[MSVC] Silence -Wnon-virtual-dtor on DIA APIs

Differential Revision: https://reviews.llvm.org/D116313

Author: aganea

clang/lib/Driver/ToolChains/MSVCSetupApi.h

@@ -28,6 +28,11 @@
 
 #pragma once
 
+#ifdef __clang__
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wnon-virtual-dtor"
+#endif
+
 // Constants
 //
 #ifndef E_NOTFOUND
@@ -512,3 +517,7 @@ STDMETHODIMP GetSetupConfiguration(_Out_ ISetupConfiguration **ppConfiguration,
 #ifdef __cplusplus
 }
 #endif
+
+#ifdef __clang__
+#pragma clang diagnostic pop
+#endif

llvm/lib/DebugInfo/PDB/CMakeLists.txt

@@ -4,7 +4,7 @@ macro(add_pdb_impl_folder group)
 endmacro()
 
 if(LLVM_ENABLE_DIA_SDK)
-  include_directories(${MSVC_DIA_SDK_DIR}/include)
+  include_directories(SYSTEM ${MSVC_DIA_SDK_DIR}/include)
   set(LIBPDB_LINK_FOLDERS "${MSVC_DIA_SDK_DIR}\\lib")
 
   if ("$ENV{VSCMD_ARG_TGT_ARCH}" STREQUAL "arm64")