[clang] Support --sysroot= for ${arch}-windows-msvc targets (PR #96417)

via cfe-commits cfe-commits at lists.llvm.org
Tue Jun 25 17:42:11 PDT 2024


https://github.com/trcrsired updated https://github.com/llvm/llvm-project/pull/96417

>From 70823f780dc0748446c752f27b52b0f6061bc7e1 Mon Sep 17 00:00:00 2001
From: trcrsired <uwgghhbcad at gmail.com>
Date: Sun, 23 Jun 2024 00:07:19 -0400
Subject: [PATCH 1/2] Support --sysroot= for ${arch}-windows-msvc targets

I think it is possible to use the same rule for msvc targets with
--target= and --sysroot=

See Repository:
https://github.com/trcrsired/windows-msvc-sysroot

Add sysroot support for msvc

MSVC.cpp needs getDriver before using D

add stl in parser for -stdlib=

Add Vcruntime to runtime list and unwind list

MSVC add default runtime lib type and default unwind lib type

add a msvc sysroot test

use %S instead of /foo
---
 clang/include/clang/Driver/ToolChain.h |   9 +-
 clang/lib/Driver/ToolChain.cpp         |   9 +
 clang/lib/Driver/ToolChains/MSVC.cpp   | 248 +++++++++++++++++++------
 clang/lib/Driver/ToolChains/MSVC.h     |  24 ++-
 clang/test/Driver/msvc-sysroot.cpp     |  11 ++
 5 files changed, 232 insertions(+), 69 deletions(-)
 create mode 100644 clang/test/Driver/msvc-sysroot.cpp

diff --git a/clang/include/clang/Driver/ToolChain.h b/clang/include/clang/Driver/ToolChain.h
index 1f93bd612e9b0..04535a98dd69c 100644
--- a/clang/include/clang/Driver/ToolChain.h
+++ b/clang/include/clang/Driver/ToolChain.h
@@ -95,18 +95,21 @@ class ToolChain {
 
   enum CXXStdlibType {
     CST_Libcxx,
-    CST_Libstdcxx
+    CST_Libstdcxx,
+    CST_Stl,
   };
 
   enum RuntimeLibType {
     RLT_CompilerRT,
-    RLT_Libgcc
+    RLT_Libgcc,
+    RLT_Vcruntime
   };
 
   enum UnwindLibType {
     UNW_None,
     UNW_CompilerRT,
-    UNW_Libgcc
+    UNW_Libgcc,
+    UNW_Vcruntime
   };
 
   enum class UnwindTableLevel {
diff --git a/clang/lib/Driver/ToolChain.cpp b/clang/lib/Driver/ToolChain.cpp
index 40ab2e91125d1..b3ed8fc6de36d 100644
--- a/clang/lib/Driver/ToolChain.cpp
+++ b/clang/lib/Driver/ToolChain.cpp
@@ -1091,6 +1091,8 @@ ToolChain::RuntimeLibType ToolChain::GetRuntimeLibType(
     runtimeLibType = ToolChain::RLT_CompilerRT;
   else if (LibName == "libgcc")
     runtimeLibType = ToolChain::RLT_Libgcc;
+  else if (LibName == "vcruntime")
+    runtimeLibType = ToolChain::RLT_Vcruntime;
   else if (LibName == "platform")
     runtimeLibType = GetDefaultRuntimeLibType();
   else {
@@ -1129,6 +1131,8 @@ ToolChain::UnwindLibType ToolChain::GetUnwindLibType(
     unwindLibType = ToolChain::UNW_CompilerRT;
   } else if (LibName == "libgcc")
     unwindLibType = ToolChain::UNW_Libgcc;
+  else if (LibName == "vcruntime")
+    unwindLibType = ToolChain::UNW_Vcruntime;
   else {
     if (A)
       getDriver().Diag(diag::err_drv_invalid_unwindlib_name)
@@ -1152,6 +1156,8 @@ ToolChain::CXXStdlibType ToolChain::GetCXXStdlibType(const ArgList &Args) const{
     cxxStdlibType = ToolChain::CST_Libcxx;
   else if (LibName == "libstdc++")
     cxxStdlibType = ToolChain::CST_Libstdcxx;
+  else if (LibName == "stl")
+    cxxStdlibType = ToolChain::CST_Stl;
   else if (LibName == "platform")
     cxxStdlibType = GetDefaultCXXStdlibType();
   else {
@@ -1290,6 +1296,9 @@ void ToolChain::AddCXXStdlibLibArgs(const ArgList &Args,
   case ToolChain::CST_Libstdcxx:
     CmdArgs.push_back("-lstdc++");
     break;
+
+  default:
+    break;
   }
 }
 
diff --git a/clang/lib/Driver/ToolChains/MSVC.cpp b/clang/lib/Driver/ToolChains/MSVC.cpp
index ca266e3e1d1d3..bf1b6d3b9bc84 100644
--- a/clang/lib/Driver/ToolChains/MSVC.cpp
+++ b/clang/lib/Driver/ToolChains/MSVC.cpp
@@ -31,12 +31,12 @@
 #include <cstdio>
 
 #ifdef _WIN32
-  #define WIN32_LEAN_AND_MEAN
-  #define NOGDI
-  #ifndef NOMINMAX
-    #define NOMINMAX
-  #endif
-  #include <windows.h>
+#define WIN32_LEAN_AND_MEAN
+#define NOGDI
+#ifndef NOMINMAX
+#define NOMINMAX
+#endif
+#include <windows.h>
 #endif
 
 using namespace clang::driver;
@@ -95,43 +95,52 @@ void visualstudio::Linker::ConstructJob(Compilation &C, const JobAction &JA,
   // the environment variable is set however, assume the user knows what
   // they're doing. If the user passes /vctoolsdir or /winsdkdir, trust that
   // over env vars.
-  if (const Arg *A = Args.getLastArg(options::OPT__SLASH_diasdkdir,
-                                     options::OPT__SLASH_winsysroot)) {
-    // cl.exe doesn't find the DIA SDK automatically, so this too requires
-    // explicit flags and doesn't automatically look in "DIA SDK" relative
-    // to the path we found for VCToolChainPath.
-    llvm::SmallString<128> DIAPath(A->getValue());
-    if (A->getOption().getID() == options::OPT__SLASH_winsysroot)
-      llvm::sys::path::append(DIAPath, "DIA SDK");
-
-    // The DIA SDK always uses the legacy vc arch, even in new MSVC versions.
-    llvm::sys::path::append(DIAPath, "lib",
-                            llvm::archToLegacyVCArch(TC.getArch()));
-    CmdArgs.push_back(Args.MakeArgString(Twine("-libpath:") + DIAPath));
-  }
-  if (!llvm::sys::Process::GetEnv("LIB") ||
-      Args.getLastArg(options::OPT__SLASH_vctoolsdir,
-                      options::OPT__SLASH_winsysroot)) {
-    CmdArgs.push_back(Args.MakeArgString(
-        Twine("-libpath:") +
-        TC.getSubDirectoryPath(llvm::SubDirectoryType::Lib)));
-    CmdArgs.push_back(Args.MakeArgString(
-        Twine("-libpath:") +
-        TC.getSubDirectoryPath(llvm::SubDirectoryType::Lib, "atlmfc")));
-  }
-  if (!llvm::sys::Process::GetEnv("LIB") ||
-      Args.getLastArg(options::OPT__SLASH_winsdkdir,
-                      options::OPT__SLASH_winsysroot)) {
-    if (TC.useUniversalCRT()) {
-      std::string UniversalCRTLibPath;
-      if (TC.getUniversalCRTLibraryPath(Args, UniversalCRTLibPath))
+  auto SysRoot = TC.getDriver().SysRoot;
+  if (SysRoot.empty()) {
+    if (const Arg *A = Args.getLastArg(options::OPT__SLASH_diasdkdir,
+                                       options::OPT__SLASH_winsysroot)) {
+      // cl.exe doesn't find the DIA SDK automatically, so this too requires
+      // explicit flags and doesn't automatically look in "DIA SDK" relative
+      // to the path we found for VCToolChainPath.
+      llvm::SmallString<128> DIAPath(A->getValue());
+      if (A->getOption().getID() == options::OPT__SLASH_winsysroot)
+        llvm::sys::path::append(DIAPath, "DIA SDK");
+
+      // The DIA SDK always uses the legacy vc arch, even in new MSVC versions.
+      llvm::sys::path::append(DIAPath, "lib",
+                              llvm::archToLegacyVCArch(TC.getArch()));
+      CmdArgs.push_back(Args.MakeArgString(Twine("-libpath:") + DIAPath));
+    }
+    if (!llvm::sys::Process::GetEnv("LIB") ||
+        Args.getLastArg(options::OPT__SLASH_vctoolsdir,
+                        options::OPT__SLASH_winsysroot)) {
+      CmdArgs.push_back(Args.MakeArgString(
+          Twine("-libpath:") +
+          TC.getSubDirectoryPath(llvm::SubDirectoryType::Lib)));
+      CmdArgs.push_back(Args.MakeArgString(
+          Twine("-libpath:") +
+          TC.getSubDirectoryPath(llvm::SubDirectoryType::Lib, "atlmfc")));
+    }
+    if (!llvm::sys::Process::GetEnv("LIB") ||
+        Args.getLastArg(options::OPT__SLASH_winsdkdir,
+                        options::OPT__SLASH_winsysroot)) {
+      if (TC.useUniversalCRT()) {
+        std::string UniversalCRTLibPath;
+        if (TC.getUniversalCRTLibraryPath(Args, UniversalCRTLibPath))
+          CmdArgs.push_back(
+              Args.MakeArgString(Twine("-libpath:") + UniversalCRTLibPath));
+      }
+      std::string WindowsSdkLibPath;
+      if (TC.getWindowsSDKLibraryPath(Args, WindowsSdkLibPath))
         CmdArgs.push_back(
-            Args.MakeArgString(Twine("-libpath:") + UniversalCRTLibPath));
+            Args.MakeArgString(std::string("-libpath:") + WindowsSdkLibPath));
     }
-    std::string WindowsSdkLibPath;
-    if (TC.getWindowsSDKLibraryPath(Args, WindowsSdkLibPath))
-      CmdArgs.push_back(
-          Args.MakeArgString(std::string("-libpath:") + WindowsSdkLibPath));
+  } else {
+    const std::string MultiarchTriple =
+        TC.getMultiarchTriple(TC.getDriver(), TC.getTriple(), SysRoot);
+    std::string SysRootLib = "-libpath:" + SysRoot + "/lib";
+    CmdArgs.push_back(Args.MakeArgString(SysRootLib + '/' + MultiarchTriple));
+    CmdArgs.push_back(Args.MakeArgString(SysRootLib));
   }
 
   if (!C.getDriver().IsCLMode() && Args.hasArg(options::OPT_L))
@@ -207,13 +216,14 @@ void visualstudio::Linker::ConstructJob(Compilation &C, const JobAction &JA,
         CmdArgs.push_back(TC.getCompilerRTArgString(Args, Lib));
       // Make sure the dynamic runtime thunk is not optimized out at link time
       // to ensure proper SEH handling.
-      CmdArgs.push_back(Args.MakeArgString(
-          TC.getArch() == llvm::Triple::x86
-              ? "-include:___asan_seh_interceptor"
-              : "-include:__asan_seh_interceptor"));
+      CmdArgs.push_back(
+          Args.MakeArgString(TC.getArch() == llvm::Triple::x86
+                                 ? "-include:___asan_seh_interceptor"
+                                 : "-include:__asan_seh_interceptor"));
       // Make sure the linker consider all object files from the dynamic runtime
       // thunk.
-      CmdArgs.push_back(Args.MakeArgString(std::string("-wholearchive:") +
+      CmdArgs.push_back(Args.MakeArgString(
+          std::string("-wholearchive:") +
           TC.getCompilerRT(Args, "asan_dynamic_runtime_thunk")));
     } else if (DLL) {
       CmdArgs.push_back(TC.getCompilerRTArgString(Args, "asan_dll_thunk"));
@@ -224,7 +234,7 @@ void visualstudio::Linker::ConstructJob(Compilation &C, const JobAction &JA,
         // This is necessary because instrumented dlls need access to all the
         // interface exported by the static lib in the main executable.
         CmdArgs.push_back(Args.MakeArgString(std::string("-wholearchive:") +
-            TC.getCompilerRT(Args, Lib)));
+                                             TC.getCompilerRT(Args, Lib)));
       }
     }
   }
@@ -430,6 +440,11 @@ MSVCToolChain::MSVCToolChain(const Driver &D, const llvm::Triple &Triple,
       RocmInstallation(D, Triple, Args) {
   getProgramPaths().push_back(getDriver().Dir);
 
+  auto SysRoot = getDriver().SysRoot;
+  if (!SysRoot.empty()) {
+    return;
+  }
+
   std::optional<llvm::StringRef> VCToolsDir, VCToolsVersion;
   if (Arg *A = Args.getLastArg(options::OPT__SLASH_vctoolsdir))
     VCToolsDir = A->getValue();
@@ -602,8 +617,8 @@ static VersionTuple getMSVCVersionFromExe(const std::string &BinDir) {
   if (!llvm::ConvertUTF8toWide(ClExe.c_str(), ClExeWide))
     return Version;
 
-  const DWORD VersionSize = ::GetFileVersionInfoSizeW(ClExeWide.c_str(),
-                                                      nullptr);
+  const DWORD VersionSize =
+      ::GetFileVersionInfoSizeW(ClExeWide.c_str(), nullptr);
   if (VersionSize == 0)
     return Version;
 
@@ -620,7 +635,7 @@ static VersionTuple getMSVCVersionFromExe(const std::string &BinDir) {
     return Version;
 
   const unsigned Major = (FileInfo->dwFileVersionMS >> 16) & 0xFFFF;
-  const unsigned Minor = (FileInfo->dwFileVersionMS      ) & 0xFFFF;
+  const unsigned Minor = (FileInfo->dwFileVersionMS) & 0xFFFF;
   const unsigned Micro = (FileInfo->dwFileVersionLS >> 16) & 0xFFFF;
 
   Version = VersionTuple(Major, Minor, Micro);
@@ -647,6 +662,17 @@ void MSVCToolChain::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
                                   "include");
   }
 
+  auto SysRoot = getDriver().SysRoot;
+  if (!SysRoot.empty()) {
+    const Driver &D = getDriver();
+    const std::string MultiarchTriple =
+        getMultiarchTriple(D, getTriple(), SysRoot);
+    addSystemInclude(DriverArgs, CC1Args,
+                     SysRoot + "/include/" + MultiarchTriple);
+    addSystemInclude(DriverArgs, CC1Args, SysRoot + "/include");
+    return;
+  }
+
   // Add %INCLUDE%-like directories from the -imsvc flag.
   for (const auto &Path : DriverArgs.getAllArgValues(options::OPT__SLASH_imsvc))
     addSystemInclude(DriverArgs, CC1Args, Path);
@@ -763,12 +789,11 @@ void MSVCToolChain::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
   // As a fallback, select default install paths.
   // FIXME: Don't guess drives and paths like this on Windows.
   const StringRef Paths[] = {
-    "C:/Program Files/Microsoft Visual Studio 10.0/VC/include",
-    "C:/Program Files/Microsoft Visual Studio 9.0/VC/include",
-    "C:/Program Files/Microsoft Visual Studio 9.0/VC/PlatformSDK/Include",
-    "C:/Program Files/Microsoft Visual Studio 8/VC/include",
-    "C:/Program Files/Microsoft Visual Studio 8/VC/PlatformSDK/Include"
-  };
+      "C:/Program Files/Microsoft Visual Studio 10.0/VC/include",
+      "C:/Program Files/Microsoft Visual Studio 9.0/VC/include",
+      "C:/Program Files/Microsoft Visual Studio 9.0/VC/PlatformSDK/Include",
+      "C:/Program Files/Microsoft Visual Studio 8/VC/include",
+      "C:/Program Files/Microsoft Visual Studio 8/VC/PlatformSDK/Include"};
   addSystemIncludes(DriverArgs, CC1Args, Paths);
 #endif
 }
@@ -776,6 +801,24 @@ void MSVCToolChain::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
 void MSVCToolChain::AddClangCXXStdlibIncludeArgs(const ArgList &DriverArgs,
                                                  ArgStringList &CC1Args) const {
   // FIXME: There should probably be logic here to find libc++ on Windows.
+  if (DriverArgs.hasArg(options::OPT_nostdinc, options::OPT_nostdlibinc,
+                        options::OPT_nostdincxx))
+    return;
+  if (getDriver().SysRoot.empty())
+    return;
+  switch (GetCXXStdlibType(DriverArgs)) {
+  case ToolChain::CST_Stl:
+    addStlIncludePaths(DriverArgs, CC1Args);
+    break;
+  case ToolChain::CST_Libstdcxx:
+    addLibStdCXXIncludePaths(DriverArgs, CC1Args);
+    break;
+  case ToolChain::CST_Libcxx:
+    addLibCxxIncludePaths(DriverArgs, CC1Args);
+    break;
+  default:
+    break;
+  }
 }
 
 VersionTuple MSVCToolChain::computeMSVCVersion(const Driver *D,
@@ -877,7 +920,8 @@ static void TranslateOptArg(Arg *A, llvm::opt::DerivedArgList &DAL,
           DAL.AddFlagArg(A, Opts.getOption(options::OPT_fno_inline));
           break;
         case '1':
-          DAL.AddFlagArg(A, Opts.getOption(options::OPT_finline_hint_functions));
+          DAL.AddFlagArg(A,
+                         Opts.getOption(options::OPT_finline_hint_functions));
           break;
         case '2':
         case '3':
@@ -912,11 +956,10 @@ static void TranslateOptArg(Arg *A, llvm::opt::DerivedArgList &DAL,
       }
       if (SupportsForcingFramePointer) {
         if (OmitFramePointer)
-          DAL.AddFlagArg(A,
-                         Opts.getOption(options::OPT_fomit_frame_pointer));
+          DAL.AddFlagArg(A, Opts.getOption(options::OPT_fomit_frame_pointer));
         else
-          DAL.AddFlagArg(
-              A, Opts.getOption(options::OPT_fno_omit_frame_pointer));
+          DAL.AddFlagArg(A,
+                         Opts.getOption(options::OPT_fno_omit_frame_pointer));
       } else {
         // Don't warn about /Oy- in x86-64 builds (where
         // SupportsForcingFramePointer is false).  The flag having no effect
@@ -1027,3 +1070,86 @@ void MSVCToolChain::addClangTargetOptions(
   if (Arg *A = DriverArgs.getLastArgNoClaim(options::OPT_marm64x))
     A->ignoreTargetSpecific();
 }
+
+void MSVCToolChain::addStlIncludePaths(
+    const llvm::opt::ArgList &DriverArgs,
+    llvm::opt::ArgStringList &CC1Args) const {
+  const Driver &D = getDriver();
+  std::string SysRoot = computeSysRoot();
+  std::string LibPath = SysRoot + "/include";
+  const std::string MultiarchTriple =
+      getMultiarchTriple(D, getTriple(), SysRoot);
+
+  std::string TargetDir = LibPath + "/" + MultiarchTriple + "/c++/stl";
+  addSystemInclude(DriverArgs, CC1Args, TargetDir);
+
+  // Second add the generic one.
+  addSystemInclude(DriverArgs, CC1Args, LibPath + "/c++/stl");
+}
+
+void MSVCToolChain::addLibCxxIncludePaths(
+    const llvm::opt::ArgList &DriverArgs,
+    llvm::opt::ArgStringList &CC1Args) const {
+  const Driver &D = getDriver();
+  std::string SysRoot = computeSysRoot();
+  std::string LibPath = SysRoot + "/include";
+  const std::string MultiarchTriple =
+      getMultiarchTriple(D, getTriple(), SysRoot);
+
+  std::string Version = detectLibcxxVersion(LibPath);
+  if (Version.empty())
+    return;
+
+  std::string TargetDir = LibPath + "/" + MultiarchTriple + "/c++/" + Version;
+  addSystemInclude(DriverArgs, CC1Args, TargetDir);
+
+  // Second add the generic one.
+  addSystemInclude(DriverArgs, CC1Args, LibPath + "/c++/" + Version);
+}
+
+void MSVCToolChain::addLibStdCXXIncludePaths(
+    const llvm::opt::ArgList &DriverArgs,
+    llvm::opt::ArgStringList &CC1Args) const {
+  // We cannot use GCCInstallationDetector here as the sysroot usually does
+  // not contain a full GCC installation.
+  // Instead, we search the given sysroot for /usr/include/xx, similar
+  // to how we do it for libc++.
+  const Driver &D = getDriver();
+  std::string SysRoot = computeSysRoot();
+  std::string LibPath = SysRoot + "/include";
+  const std::string MultiarchTriple =
+      getMultiarchTriple(D, getTriple(), SysRoot);
+
+  // This is similar to detectLibcxxVersion()
+  std::string Version;
+  {
+    std::error_code EC;
+    Generic_GCC::GCCVersion MaxVersion =
+        Generic_GCC::GCCVersion::Parse("0.0.0");
+    SmallString<128> Path(LibPath);
+    llvm::sys::path::append(Path, "c++");
+    for (llvm::vfs::directory_iterator LI = getVFS().dir_begin(Path, EC), LE;
+         !EC && LI != LE; LI = LI.increment(EC)) {
+      StringRef VersionText = llvm::sys::path::filename(LI->path());
+      if (VersionText[0] != 'v') {
+        auto Version = Generic_GCC::GCCVersion::Parse(VersionText);
+        if (Version > MaxVersion)
+          MaxVersion = Version;
+      }
+    }
+    if (MaxVersion.Major > 0)
+      Version = MaxVersion.Text;
+  }
+
+  if (Version.empty())
+    return;
+
+  std::string TargetDir = LibPath + "/c++/" + Version + "/" + MultiarchTriple;
+  addSystemInclude(DriverArgs, CC1Args, TargetDir);
+
+  // Second add the generic one.
+  addSystemInclude(DriverArgs, CC1Args, LibPath + "/c++/" + Version);
+  // Third the backward one.
+  addSystemInclude(DriverArgs, CC1Args,
+                   LibPath + "/c++/" + Version + "/backward");
+}
diff --git a/clang/lib/Driver/ToolChains/MSVC.h b/clang/lib/Driver/ToolChains/MSVC.h
index 3950a8ed38e8b..609ce1c738751 100644
--- a/clang/lib/Driver/ToolChains/MSVC.h
+++ b/clang/lib/Driver/ToolChains/MSVC.h
@@ -71,9 +71,7 @@ class LLVM_LIBRARY_VISIBILITY MSVCToolChain : public ToolChain {
     return llvm::DebuggerKind::Default;
   }
 
-  unsigned GetDefaultDwarfVersion() const override {
-    return 4;
-  }
+  unsigned GetDefaultDwarfVersion() const override { return 4; }
 
   std::string getSubDirectoryPath(llvm::SubDirectoryType Type,
                                   llvm::StringRef SubdirParent = "") const;
@@ -100,8 +98,8 @@ class LLVM_LIBRARY_VISIBILITY MSVCToolChain : public ToolChain {
   void AddHIPRuntimeLibArgs(const llvm::opt::ArgList &Args,
                             llvm::opt::ArgStringList &CmdArgs) const override;
 
-  bool getWindowsSDKLibraryPath(
-      const llvm::opt::ArgList &Args, std::string &path) const;
+  bool getWindowsSDKLibraryPath(const llvm::opt::ArgList &Args,
+                                std::string &path) const;
   bool getUniversalCRTLibraryPath(const llvm::opt::ArgList &Args,
                                   std::string &path) const;
   bool useUniversalCRT() const;
@@ -132,7 +130,23 @@ class LLVM_LIBRARY_VISIBILITY MSVCToolChain : public ToolChain {
 
   Tool *buildLinker() const override;
   Tool *buildAssembler() const override;
+
 private:
+  CXXStdlibType GetDefaultCXXStdlibType() const override {
+    return ToolChain::CST_Stl;
+  }
+  RuntimeLibType GetDefaultRuntimeLibType() const override {
+    return ToolChain::RLT_Vcruntime;
+  }
+  UnwindLibType GetDefaultUnwindLibType() const override {
+    return ToolChain::UNW_Vcruntime;
+  }
+  void addStlIncludePaths(const llvm::opt::ArgList &DriverArgs,
+                          llvm::opt::ArgStringList &CC1Args) const;
+  void addLibCxxIncludePaths(const llvm::opt::ArgList &DriverArgs,
+                             llvm::opt::ArgStringList &CC1Args) const;
+  void addLibStdCXXIncludePaths(const llvm::opt::ArgList &DriverArgs,
+                                llvm::opt::ArgStringList &CC1Args) const;
   std::optional<llvm::StringRef> WinSdkDir, WinSdkVersion, WinSysRoot;
   std::string VCToolChainPath;
   llvm::ToolsetLayout VSLayout = llvm::ToolsetLayout::OlderVS;
diff --git a/clang/test/Driver/msvc-sysroot.cpp b/clang/test/Driver/msvc-sysroot.cpp
new file mode 100644
index 0000000000000..9e58729ec57e9
--- /dev/null
+++ b/clang/test/Driver/msvc-sysroot.cpp
@@ -0,0 +1,11 @@
+// RUN: %clangxx --target=x86_64-unknown-windows-msvc -### --sysroot=%S -fuse-ld=lld %s 2>&1 | FileCheck --check-prefix=COMPILE %s
+// COMPILE: clang{{.*}}" "-cc1"
+// COMPILE: "-isysroot" "[[SYSROOT:[^"]+]]"
+// COMPILE: "-internal-isystem" "[[SYSROOT:[^"]+]]/include/x86_64-unknown-windows-msvc/c++/stl"
+// COMPILE: "-internal-isystem" "[[SYSROOT:[^"]+]]/include/c++/stl"
+
+// RUN: %clangxx --target=aarch64-unknown-windows-msvc -### --sysroot=%S -fuse-ld=lld %s 2>&1 | FileCheck --check-prefix=COMPILE %s
+// COMPILE: clang{{.*}}" "-cc1"
+// COMPILE: "-isysroot" "[[SYSROOT:[^"]+]]"
+// COMPILE: "-internal-isystem" "[[SYSROOT:[^"]+]]/include/aarch64-unknown-windows-msvc/c++/stl"
+// COMPILE: "-internal-isystem" "[[SYSROOT:[^"]+]]/include/c++/stl"

>From 24e29a756c3955b74df235f07a978839c4982633 Mon Sep 17 00:00:00 2001
From: trcrsired <uwgghhbcad at gmail.com>
Date: Tue, 25 Jun 2024 20:39:51 -0400
Subject: [PATCH 2/2] Fix test for msvc-sysroot

Also add a pesudo implementation for WebAssembly and
maybe Microsoft STL could be ported to more targets in the future
---
 clang/lib/Driver/ToolChains/WebAssembly.cpp | 27 ++++++
 clang/lib/Driver/ToolChains/WebAssembly.h   |  2 +
 clang/test/Driver/msvc-sysroot.cpp          | 92 ++++++++++++++++++---
 clang/test/Driver/wasm-toolchain.cpp        | 12 +++
 4 files changed, 122 insertions(+), 11 deletions(-)

diff --git a/clang/lib/Driver/ToolChains/WebAssembly.cpp b/clang/lib/Driver/ToolChains/WebAssembly.cpp
index 60bd97e0ee987..d90985eaa01a2 100644
--- a/clang/lib/Driver/ToolChains/WebAssembly.cpp
+++ b/clang/lib/Driver/ToolChains/WebAssembly.cpp
@@ -518,6 +518,11 @@ void WebAssembly::AddClangCXXStdlibIncludeArgs(const ArgList &DriverArgs,
   case ToolChain::CST_Libstdcxx:
     addLibStdCXXIncludePaths(DriverArgs, CC1Args);
     break;
+  case ToolChain::CST_Stl:
+    addStlIncludePaths(DriverArgs, CC1Args);
+    break;
+  default:
+    break;
   }
 }
 
@@ -534,6 +539,8 @@ void WebAssembly::AddCXXStdlibLibArgs(const llvm::opt::ArgList &Args,
   case ToolChain::CST_Libstdcxx:
     CmdArgs.push_back("-lstdc++");
     break;
+  default:
+    break;
   }
 }
 
@@ -552,6 +559,26 @@ Tool *WebAssembly::buildLinker() const {
   return new tools::wasm::Linker(*this);
 }
 
+void WebAssembly::addStlIncludePaths(
+    const llvm::opt::ArgList &DriverArgs,
+    llvm::opt::ArgStringList &CC1Args) const {
+  const Driver &D = getDriver();
+  std::string SysRoot = computeSysRoot();
+  std::string LibPath = SysRoot + "/include";
+  const std::string MultiarchTriple =
+      getMultiarchTriple(D, getTriple(), SysRoot);
+  bool IsKnownOs = (getTriple().getOS() != llvm::Triple::UnknownOS);
+
+  // First add the per-target include path if the OS is known.
+  if (IsKnownOs) {
+    std::string TargetDir = LibPath + "/" + MultiarchTriple + "/c++/stl";
+    addSystemInclude(DriverArgs, CC1Args, TargetDir);
+  }
+
+  // Second add the generic one.
+  addSystemInclude(DriverArgs, CC1Args, LibPath + "/c++/stl");
+}
+
 void WebAssembly::addLibCxxIncludePaths(
     const llvm::opt::ArgList &DriverArgs,
     llvm::opt::ArgStringList &CC1Args) const {
diff --git a/clang/lib/Driver/ToolChains/WebAssembly.h b/clang/lib/Driver/ToolChains/WebAssembly.h
index 76e0ca39bd748..7470b5ed9db0f 100644
--- a/clang/lib/Driver/ToolChains/WebAssembly.h
+++ b/clang/lib/Driver/ToolChains/WebAssembly.h
@@ -79,6 +79,8 @@ class LLVM_LIBRARY_VISIBILITY WebAssembly final : public ToolChain {
                                  const llvm::Triple &TargetTriple,
                                  StringRef SysRoot) const override;
 
+  void addStlIncludePaths(const llvm::opt::ArgList &DriverArgs,
+                             llvm::opt::ArgStringList &CC1Args) const;
   void addLibCxxIncludePaths(const llvm::opt::ArgList &DriverArgs,
                              llvm::opt::ArgStringList &CC1Args) const;
   void addLibStdCXXIncludePaths(const llvm::opt::ArgList &DriverArgs,
diff --git a/clang/test/Driver/msvc-sysroot.cpp b/clang/test/Driver/msvc-sysroot.cpp
index 9e58729ec57e9..983e530f09955 100644
--- a/clang/test/Driver/msvc-sysroot.cpp
+++ b/clang/test/Driver/msvc-sysroot.cpp
@@ -1,11 +1,81 @@
-// RUN: %clangxx --target=x86_64-unknown-windows-msvc -### --sysroot=%S -fuse-ld=lld %s 2>&1 | FileCheck --check-prefix=COMPILE %s
-// COMPILE: clang{{.*}}" "-cc1"
-// COMPILE: "-isysroot" "[[SYSROOT:[^"]+]]"
-// COMPILE: "-internal-isystem" "[[SYSROOT:[^"]+]]/include/x86_64-unknown-windows-msvc/c++/stl"
-// COMPILE: "-internal-isystem" "[[SYSROOT:[^"]+]]/include/c++/stl"
-
-// RUN: %clangxx --target=aarch64-unknown-windows-msvc -### --sysroot=%S -fuse-ld=lld %s 2>&1 | FileCheck --check-prefix=COMPILE %s
-// COMPILE: clang{{.*}}" "-cc1"
-// COMPILE: "-isysroot" "[[SYSROOT:[^"]+]]"
-// COMPILE: "-internal-isystem" "[[SYSROOT:[^"]+]]/include/aarch64-unknown-windows-msvc/c++/stl"
-// COMPILE: "-internal-isystem" "[[SYSROOT:[^"]+]]/include/c++/stl"
+// RUN: %clangxx --target=x86_64-unknown-windows-msvc -### \
+// RUN: --sysroot=%S -fuse-ld=lld %s 2>&1 \
+// RUN: | FileCheck --check-prefix=COMPILE_X86_64_STL %s
+// COMPILE_X86_64_STL: clang{{.*}}" "-cc1"
+// COMPILE_X86_64_STL: "-isysroot" "[[SYSROOT:[^"]+]]"
+// COMPILE_X86_64_STL: "-internal-isystem" "[[SYSROOT:[^"]+]]/include/x86_64-unknown-windows-msvc/c++/stl"
+// COMPILE_X86_64_STL: "-internal-isystem" "[[SYSROOT:[^"]+]]/include/c++/stl"
+// COMPILE_X86_64_STL: lld-link{{.*}}" "-libpath:[[SYSROOT:[^"]+]]/lib/x86_64-unknown-windows-msvc" "-libpath:[[SYSROOT:[^"]+]]/lib"
+
+// RUN: %clangxx --target=x86_64-unknown-windows-msvc -### \
+// RUN: --sysroot=%S/Inputs/basic_linux_libcxx_tree/usr -stdlib=libc++ -fuse-ld=lld %s 2>&1 \
+// RUN: | FileCheck --check-prefix=COMPILE_X86_64_LIBCXX %s
+// COMPILE_X86_64_LIBCXX: clang{{.*}}" "-cc1"
+// COMPILE_X86_64_LIBCXX: "-isysroot" "[[SYSROOT:[^"]+]]"
+// COMPILE_X86_64_LIBCXX: "-internal-isystem" "[[SYSROOT:[^"]+]]/include/x86_64-unknown-windows-msvc/c++/v1"
+// COMPILE_X86_64_LIBCXX: "-internal-isystem" "[[SYSROOT:[^"]+]]/include/c++/v1"
+// COMPILE_X86_64_LIBCXX: lld-link{{.*}}" "-libpath:[[SYSROOT:[^"]+]]/lib/x86_64-unknown-windows-msvc" "-libpath:[[SYSROOT:[^"]+]]/lib"
+
+// RUN: %clangxx -### --target=x86_64-unknown-windows-msvc --stdlib=libstdc++ %s 2>&1 \
+// RUN:  -fuse-ld=lld  --sysroot=%S/Inputs/basic_linux_libstdcxx_libcxxv2_tree/usr \
+// RUN:   | FileCheck -check-prefix=COMPILE_X86_64_LIBSTDCXX %s
+// COMPILE_X86_64_LIBSTDCXX: "-cc1"
+// COMPILE_X86_64_LIBSTDCXX: "-resource-dir" "[[RESOURCE_DIR:[^"]*]]"
+// COMPILE_X86_64_LIBSTDCXX: "-isysroot" "[[SYSROOT:[^"]+]]"
+// COMPILE_X86_64_LIBSTDCXX: "-internal-isystem" "[[SYSROOT:[^"]+]]/include/c++/4.8/x86_64-unknown-windows-msvc"
+// COMPILE_X86_64_LIBSTDCXX: "-internal-isystem" "[[SYSROOT:[^"]+]]/include/c++/4.8"
+// COMPILE_X86_64_LIBSTDCXX: "-internal-isystem" "[[SYSROOT:[^"]+]]/include/c++/4.8/backward"
+// COMPILE_X86_64_LIBSTDCXX: "-internal-isystem" "[[RESOURCE_DIR]]{{(/|\\\\)}}include"
+// COMPILE_X86_64_LIBSTDCXX: "-internal-isystem" "[[SYSROOT:[^"]+]]/include/x86_64-unknown-windows-msvc"
+// COMPILE_X86_64_LIBSTDCXX: "-internal-isystem" "[[SYSROOT:[^"]+]]/include"
+// COMPILE_X86_64_LIBSTDCXX: lld-link{{.*}}" "-libpath:[[SYSROOT:[^"]+]]/lib/x86_64-unknown-windows-msvc" "-libpath:[[SYSROOT:[^"]+]]/lib"
+
+// RUN: %clangxx --target=aarch64-unknown-windows-msvc -### \
+// RUN: --sysroot=%S -fuse-ld=lld %s 2>&1 \
+// RUN: | FileCheck --check-prefix=COMPILE_AARCH64_STL %s
+// COMPILE_AARCH64_STL: clang{{.*}}" "-cc1"
+// COMPILE_AARCH64_STL: "-isysroot" "[[SYSROOT:[^"]+]]"
+// COMPILE_AARCH64_STL: "-internal-isystem" "[[SYSROOT:[^"]+]]/include/aarch64-unknown-windows-msvc/c++/stl"
+// COMPILE_AARCH64_STL: "-internal-isystem" "[[SYSROOT:[^"]+]]/include/c++/stl"
+// COMPILE_AARCH64_STL: lld-link{{.*}}" "-libpath:[[SYSROOT:[^"]+]]/lib/aarch64-unknown-windows-msvc" "-libpath:[[SYSROOT:[^"]+]]/lib"
+
+// RUN: %clangxx --target=loongarch64-unknown-windows-msvc -stdlib=stl -### \
+// RUN: --sysroot=%S -fuse-ld=lld %s 2>&1 \
+// RUN: | FileCheck --check-prefix=COMPILE_LOONGARCH64_STL %s
+// COMPILE_LOONGARCH64_STL: clang{{.*}}" "-cc1"
+// COMPILE_LOONGARCH64_STL: "-isysroot" "[[SYSROOT:[^"]+]]"
+// COMPILE_LOONGARCH64_STL: "-internal-isystem" "[[SYSROOT:[^"]+]]/include/loongarch64-unknown-windows-msvc/c++/stl"
+// COMPILE_LOONGARCH64_STL: "-internal-isystem" "[[SYSROOT:[^"]+]]/include/c++/stl"
+// COMPILE_LOONGARCH64_STL: lld-link{{.*}}" "-libpath:[[SYSROOT:[^"]+]]/lib/loongarch64-unknown-windows-msvc" "-libpath:[[SYSROOT:[^"]+]]/lib"
+
+// RUN: %clangxx --target=x86_64-unknown-windows-msvc -stdlib=stl -### \
+// RUN: --sysroot=%S %s 2>&1 \
+// RUN: | FileCheck --check-prefix=COMPILE_X86_64_STL_LINK %s
+// COMPILE_X86_64_STL_LINK: clang{{.*}}" "-cc1"
+// COMPILE_X86_64_STL_LINK: "-isysroot" "[[SYSROOT:[^"]+]]"
+// COMPILE_X86_64_STL_LINK: "-internal-isystem" "[[SYSROOT:[^"]+]]/include/x86_64-unknown-windows-msvc/c++/stl"
+// COMPILE_X86_64_STL_LINK: "-internal-isystem" "[[SYSROOT:[^"]+]]/include/c++/stl"
+// COMPILE_X86_64_STL_LINK: link.exe{{.*}}" "-libpath:[[SYSROOT:[^"]+]]/lib/x86_64-unknown-windows-msvc" "-libpath:[[SYSROOT:[^"]+]]/lib"
+
+// RUN: %clangxx --target=loongarch64-unknown-windows-msvc -stdlib=libc++ -### \
+// RUN: --sysroot=%S/Inputs/basic_linux_libcxx_tree/usr %s 2>&1 \
+// RUN: | FileCheck --check-prefix=COMPILE_LOONGARCH64_STL_LINK %s
+// COMPILE_LOONGARCH64_STL_LINK: clang{{.*}}" "-cc1"
+// COMPILE_LOONGARCH64_STL_LINK: "-isysroot" "[[SYSROOT:[^"]+]]"
+// COMPILE_LOONGARCH64_STL_LINK: "-internal-isystem" "[[SYSROOT:[^"]+]]/include/loongarch64-unknown-windows-msvc/c++/v1"
+// COMPILE_LOONGARCH64_STL_LINK: "-internal-isystem" "[[SYSROOT:[^"]+]]/include/c++/v1"
+// COMPILE_LOONGARCH64_STL_LINK: link.exe{{.*}}" "-libpath:[[SYSROOT:[^"]+]]/lib/loongarch64-unknown-windows-msvc" "-libpath:[[SYSROOT:[^"]+]]/lib"
+
+// RUN: %clangxx --target=riscv64-unknown-windows-msvc -### --stdlib=libstdc++ %s 2>&1 \
+// RUN:  --sysroot=%S/Inputs/basic_linux_libstdcxx_libcxxv2_tree/usr \
+// RUN:   | FileCheck -check-prefix=COMPILE_RISCV64_LIBSTDCXX_LINK %s
+// COMPILE_RISCV64_LIBSTDCXX_LINK: "-cc1"
+// COMPILE_RISCV64_LIBSTDCXX_LINK: "-resource-dir" "[[RESOURCE_DIR:[^"]*]]"
+// COMPILE_RISCV64_LIBSTDCXX_LINK: "-isysroot" "[[SYSROOT:[^"]+]]"
+// COMPILE_RISCV64_LIBSTDCXX_LINK: "-internal-isystem" "[[SYSROOT:[^"]+]]/include/c++/4.8/riscv64-unknown-windows-msvc"
+// COMPILE_RISCV64_LIBSTDCXX_LINK: "-internal-isystem" "[[SYSROOT:[^"]+]]/include/c++/4.8"
+// COMPILE_RISCV64_LIBSTDCXX_LINK: "-internal-isystem" "[[SYSROOT:[^"]+]]/include/c++/4.8/backward"
+// COMPILE_RISCV64_LIBSTDCXX_LINK: "-internal-isystem" "[[RESOURCE_DIR]]{{(/|\\\\)}}include"
+// COMPILE_RISCV64_LIBSTDCXX_LINK: "-internal-isystem" "[[SYSROOT:[^"]+]]/include/riscv64-unknown-windows-msvc"
+// COMPILE_RISCV64_LIBSTDCXX_LINK: "-internal-isystem" "[[SYSROOT:[^"]+]]/include"
+// COMPILE_RISCV64_LIBSTDCXX_LINK: link.exe{{.*}}" "-libpath:[[SYSROOT:[^"]+]]/lib/riscv64-unknown-windows-msvc" "-libpath:[[SYSROOT:[^"]+]]/lib"
diff --git a/clang/test/Driver/wasm-toolchain.cpp b/clang/test/Driver/wasm-toolchain.cpp
index ba1c55b33edca..203e3d0d99a3e 100644
--- a/clang/test/Driver/wasm-toolchain.cpp
+++ b/clang/test/Driver/wasm-toolchain.cpp
@@ -86,3 +86,15 @@
 // COMPILE_STDCXX: "-internal-isystem" "[[RESOURCE_DIR]]{{(/|\\\\)}}include"
 // COMPILE_STDCXX: "-internal-isystem" "[[SYSROOT:[^"]+]]/include/wasm32-wasi"
 // COMPILE_STDCXX: "-internal-isystem" "[[SYSROOT:[^"]+]]/include"
+
+// RUN: %clangxx -### --target=wasm32-wasi --stdlib=stl %s 2>&1 \
+// RUN:     --sysroot=%S \
+// RUN:   | FileCheck -check-prefix=COMPILE_STL %s
+// COMPILE_STL: "-cc1"
+// COMPILE_STL: "-resource-dir" "[[RESOURCE_DIR:[^"]*]]"
+// COMPILE_STL: "-isysroot" "[[SYSROOT:[^"]+]]"
+// COMPILE_STL: "-internal-isystem" "[[SYSROOT:[^"]+]]/include/wasm32-wasi/c++/stl"
+// COMPILE_STL: "-internal-isystem" "[[SYSROOT:[^"]+]]/include/c++/stl"
+// COMPILE_STL: "-internal-isystem" "[[RESOURCE_DIR]]{{(/|\\\\)}}include"
+// COMPILE_STL: "-internal-isystem" "[[SYSROOT:[^"]+]]/include/wasm32-wasi"
+// COMPILE_STL: "-internal-isystem" "[[SYSROOT:[^"]+]]/include"
\ No newline at end of file



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