如何使用 system() 函数 (MSVC) 编译 C++ 代码？

Question

i am trying to compile a c++ file with system() function using c++.

void CodeGenerator::GenerateExe(ProgramNode* parsed_tree, std::string folder_path, std::string file_name)
{
    std::string cpp_name = folder_path + file_name + ".cpp";

    GenerateCppFile(parsed_tree, cpp_name);
    std::string command;
    command += "cl ";
    command += cpp_name + " /OUT ";
    command += folder_path;

    system(command.c_str());
}

I know I can do that in developer cmd, but the system() function opens regular cmd, so it cannot recognize the "cl" command.

Please tell how to open developer cmd or how to setup the environtment to compile the code via c++.

Answer 1

You can do this by adding the path of cl to the environment variables:

This can be done like so:

• Open a run window, you can do this by typing run in search.
• type sysdm.cpl
• Choose Advanced separator
• Click environment variables
• In system variables select path and click edit
• Click new and add the path of your cl command. In my case the cl.exe file is in

C:\\Program Files (x86)\\Microsoft Visual Studio\\2019\\Community\\VC\\Tools\\MSVC\\14.24.28314\\bin\\Hostx64\\x64

It doesn't vary all that much but you must use the correct path in your machine.

• After this you must open a new cmd window for the changes can be detected and run the cl command from any place in your machine.