid-noreturn"
+#endif
 
 void panic(const char* format, ...)
 {
@@ -59,7 +60,9 @@ void panic(const char* format, ...)
   panic_(format, va); // panic doesn't return
 #endif
 }
+#if defined (__clang__)
 #pragma clang diagnostic pop
+#endif
 
 /*
  * Future version to warn about problem but offer the possibility to try to continue