sdl_main or WinMain@16 error

[Michael Sgier]

Hi
While trying to compile the follwoing example with devC++ I get errors:

D:\SDL-1.2.7MingW\lib\libSDLmain.a(SDL_win32_main.o.b)(.t ext+0x34b)
[Warning] In function `console_main':
[Linker error] undefined reference to `SDL_SetModuleHandle'
[Linker error] undefined reference to `SDL_main'
If I delete the link to SDL_main I get undefinded reference to
WinMain@16
Thanks for help. Regards
Michael
PS: The links to sdl etc. should be fine tough.

/* Example of OpenGL rendering through SDL. */

#include <SDL/SDL.h>
#include <GL/gl.h>
#include <stdio.h>
#include <stdlib.h>

int main()
{

/* Initialize SDL as usual. */
if (SDL_Init(SDL_INIT_VIDEO) != 0) {
printf("Error: %s\n", SDL_GetError());
return 1;
}

atexit(SDL_Quit);

/* Enable OpenGL double buffering. */
SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);

/* Set the color depth (16-bit 565). */
SDL_GL_SetAttribute(SDL_GL_RED_SIZE, 5);
SDL_GL_SetAttribute(SDL_GL_GREEN_SIZE, 6);
SDL_GL_SetAttribute(SDL_GL_BLUE_SIZE, 5);

/* Create a 640x480, 16 bit window with support for
OpenGL rendering. Unfortunately we won't know
whether this is hardware accelerated. */
if (SDL_SetVideoMode(640, 480, 16, SDL_OPENGL) == NULL) {
printf("Error: %s\n", SDL_GetError());
return 1;
}

/* Set a window title. */
SDL_WM_SetCaption("OpenGL with SDL!", "OpenGL");

/* We can now use any OpenGL rendering commands. */
glViewport(80, 0, 480, 480);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glFrustum(-1.0, 1.0, -1.0, 1.0, 1.0, 100.0);
glClearColor(0, 0, 0, 0);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glClear(GL_COLOR_BUFFER_BIT);
glBegin(GL_TRIANGLES);
glColor3f(1.0, 0, 0);
glVertex3f(0.0, 1.0, -2.0);
glColor3f(0, 1.0, 0);
glVertex3f(1.0, -1.0, -2.0);
glColor3f(0, 0, 1.0);
glVertex3f(-1.0, -1.0, -2.0);
glEnd();
glFlush();

/* Display the back buffer to the screen. */
SDL_GL_SwapBuffers();

/* Wait a few seconds. */
SDL_Delay(5000);

return 0;
}

[Arttu Valo]

Michael Sgier wrote:

Hi
While trying to compile the follwoing example with devC++ I get errors:

D:\SDL-1.2.7MingW\lib\libSDLmain.a(SDL_win32_main.o.b)(.t ext+0x34b)
[Warning] In function `console_main':
[Linker error] undefined reference to `SDL_SetModuleHandle'
[Linker error] undefined reference to `SDL_main'
If I delete the link to SDL_main I get undefinded reference to
WinMain@16
Thanks for help. Regards
Michael
PS: The links to sdl etc. should be fine tough.

/* Example of OpenGL rendering through SDL. */

#include <SDL/SDL.h>
#include <GL/gl.h>
#include <stdio.h>
#include <stdlib.h>

int main()
{

/* Initialize SDL as usual. */
if (SDL_Init(SDL_INIT_VIDEO) != 0) {
printf("Error: %s\n", SDL_GetError());
return 1;
}

atexit(SDL_Quit);

/* Enable OpenGL double buffering. */
SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);

/* Set the color depth (16-bit 565). */
SDL_GL_SetAttribute(SDL_GL_RED_SIZE, 5);
SDL_GL_SetAttribute(SDL_GL_GREEN_SIZE, 6);
SDL_GL_SetAttribute(SDL_GL_BLUE_SIZE, 5);

/* Create a 640x480, 16 bit window with support for
OpenGL rendering. Unfortunately we won't know
whether this is hardware accelerated. */
if (SDL_SetVideoMode(640, 480, 16, SDL_OPENGL) == NULL) {
printf("Error: %s\n", SDL_GetError());
return 1;
}

/* Set a window title. */
SDL_WM_SetCaption("OpenGL with SDL!", "OpenGL");

/* We can now use any OpenGL rendering commands. */
glViewport(80, 0, 480, 480);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glFrustum(-1.0, 1.0, -1.0, 1.0, 1.0, 100.0);
glClearColor(0, 0, 0, 0);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glClear(GL_COLOR_BUFFER_BIT);
glBegin(GL_TRIANGLES);
glColor3f(1.0, 0, 0);
glVertex3f(0.0, 1.0, -2.0);
glColor3f(0, 1.0, 0);
glVertex3f(1.0, -1.0, -2.0);
glColor3f(0, 0, 1.0);
glVertex3f(-1.0, -1.0, -2.0);
glEnd();
glFlush();

/* Display the back buffer to the screen. */
SDL_GL_SwapBuffers();

/* Wait a few seconds. */
SDL_Delay(5000);

return 0;
}

Try changing int main() to int main( int argc, char **argv )