Question

我目前在Windows上安装了cmake，clang和ninja。我正在尝试使用CMake生成一个忍者构建文件来编译一个非常简单的hello world程序。

我的CMakeLists.txt看起来像这样：

cmake_minimum_required(VERSION 2.8)
project(test_project)
add_executable(main main.cpp)

main.cpp是一个简单的hello world程序。

在命令行上运行：cmake -G Ninja ..，我收到以下错误：

-- The C compiler identification is Clang 3.5.0
clang.exe: error: no such file or directory: '/nologo'
clang.exe: error: no such file or directory: '/showIncludes'
-- The CXX compiler identification is Clang 3.5.0
clang.exe: error: no such file or directory: '/nologo'
clang.exe: error: no such file or directory: '/showIncludes'
-- Check for working C compiler using: Ninja
-- Check for working C compiler using: Ninja -- broken
CMake Error at C:/Program Files (x86)/CMake 2.8/share/cmake-2.8/Modules/CMakeTestCCompiler.cmake:61 (message):
  The C compiler "C:/llvm_build/RelWithDebInfo/bin/clang.exe" is
  not able to compile a simple test program.

  It fails with the following output:

   Change Dir: C:/test_proj/build/CMakeFiles/CMakeTmp



  Run Build Command:C:/ninja/ninja.exe cmTryCompileExec375034429

  [1/2] Building C object
  CMakeFiles\cmTryCompileExec375034429.dir\testCCompiler.c.obj


  [2/2] Linking C executable cmTryCompileExec375034429.exe


  FAILED: cmd.exe /c cd .  &&
  C:\llvm_build\RelWithDebInfo\bin\clang.exe
  CMakeFiles\cmTryCompileExec375034429.dir\testCCompiler.c.obj -o
  cmTryCompileExec375034429.exe && cd .


  clang.exe: error: unable to execute command: program not executable



  clang.exe: error: linker command failed with exit code 1 (use -v to see
  invocation)



  ninja: build stopped: subcommand failed.






  CMake will not be able to correctly generate this project.
Call Stack (most recent call first):
  CMakeLists.txt:2 (project)


-- Configuring incomplete, errors occurred!
See also "C:/test_proj/build/CMakeFiles/CMakeOutput.log".
See also "C:/test_proj/build/CMakeFiles/CMakeError.log".

CMakeError.log文件如下所示：

Compiling the C compiler identification source file "CMakeCCompilerId.c" failed.
Compiler: C:/llvm_build/RelWithDebInfo/bin/clang.exe 
Build flags: 
Id flags: 

The output was:
1
clang.exe: error: unable to execute command: program not executable
clang.exe: error: linker command failed with exit code 1 (use -v to see invocation)


Compiling the CXX compiler identification source file "CMakeCXXCompilerId.cpp" failed.
Compiler: C:/llvm_build/RelWithDebInfo/bin/clang++.exe 
Build flags: 
Id flags: 

The output was:
1
clang++.exe: error: unable to execute command: program not executable
clang++.exe: error: linker command failed with exit code 1 (use -v to see invocation)


Determining if the C compiler works failed with the following output:
Change Dir: C:/test_proj/build/CMakeFiles/CMakeTmp

Run Build Command:C:/ninja/ninja.exe cmTryCompileExec2120850158
[1/2] Building C object CMakeFiles\cmTryCompileExec2120850158.dir\testCCompiler.c.obj

[2/2] Linking C executable cmTryCompileExec2120850158.exe

FAILED: cmd.exe /c cd . && C:\llvm_build\RelWithDebInfo\bin\clang.exe     CMakeFiles\cmTryCompileExec2120850158.dir\testCCompiler.c.obj  -o cmTryCompileExec2120850158.exe   && cd .

clang.exe: error: unable to execute command: program not executable


clang.exe: error: linker command failed with exit code 1 (use -v to see invocation)


ninja: build stopped: subcommand failed.

似乎cmake正在尝试使用Windows选项/nologo和/showIncludes来测试clang。我无法弄清楚如何告诉cmake传递正确的参数。

FWIW我正在运行64位Windows 7

修改

所以我查看了内置的cmake文件，发现CMakeClDeps.cmake文件是添加/nologo /showIncludes选项的罪魁祸首。看来如果我将Clang设置为编译器，那么cmake认为visual studio是编译器（它将MSVC_C_ARCHITECTURE_ID设置为x86）。

我删除了设置CMakeDetermineCompilerId.cmake的{{1}}行，再次尝试后，我收到以下错误：

MSVC_C_ARCHITECTURE_ID

Answer 1

不知道它是否有用，但我有同样的错误。现在我可以在Windows上使用clang（3.7.1）/ ninja（1.6）/ cmake（3.4.1）进行编译，在构建目录中执行以下操作：

加载相关的vcvarsXX.bat文件（例如"<Your Visual Studio location>\VC\vcvarsall.bat" x86）
将CC和CXX都设置为clang-cl（而不是clang和clang++）
运行cmake -G Ninja <project>
运行cmake --build .

Answer 2

原来我收到的第二组错误是因为clang找不到链接器。我使用visual studio构建了clang，但当时它无法找到visual studio链接器。我所要做的就是在visual studio开发控制台中运行它。

CMake仍然认为clang是一个visual studio编译器，所以在CMakeDetermineCompilerId.cmake文件中有一行看起来像这样：

set(MSVC_${lang}_ARCHITECTURE_ID "${ARCHITECTURE_ID}")

我改变它看起来像这样

if (COMPILER_ID MATCHES "MSVC")
  set(MSVC_${lang}_ARCHITECTURE_ID "${ARCHITECTURE_ID}")
endif()

希望这不会破坏任何其他CMake功能。

使用CMake，Clang和Ninja在Windows上构建c ++项目

2 个答案: