CMake Error：check_source_compiles: CXX: needs to be enabled before use.已解决

沐风_ZTL2024-01-30 14:59

在windows中使用安装的msys2-x86_64-20240113.exe下的C:/msys64/mingw64/bin/中的g++.exe和gcc.exe出现标题中报错

经搜索有类似错误：

bash 复制代码

CMake Error at /usr/share/cmake/Modules/Internal/CheckFlagCommonConfig.cmake:58 (message):
  check_compiler_flag: C: needs to be enabled before use.

有提示解决办法：

You should either check if C is enabled in the CMakeLists.txt here before using check_c_compiler_flag , of just enable C with project("bitpit" C CXX) at the top of the file.

也即在根CMakeLists.txt文件中的project中的工程名后添加C、CXX，分别对应C、C++编译器

如project(Test)修改为project(Test C CXX)

且应添加各指定编译器设置：

复制代码

set(CMAKE_AR  C:/msys64/mingw64/bin/ar.exe)
set(CMAKE_C_COMPILER  C:/msys64/mingw64/bin/gcc.exe)
set(CMAKE_CXX_COMPILER  C:/msys64/mingw64/bin/g++.exe)