Clang+llvm在windows下面怎么配置运行

下了官网的clang+llvm-3.1-i386-mingw32-EXPERIMENTAL.tar.bz2，解压后将bin添加到环境变量path中。采用标准mingw32（http://www.mingw.org/）或tdm mingw32(http://tdm-gcc.tdragon.net/)的，只要将其安装到C:\mingw（或在win7下用mklink将C:\mingw指向安装目录），并将C:\mingw\bin添加到环境变量path中就万事大吉了。

若追求新版本而采用下面两种版本MinGW32的

i686-pc-mingw32 从 http://code.google.com/p/mingw-builds/下载

或i686-w64-mingw32从 http://sourceforge.net/projects/mingwbuilds/files/ 下载

就算按上面的方法设置好环境变量path，仍然会得到下面的错误而无法使用

clang test.c

test.c:2:11: fatal error: 'stdio.h' file not found

# include

          ^

1 error generated.

 

这是因为clang默认的 MinGW32 头文件搜索路径如下：

Clang works on some mingw32 distributions. Clang assumes directories as below;

       C:/mingw/include

       C:/mingw/lib

       C:/mingw/lib/gcc/mingw32/4.[3-5].0/include/c++

为了使Clang适应 i686-pc-mingw32 和 i686-w64-mingw32的目录设置。需要修改llvm-src-path\tool\clang\lib\\Frontend\InitHeaderSearch.cpp并重新编译。

改动如下红色部分：

…

  /// AddMinGWCPlusPlusIncludePaths - Add the necessary paths to support a MinGW

  ///  libstdc++.

  void AddMinGWCPlusPlusIncludePaths(StringRef Base,

                                     StringRef Arch,

                                     StringRef Version);

 void AddMinGWCPlusPlusIncludePaths2(StringRef Base,

                                    StringRef Arch,

                                    StringRef Version);

…

void InitHeaderSearch::AddMinGWCPlusPlusIncludePaths2(StringRef Base,

                                                    StringRef Arch,

                                                    StringRef Version) {

 AddPath(Base + "/include/c++/" + Version,

         CXXSystem, true, false, false);

 AddPath(Base + "/include/c++/" + Version +  "/" + Arch,

         CXXSystem, true, false, false);

 AddPath(Base + "/include/c++/backward/" + Version,

         CXXSystem, true, false, false);

}

…

void InitHeaderSearch::AddDefaultCIncludePaths(const llvm::Triple &triple,

                                            const HeaderSearchOptions &HSOpts) {

…

      AddPath("c:/mingw/include", System, true, false, false);

      //i686-pc-mingw32

      AddPath("c:/mingw/i686-pc-mingw32/include", System, true, false, false);

      //i686-w64-mingw32

      AddPath("c:/mingw/i686-w64-mingw32/include", System, true, false, false);

…

void InitHeaderSearch::

AddDefaultCPlusPlusIncludePaths(const llvm::Triple &triple, const HeaderSearchOptions &HSOpts) {

…

  case llvm::Triple::MinGW32:

    // mingw-w64 C++ include paths (i686-w64-mingw32 and x86_64-w64-mingw32)

    AddMinGW64CXXPaths(HSOpts.ResourceDir, "4.5.0");

    AddMinGW64CXXPaths(HSOpts.ResourceDir, "4.5.1");

    AddMinGW64CXXPaths(HSOpts.ResourceDir, "4.5.2");

    AddMinGW64CXXPaths(HSOpts.ResourceDir, "4.5.3");

    AddMinGW64CXXPaths(HSOpts.ResourceDir, "4.5.4");

    AddMinGW64CXXPaths(HSOpts.ResourceDir, "4.6.0");

    AddMinGW64CXXPaths(HSOpts.ResourceDir, "4.6.1");

    AddMinGW64CXXPaths(HSOpts.ResourceDir, "4.6.2");

    AddMinGW64CXXPaths(HSOpts.ResourceDir, "4.6.3");

    AddMinGW64CXXPaths(HSOpts.ResourceDir, "4.7.0");

    // mingw.org C++ include paths

    AddMinGWCPlusPlusIncludePaths("/mingw/lib/gcc", "mingw32", "4.5.2"); //MSYS

   AddMinGWCPlusPlusIncludePaths("c:/MinGW/lib/gcc", "mingw32", "4.7.2");

   AddMinGWCPlusPlusIncludePaths("c:/MinGW/lib/gcc", "mingw32", "4.7.1");

   AddMinGWCPlusPlusIncludePaths("c:/MinGW/lib/gcc", "mingw32", "4.7.0");

   AddMinGWCPlusPlusIncludePaths("c:/MinGW/lib/gcc", "mingw32", "4.6.3");

    AddMinGWCPlusPlusIncludePaths("c:/MinGW/lib/gcc", "mingw32", "4.6.2");

    AddMinGWCPlusPlusIncludePaths("c:/MinGW/lib/gcc", "mingw32", "4.6.1");

    AddMinGWCPlusPlusIncludePaths("c:/MinGW/lib/gcc", "mingw32", "4.5.2");

    AddMinGWCPlusPlusIncludePaths("c:/MinGW/lib/gcc", "mingw32", "4.5.0");

    AddMinGWCPlusPlusIncludePaths("c:/MinGW/lib/gcc", "mingw32", "4.4.0");

    AddMinGWCPlusPlusIncludePaths("c:/MinGW/lib/gcc", "mingw32", "4.3.0");

   //i686-pc-mingw32

   AddMinGWCPlusPlusIncludePaths2("c:/mingw", "i686-pc-mingw32", "4.7.2");

   AddMinGWCPlusPlusIncludePaths2("c:/mingw", "i686-pc-mingw32", "4.7.1");

   AddMinGWCPlusPlusIncludePaths2("c:/mingw", "i686-pc-mingw32", "4.7.0");

   AddMinGWCPlusPlusIncludePaths2("c:/mingw", "i686-pc-mingw32", "4.6.3");

   AddMinGWCPlusPlusIncludePaths2("c:/mingw", "i686-pc-mingw32", "4.6.2");

   AddMinGWCPlusPlusIncludePaths2("c:/mingw", "i686-pc-mingw32", "4.6.1");

   AddMinGWCPlusPlusIncludePaths2("c:/mingw", "i686-pc-mingw32", "4.5.2");

   AddMinGWCPlusPlusIncludePaths2("c:/mingw", "i686-pc-mingw32", "4.5.0");

   //i686-w64-mingw32

   AddMinGWCPlusPlusIncludePaths("c:/MinGW/lib/gcc", "i686-w64-mingw32", "4.7.2");

   AddMinGWCPlusPlusIncludePaths("c:/MinGW/lib/gcc", "i686-w64-mingw32", "4.7.1");

   AddMinGWCPlusPlusIncludePaths("c:/MinGW/lib/gcc", "i686-w64-mingw32", "4.7.0");

   AddMinGWCPlusPlusIncludePaths("c:/MinGW/lib/gcc", "i686-w64-mingw32", "4.6.3");

   AddMinGWCPlusPlusIncludePaths("c:/MinGW/lib/gcc", "i686-w64-mingw32", "4.6.2");

   AddMinGWCPlusPlusIncludePaths("c:/MinGW/lib/gcc", "i686-w64-mingw32", "4.6.1");

   AddMinGWCPlusPlusIncludePaths("c:/MinGW/lib/gcc", "i686-w64-mingw32", "4.5.2");

   AddMinGWCPlusPlusIncludePaths("c:/MinGW/lib/gcc", "i686-w64-mingw32", "4.5.0");

break;

…

在过了约1小时的编译，新的llvm+clang 3.1浴火重生了！