win32: add missing intrin.h/dbghelp.h headers so tcc can build vc/v_win.c

include/dbghelp.h

@@ -0,0 +1,31 @@
+/**
+ * This file has no copyright assigned and is placed in the Public Domain.
+ * This file is part of the mingw-w64 runtime package.
+ * No warranty is given; refer to the file DISCLAIMER.PD within this package.
+ */
+/*
+ * Unlike include/intrin.h in this same directory (an empty stub with zero
+ * dependencies), this is the real mingw-w64 header, and it is NOT
+ * include-order-independent: its dependency psdk_inc/_dbg_LOAD_IMAGE.h uses
+ * PSTR/PUCHAR/HANDLE/etc. without defining or including them itself - they
+ * must already come from <windows.h>. Including this header before
+ * <windows.h> fails to preprocess. This matches vc/v_win.c's actual order
+ * (<windows.h>, then <intrin.h>, then <dbghelp.h>), which this bundle's
+ * bootstrap depends on and has been verified to build; any other consumer
+ * must include <windows.h> first too.
+ */
+#ifndef _DBGHELP_
+#define _DBGHELP_
+
+#include <_mingw_unicode.h>
+
+#ifdef _WIN64
+#ifndef _IMAGEHLP64
+#define _IMAGEHLP64
+#endif
+#endif
+
+#include <psdk_inc/_dbg_LOAD_IMAGE.h>
+#include <psdk_inc/_dbg_common.h>
+
+#endif

include/intrin.h

@@ -0,0 +1,36 @@
+/*
+ * Minimal compatibility shim for MSVC's <intrin.h>.
+ *
+ * vlang's vc/v_win.c bootstrap snapshot is always generated with `-cc msvc`
+ * (see vlang/v's .github/workflows/gen_vc_ci.yml), which makes its cgen
+ * emit an unconditional `#include <intrin.h>` under `#ifdef _WIN32` (see
+ * vlang/v's vlib/v/gen/c/cleanc.v, the `g.ccompiler == 'msvc'` branch).
+ * This toolchain does not otherwise ship that header, so building
+ * vc/v_win.c directly with the bundled tcc fails before reaching any real
+ * code.
+ *
+ * This is an empty stub, not a ported real intrin.h, because this
+ * toolchain's own include/_mingw.h unconditionally does
+ * `#define __INTRIN_H_` (see its line ~146), which is the real
+ * mingw-w64 intrin.h's own header guard. Since <windows.h> (included
+ * immediately before this header in vc/v_win.c) pulls in _mingw.h first,
+ * a real ported intrin.h's body would already be skipped by its own
+ * guard in that include order - it would silently do nothing, while
+ * still being unable to preprocess standalone, since this bundle does
+ * not ship intrin.h's own dependencies (crtdefs.h,
+ * psdk_inc/intrin-impl.h). An empty stub is the honest version of the
+ * same no-op, without the missing-dependency failure in any other
+ * include order.
+ *
+ * No definitions are needed here regardless: every call site for the
+ * handful of MSVC intrinsics vlang's cgen can emit (_umul128, _udiv128,
+ * _addcarry_u64, _BitScanForward, _BitScanForward64) is wrapped in
+ * `#if defined(_MSC_VER)` at the C level, so under TCC those branches
+ * never compile in the first place - portable fallbacks run instead.
+ * include/winapi/winnt.h (pulled in by <windows.h>) already provides
+ * working `_BitScanForward`, `_BitScanForward64` and `__faststorefence`
+ * for this toolchain (see vlang-header-compat.patch).
+ */
+#ifndef TCC_INTRIN_H_SHIM
+#define TCC_INTRIN_H_SHIM
+#endif

include/poppack.h

@@ -0,0 +1,8 @@
+/**
+ * This file has no copyright assigned and is placed in the Public Domain.
+ * This file is part of the mingw-w64 runtime package.
+ * No warranty is given; refer to the file DISCLAIMER.PD within this package.
+ */
+#if !(defined(lint) || defined(RC_INVOKED))
+#pragma pack(pop)
+#endif

include/psdk_inc/_dbg_LOAD_IMAGE.h

@@ -0,0 +1,52 @@
+/**
+ * This file has no copyright assigned and is placed in the Public Domain.
+ * This file is part of the mingw-w64 runtime package.
+ * No warranty is given; refer to the file DISCLAIMER.PD within this package.
+ */
+#pragma once
+
+#ifndef WINAPI
+#if defined(_ARM_)
+#define WINAPI
+#else
+#define WINAPI __stdcall
+#endif
+#endif
+
+#define IMAGEAPI DECLSPEC_IMPORT WINAPI
+#define DBHLP_DEPRECIATED __declspec(deprecated)
+
+#define DBHLPAPI IMAGEAPI
+
+#define IMAGE_SEPARATION (64*1024)
+
+  typedef struct _LOADED_IMAGE {
+    PSTR ModuleName;
+    HANDLE hFile;
+    PUCHAR MappedAddress;
+#ifdef _IMAGEHLP64
+    PIMAGE_NT_HEADERS64 FileHeader;
+#else
+    PIMAGE_NT_HEADERS32 FileHeader;
+#endif
+    PIMAGE_SECTION_HEADER LastRvaSection;
+    ULONG NumberOfSections;
+    PIMAGE_SECTION_HEADER Sections;
+    ULONG Characteristics;
+    BOOLEAN fSystemImage;
+    BOOLEAN fDOSImage;
+    BOOLEAN fReadOnly;
+    UCHAR Version;
+    LIST_ENTRY Links;
+    ULONG SizeOfImage;
+  } LOADED_IMAGE,*PLOADED_IMAGE;
+
+#define MAX_SYM_NAME 2000
+
+  typedef struct _MODLOAD_DATA {
+    DWORD ssize;
+    DWORD ssig;
+    PVOID data;
+    DWORD size;
+    DWORD flags;
+  } MODLOAD_DATA,*PMODLOAD_DATA;