c++ - 如何正确设置 CMakeLists.txt 文件？

Question

我有一个简单的C++测试项目，我的CMakeLists.txt文件写成如下；

 cmake_minimum_required(VERSION 2.8)

 set(CMAKE_C_COMPILER "C:/MinGW/bin/gcc")
 set(CMAKE_CXX_COMPILER "C:/MinGW/bin/g++")

 project(simpleTest)
 add_executable(main main.cpp)

当我尝试运行 CMake GUI 并将生成器设置为 MinGW 时，我收到以下错误消息:

The C compiler identification is GNU 4.6.1
The CXX compiler identification is GNU 4.6.1
Check for working C compiler: C:/MinGW/bin/gcc
CMake Error: your C compiler: "C:/MinGW/bin/gcc" was not found.   Please set CMAKE_C_COMPILER to a valid compiler path or name.
CMake Error: Internal CMake error, TryCompile configure of cmake failed
Check for working C compiler: C:/MinGW/bin/gcc -- broken
CMake Error at C:/Program Files (x86)/CMake 2.8/share/cmake-2.8/Modules/CMakeTestCCompiler.cmake:61 (message):
  The C compiler "C:/MinGW/bin/gcc" is not able to compile a simple test
  program.

  It fails with the following output:



  CMake will not be able to correctly generate this project.
Call Stack (most recent call first):
  CMakeLists.txt:7 (project)


CMake Error: your C compiler: "C:/MinGW/bin/gcc" was not found.   Please set CMAKE_C_COMPILER to a valid compiler path or name.
CMake Error: your CXX compiler: "C:/MinGW/bin/g++" was not found.   Please set CMAKE_CXX_COMPILER to a valid compiler path or name.
Configuring incomplete, errors occurred!

我在 Windows 7 64 位上，我在 cmd 上确认了这一点； G++ --version 给出 G++ (GCC) 4.6.1。

我做错了什么？

Answer 1

抱歉，编译器似乎没有安装在您指定的位置。另见 here为什么你应该避免在 CMakeLists.txt 中设置编译器

所以我会删除它们，清除 cmake 缓存，在调用 CMake 之前设置环境变量 CC 和 CXX，然后重试。