如何正確設置CMakeLists.txt文件？

Question

我有一個簡單的C++測試項目，並寫下我的CMakeLists.txt文件如下;

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) 

當我嘗試運行CMake的GUI的一套發生器MinGW的我收到以下錯誤信息：

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位和我確認了CMD是什麼; G ++ --version給出G ++（GCC）4.6.1。

我在做什麼錯？

Answer 1

很抱歉，這看起來像編譯器沒有安裝在您指定的位置。另請參閱here爲什麼你應該避免設置編譯器的CMakeLists.txt

所以我刪除這些，清除緩存的CMake，CMake的調用之前設置環境變量CC和CXX，然後再試一次。

Answer 2

我認爲你的問題在於路徑字符串。試試這個：

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

或者，你也可以在CMake GUI中設置你的編譯器。點擊生成後，選擇「指定本地編譯器」選項並設置或瀏覽到正確的位置。