c++pragma

How to pass no argument into pragma comment in c++

I want my program to show the console window if it detects the solution configuration is debug. If it detects release, then the console window should not show up

#include "Window.h"

int main(int argc, char* argv[]) {
    Window Game;

#if defined(_DEBUG)
#pragma comment(linker, "/SUBSYSTEM:console /ENTRY:")
    Game.run();
#else
#pragma comment(linker, "/SUBSYSTEM:windows /ENTRY:mainCRTStartup")
    Game.run();
#endif
}

The source code above doesn't work because:

LNK1146 no argument specified with option '/ENTRY:'

So I want to know how to pass no argument in #pragma comment (or just improve this source code in general)

(using Visual Studio 2023 and C++ 20)

Any help is appreciated!

Solution

  • The /ENTRY flag for MSVC always has to be followed by :function_name. So if you want to keep the default, just don't pass /ENTRY at all for that case:

    #include "Window.h"

int main(int argc, char* argv[]) {
    Window Game;

#if defined(_DEBUG)
#pragma comment(linker, "/SUBSYSTEM:console")
    Game.run();
#else
#pragma comment(linker, "/SUBSYSTEM:windows /ENTRY:mainCRTStartup")
    Game.run();
#endif
}