MinGW isn't outputting executable or object file - c

Question

I've just started using MinGW and I'm having an issue where it isn't outputting an executable or an object file, or anything really. After fixing a few errors everything compiles fine, but no executable is being outputted. When I first installed MinGW I tested it on a simple hello world program and everything worked correctly, but I'm trying to write a basic windows application and it's not working. I've worked with gcc before, but only briefly, I don't really know anything about it.
C:\Users\Cole\Dev\Hello Windows\>gcc win_main.c -o win_main
Here's the win_main.c file:
#include <windows.h>
#include <stdio.h>
/*
* Global Variables
*/
HWND g_hwnd = NULL;
HINSTANCE g_hinst = NULL;
/*
* Forward Declarations
*/
LRESULT CALLBACK win_proc(HWND h_wnd, UINT message, WPARAM w_param, LPARAM l_param);
HRESULT init_window(HINSTANCE h_instance, int cmd_show);
/*
* Main entry point to the application.
*/
int WINAPI WinMain(HINSTANCE h_instance, HINSTANCE h_previnstance, LPSTR cmd_line, int cmd_show) {
if(FAILED(init_window(h_instance, cmd_show)))
return -1;
MSG msg = {0};
while(GetMessage(&msg, NULL, 0, 0)) {
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return (int)msg.wParam;
}
/*
* Register window class and create the window.
*/
HRESULT init_window(HINSTANCE h_instance, int cmd_show) {
/* Register window class. */
WNDCLASSEX wcx;
wcx.cbSize = sizeof(WNDCLASSEX);
wcx.style = CS_VREDRAW | CS_HREDRAW;
wcx.lpfnWndProc = win_proc;
wcx.cbClsExtra = 0;
wcx.cbWndExtra = 0;
wcx.hInstance = h_instance;
wcx.hIcon = NULL;
wcx.hIconSm = NULL;
wcx.hCursor = LoadCursor(NULL, IDC_ARROW);
wcx.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
wcx.lpszMenuName = NULL;
wcx.lpszClassName = "BasicWindowClass";
if(!RegisterClassEx(&wcx)) {
printf("Failed to register window class.\n");
return E_FAIL;
}
/* Create the window. */
g_hinst = h_instance;
RECT rc = {0, 0, 640, 480};
AdjustWindowRect(&rc, WS_OVERLAPPEDWINDOW, FALSE);
g_hwnd = CreateWindow("BasicWindowClass", "Windows Application", WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT,
rc.right - rc.left, rc.bottom - rc.top, NULL, NULL, g_hinst, NULL);
if(g_hwnd == NULL) {
printf("Failed to create the window.\n");
return E_FAIL;
}
ShowWindow(g_hwnd, cmd_show);
return S_OK;
}
LRESULT CALLBACK win_proc(HWND h_wnd, UINT message, WPARAM w_param, LPARAM l_param) {
PAINTSTRUCT ps;
HDC hdc;
switch(message) {
case WM_PAINT:
hdc = BeginPaint(h_wnd, &ps);
EndPaint(h_wnd, &ps);
break;
case WM_DESTROY:
PostQuitMessage(0);
break;
default:
return DefWindowProc(h_wnd, message, w_param, l_param);
}
return 0;
}

Answer 1

You should add -mwindows gcc -mwindows win_main.c -o win_main .I guess your first program was using a 'main' function as entry point...