Merged PR 12483430: build console* with clang

## Why is this change being made?

## What changed?

## How was the change tested?

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build console* with clang

Related work items: #56630064

Author: dragoss-yoda

src/host/directio.cpp

@@ -281,7 +281,7 @@ CATCH_RETURN();
                 // If .AsciiChar and .UnicodeChar have the same offset (since they're a union),
                 // we can just write the latter with a byte-sized value to set the former
                 // _and_ simultaneously clear the upper byte of .UnicodeChar to 0. Nice!
-                static_assert(offsetof(CHAR_INFO, Char.AsciiChar) == offsetof(CHAR_INFO, Char.UnicodeChar));
+                static_assert(__builtin_offsetof(CHAR_INFO, Char.AsciiChar) == __builtin_offsetof(CHAR_INFO, Char.UnicodeChar));
 
                 // Any time we see the lead flag, we presume there will be a trailing one following it.
                 // Giving us two bytes of space (one per cell in the ascii part of the character union)

src/host/exe/lto_symbols.inc

@@ -0,0 +1,3 @@
+LLVM_LTO_EXPORTED_SYMBOLS = \
+    _tlgDefineProvider_annotation__Tlgg_ConhostLauncherProviderProv \
+    wWinMain \

src/host/exe/sources

@@ -1,3 +1,5 @@
+!include $(BASEDIR)\onecore\windows\core\console\console_clang_feature.inc
+
 !include ..\sources.inc
 # -------------------------------------
 # Windows Console 
@@ -20,6 +22,10 @@ UMTYPE                  = windows
 UMENTRY                 = wwinmain
 TARGET_DESTINATION      = retail
 
+!if "$(CLANG_LTO)" == "1"
+!include lto_symbols.inc
+!endif
+
 # -------------------------------------
 # Build System Settings
 # -------------------------------------

src/host/sources.inc

@@ -89,10 +89,12 @@ SOURCES = \
 # Sources, Headers, and Libraries
 # -------------------------------------
 
+!if "$(USE_CLANG)" != "1"
 PRECOMPILED_CXX         = 1
 PRECOMPILED_INCLUDE     = ..\precomp.h
 PRECOMPILED_PCH         = precomp.pch
 PRECOMPILED_OBJ         = precomp.obj
+!endif
 
 INCLUDES = \
     $(INCLUDES); \

src/host/writeData.hpp

@@ -40,7 +40,7 @@ class WriteData : public IWaitRoutine
                 _Out_ NTSTATUS* const pReplyStatus,
                 _Out_ size_t* const pNumBytes,
                 _Out_ DWORD* const pControlKeyState,
-                _Out_ void* const pOutputData);
+                _Out_ void* const pOutputData) override;
 
 private:
     SCREEN_INFORMATION& _siContext;

src/inc/LibraryIncludes.h

@@ -101,6 +101,8 @@
 // The compiler doesn't like that. --> Suppress the warning.
 #pragma warning(push)
 #pragma warning(disable: 4324) // structure was padded due to alignment specifier
+// undefine BUILD_WINDOWS so that wrl/event.h doesn't include wrl/internalevent.h
+#undef BUILD_WINDOWS
 #include <wrl.h>
 #pragma warning(pop)
 

src/interactivity/win32/ConsoleControl.hpp

@@ -45,9 +45,9 @@ namespace Microsoft::Console::Interactivity::Win32
         };
 
         // IConsoleControl Members
-        [[nodiscard]] NTSTATUS NotifyConsoleApplication(_In_ DWORD dwProcessId);
-        [[nodiscard]] NTSTATUS SetForeground(_In_ HANDLE hProcess, _In_ BOOL fForeground);
-        [[nodiscard]] NTSTATUS EndTask(_In_ DWORD dwProcessId, _In_ DWORD dwEventType, _In_ ULONG ulCtrlFlags);
+        [[nodiscard]] NTSTATUS NotifyConsoleApplication(_In_ DWORD dwProcessId) override;
+        [[nodiscard]] NTSTATUS SetForeground(_In_ HANDLE hProcess, _In_ BOOL fForeground) override;
+        [[nodiscard]] NTSTATUS EndTask(_In_ DWORD dwProcessId, _In_ DWORD dwEventType, _In_ ULONG ulCtrlFlags) override;
         [[nodiscard]] NTSTATUS SetWindowOwner(HWND hwnd, DWORD processId, DWORD threadId) noexcept override;
 
         // Public Members