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c++sdlinit

why I'm getting an error when on SDL_Init?

when my code is:

int WinMain(int argc, char **argv) {

    int SDL_Init(SDL_INIT_VIDEO);
    return 0;
}

it's working fine but when my code is:

int WinMain(int argc, char **argv) {

    if(SDL_Init(SDL_INIT_VIDEO) < 0) {
        // nothing here
    }
    return 0;
}

I'm getting this error: undefined reference to 'SDL_Init'

I'm on VSC 1.32.1 window 10 mingw32 6.3.0

Solution

  • In your first code you delcare an int called SDL_Init, lets change the names to make it more obvious:

    int WinMain(int argc, char **argv) {
    int variable_name(some_value);    
}

    In your second code you call a function:

    int WinMain(int argc, char **argv) {
    if(some_function(some_value) < 0) { }
}

    Thats why in the first you dont get an error, but in the second you do. Seems like there is no some_function aka SDL_Init defined, which can be caused by not linking corretly, see here for how to fix that.