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 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 Fix the toggle of wasm that prevents -stdlib=stl passed into Avoid clang-formatting in MSVC.cpp Add some comments to ToolChain avoid indent the if block Add back space before winsysroot line use instead of arch in the comment remove FIXME for libc++ since we have added the logic here Remove MSVC.h formatting Remove default cases in WebAssembly add back the empty line before the Sysroot line fix msvc-sysroot typo for libc++ loongarch
llvm · Jul 1, 2024 · 0bea332 · 0bea332
1 parent 95038a5
commit 0bea332
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Showing 8 changed files with 279 additions and 5 deletions.
diff --git a/clang/include/clang/Driver/ToolChain.h b/clang/include/clang/Driver/ToolChain.h
@@ -94,19 +94,22 @@ class ToolChain {
   using path_list = SmallVector<std::string, 16>;
 
   enum CXXStdlibType {
-    CST_Libcxx,
-    CST_Libstdcxx
+    CST_Libcxx, // LLVM libc++
+    CST_Libstdcxx,  // GNU libstdc++
+    CST_Stl,  // MSVC 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
@@ -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 +1296,10 @@ void ToolChain::AddCXXStdlibLibArgs(const ArgList &Args,
   case ToolChain::CST_Libstdcxx:
     CmdArgs.push_back("-lstdc++");
     break;
+
+  case ToolChain:CST_Stl:
+    // MSVC STL does not need to add -l
+    break;
   }
 }
 

diff --git a/clang/lib/Driver/ToolChains/MSVC.cpp b/clang/lib/Driver/ToolChains/MSVC.cpp
@@ -90,6 +90,16 @@ void visualstudio::Linker::ConstructJob(Compilation &C, const JobAction &JA,
     CmdArgs.push_back("-defaultlib:oldnames");
   }
 
+  auto SysRoot = TC.getDriver().SysRoot;
+  if (!SysRoot.empty()) {
+    // If we have --sysroot, then we ignore all other setings
+    // libpath is $SYSROOT/lib and $SYSROOT/lib/${ARCH}-unknown-windows-msvc
+    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));
+  } else {
   // If the VC environment hasn't been configured (perhaps because the user
   // did not run vcvarsall), try to build a consistent link environment.  If
   // the environment variable is set however, assume the user knows what
@@ -133,6 +143,7 @@ void visualstudio::Linker::ConstructJob(Compilation &C, const JobAction &JA,
       CmdArgs.push_back(
           Args.MakeArgString(std::string("-libpath:") + WindowsSdkLibPath));
   }
+  }
 
   if (!C.getDriver().IsCLMode() && Args.hasArg(options::OPT_L))
     for (const auto &LibPath : Args.getAllArgValues(options::OPT_L))
@@ -430,6 +441,12 @@ 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()) {
+    // We have sysroot so we ignore all VCTools settings
+    return;
+  }
+
   std::optional<llvm::StringRef> VCToolsDir, VCToolsVersion;
   if (Arg *A = Args.getLastArg(options::OPT__SLASH_vctoolsdir))
     VCToolsDir = A->getValue();
@@ -647,6 +664,17 @@ 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);
@@ -775,7 +803,22 @@ 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;
+  }
 }
 
 VersionTuple MSVCToolChain::computeMSVCVersion(const Driver *D,
@@ -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
@@ -133,6 +133,21 @@ 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/lib/Driver/ToolChains/WebAssembly.cpp b/clang/lib/Driver/ToolChains/WebAssembly.cpp
@@ -460,6 +460,8 @@ WebAssembly::GetCXXStdlibType(const ArgList &Args) const {
       return ToolChain::CST_Libcxx;
     else if (Value == "libstdc++")
       return ToolChain::CST_Libstdcxx;
+    else if (Value == "stl")
+      return ToolChain::CST_Stl;
     else
       getDriver().Diag(diag::err_drv_invalid_stdlib_name)
           << A->getAsString(Args);
@@ -518,6 +520,9 @@ void WebAssembly::AddClangCXXStdlibIncludeArgs(const ArgList &DriverArgs,
   case ToolChain::CST_Libstdcxx:
     addLibStdCXXIncludePaths(DriverArgs, CC1Args);
     break;
+  case ToolChain::CST_Stl:
+    addStlIncludePaths(DriverArgs, CC1Args);
+    break;
   }
 }
 
@@ -552,6 +557,26 @@ 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
@@ -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
@@ -0,0 +1,81 @@
+// 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_LIBCXX_LINK %s
+// COMPILE_LOONGARCH64_LIBCXX_LINK: clang{{.*}}" "-cc1"
+// COMPILE_LOONGARCH64_LIBCXX_LINK: "-isysroot" "[[SYSROOT:[^"]+]]"
+// COMPILE_LOONGARCH64_LIBCXX_LINK: "-internal-isystem" "[[SYSROOT:[^"]+]]/include/loongarch64-unknown-windows-msvc/c++/v1"
+// COMPILE_LOONGARCH64_LIBCXX_LINK: "-internal-isystem" "[[SYSROOT:[^"]+]]/include/c++/v1"
+// COMPILE_LOONGARCH64_LIBCXX_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"