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SDL Error Help

Started by Luffi45 Nov 3, 2012 at 4:22 AM 0 replies 1.3k views

Original Post

Nov 3, 2012 at 4:22 AM

I have been trying to get started with SDL, I have set up my code and can't seem to find out what's wrong.
Here is my source code:
#include
#include
#include
int main( int argc, char* args[] )
{
//The images
SDL_Surface* hello = NULL;
SDL_Surface* screen = NULL;
SDL_Init(SDL_INIT_VIDEO);
screen = SDL_SetVideoMode(640,480,16, SDL_HWSURFACE|SDL_DOUBLEBUF);
hello= SDL_LoadBMP("riku.bmp");
SDL_BlitSurface(hello,NULL,screen,NULL);
SDL_Flip(screen);
SDL_Delay(2000);
SDL_FreeSurface(hello);
SDL_Quit();
return 0;
}
The errors I get are:
\mingw\lib\libSDLmain.a(SDL_win32_main.o):SDL_win32_main.c|| undefined reference to

SDL_strlcpy'|
 \mingw\lib\libSDLmain.a(SDL_win32_main.o):SDL_win32_main.c|| undefined reference to

SDL_strlcat'|
\mingw\lib\libSDLmain.a(SDL_win32_main.o):SDL_win32_main.c|| undefined reference to

SDL_strlcpy'|
 \mingw\lib\libSDLmain.a(SDL_win32_main.o):SDL_win32_main.c|| undefined reference to

SDL_strlcat'|
\mingw\lib\libSDLmain.a(SDL_win32_main.o):SDL_win32_main.c|| undefined reference to

SDL_strlcpy'|
 \mingw\lib\libSDLmain.a(SDL_win32_main.o):SDL_win32_main.c|| undefined reference to

SDL_GetError'|
\mingw\lib\libSDLmain.a(SDL_win32_main.o):SDL_win32_main.c|| undefined reference to

SDL_SetModuleHandle'|
 \mingw\lib\libSDLmain.a(SDL_win32_main.o):SDL_win32_main.c|| undefined reference to

SDL_getenv'|
\mingw\lib\libSDLmain.a(SDL_win32_main.o):SDL_win32_main.c|| undefined reference to `SDL_strlcpy'|
||=== Build finished: 9 errors, 0 warnings ===|

I don't know what is wrong with the code, could someone please help me?
I am using the latest versions of SDL and mingw, I have mingw32, SDL, and SDLmain libraries linked, and I am using the code::blocks IDE.

Luffi45

Nov 3, 2012 at 1:28 PM

I have fixed my problem, my compiler settings were incorrect. Now, I have anoher problem.
Here is my code:
#include
#include
const int SCREEN_WIDTH = 640;
const int SCREEN_HEIGHT = 480;
const int SCREEN_BPP = 32;
SDL_Surface *message = NULL;
SDL_Surface *background = NULL;
SDL_Surface *screen = NULL;
SDL_Surface *load_image( std::string filename){
//Temporary storage for the image that's loaded
SDL_Surface* loadedImage = NULL;
//The optimized image that will be used
SDL_Surface* optimizedImage = NULL;
//Load the image
loadedImage = SDL_LoadBMP( filename.c_str() );
//If nothing went wrong in loading the image
if( loadedImage != NULL )
{
//Create an optimized image
optimizedImage = SDL_DisplayFormat( loadedImage );
//Free the old image
SDL_FreeSurface( loadedImage );
}
//Return the optimized image
return optimizedImage;
}
void apply_surface( int x, int y, SDL_Surface* source, SDL_Surface* destination )
{
//Make a temporary rectangle to hold the offsets
SDL_Rect offset;
//Give the offsets to the rectangle
offset.x = x;
offset.y = y;
SDL_BlitSurface( source, NULL, destination, &offset );
}
int main( int argc, char* args[] )
{
if( SDL_Init( SDL_INIT_EVERYTHING ) == -1 )
{
return 1;
}
screen = SDL_SetVideoMode( SCREEN_WIDTH, SCREEN_HEIGHT, SCREEN_BPP, SDL_SWSURFACE );
//If there was an error in setting up the screen
if( screen == NULL )
{
return 1;
}
SDL_WM_SetCaption( "Riku!", NULL );
message = load_image( "riku.bmp" );
background = load_image( "abc.bmp" );
//Apply the background to the screen
apply_surface( 0, 0, background, screen );
apply_surface( 320, 0, background, screen );
apply_surface( 0, 240, background, screen );
apply_surface( 320, 240, background, screen );
apply_surface( 180, 140, message, screen );
if( SDL_Flip( screen ) == -1 )
{
return 1;
}
SDL_Delay( 2000 );
}
With this code, rather than applying 5 images to the screen, it simply places one of the riku.bmp images in the top corner.
Can someone please help me with this?

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