Geany and SDL

[Iubdou]

I'm using a development environment called Geany that handles multiple languages and since I'm taking a variety of programming courses it seemed appropriate to go for this one, but I can't for the life of me get SDL to play nice with it. I've tried various fixes ranging from reinstalling packages to trying to link it by hand but nothing is working so here's the original error output and the code that generated it. Maybe someone can shed some light on this for me.

//Include SDL functions and datatypes
#include "SDL/SDL.h"
int main( int argc, char* args[] ) {
//The images
SDL_Surface* hello = NULL;
SDL_Surface* screen = NULL;
//Start SDL
SDL_Init( SDL_INIT_EVERYTHING );
//Set up screen
screen = SDL_SetVideoMode( 640, 480, 32, SDL_SWSURFACE );
//Load image
hello = SDL_LoadBMP( "hello.bmp" );
//Apply image to screen
SDL_BlitSurface( hello, NULL, screen, NULL );
//Update Screen
SDL_Flip( screen );
//Pause
SDL_Delay( 2000 );
//Free the loaded image
SDL_FreeSurface( hello );
//Quit SDL
SDL_Quit();
return 0;
}

gcc -Wall -o "BasicSDL" "BasicSDL.c" (in directory: *omitted: irrelevant to error*)
/tmp/ccV8txp6.o: In function `main':
BasicSDL.c:(.text+0x25): undefined reference to `SDL_Init'
BasicSDL.c:(.text+0x3e): undefined reference to `SDL_SetVideoMode'
BasicSDL.c:(.text+0x51): undefined reference to `SDL_RWFromFile'
BasicSDL.c:(.text+0x5e): undefined reference to `SDL_LoadBMP_RW'
BasicSDL.c:(.text+0x7c): undefined reference to `SDL_UpperBlit'
BasicSDL.c:(.text+0x88): undefined reference to `SDL_Flip'
BasicSDL.c:(.text+0x92): undefined reference to `SDL_Delay'
BasicSDL.c:(.text+0x9e): undefined reference to `SDL_FreeSurface'
BasicSDL.c:(.text+0xa3): undefined reference to `SDL_Quit'
collect2: ld returned 1 exit status
Compilation failed.

[dv3500ea]

You need to link your program to SDL using the -lSDL flag.

You need to go to Build -> Set Includes and Arguments in geany and add the -lSDL flag (see attachment).

[slavik]

and please use code tags for the code. :)

[Iubdou]

Well, it compiles fine now, but it doesn't build properly. Yay.

Build outputs the following errors.

g++ -Wall -o "lesson01" "lesson01.cpp" -ISDL (in directory: A place)
/tmp/ccjJz8o4.o: In function `main':
lesson01.cpp:(.text+0x25): undefined reference to `SDL_Init'
lesson01.cpp:(.text+0x3e): undefined reference to `SDL_SetVideoMode'
lesson01.cpp:(.text+0x51): undefined reference to `SDL_RWFromFile'
lesson01.cpp:(.text+0x5e): undefined reference to `SDL_LoadBMP_RW'
lesson01.cpp:(.text+0x7c): undefined reference to `SDL_UpperBlit'
lesson01.cpp:(.text+0x88): undefined reference to `SDL_Flip'
lesson01.cpp:(.text+0x92): undefined reference to `SDL_Delay'
lesson01.cpp:(.text+0x9e): undefined reference to `SDL_FreeSurface'
lesson01.cpp:(.text+0xa3): undefined reference to `SDL_Quit'
collect2: ld returned 1 exit status
Compilation failed.

[Iubdou]

Also, in future I will. Sorry about that, I hardly ever use web forums and despite browsing this one for tips and solutions I haven't gotten the hang of the syntax just yet.

[slavik]

add -lsdl in the build args.

[dv3500ea]

g++ -Wall -o "lesson01" "lesson01.cpp" -ISDL


Use -lSDL not -ISDL.

It is an l, which stands for 'link'.

[slavik]

Use -lSDL not -ISDL.

It is an l, which stands for 'link'.
l = lowercase el ;)

[Iubdou]

And with that it works perfectly. Thank you all very much, now I know there are people I can turn to if I ever have such difficulties again. You'd all get free cookies if I knew where to send them to.