[SOLVED] Linking sdl2 (undefined reference to SDL functions) in chicken scheme

Linking sdl2 (undefined reference to SDL functions) in chicken scheme

I am trying to learn chicken scheme by writing a simple game using sdl. I am trying to create a foreign function to initialize SDL:

(use foreigners lolevel)

(foreign-declare "#include <SDL2/SDL.h>")

(define (sdl-init)
  (foreign-lambda* int ((int val))
    "if (SDL_Init(SDL_INIT_VIDEO) < 0) {
    SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, \"Couldn't initialize SDL: %s\",
                 SDL_GetError());
    exit(1);
  }
  "))

I get the errors:

undefined reference to `SDL_Init'
undefined reference to `SDL_GetError'
undefined reference to `SDL_LogError'

So it can't find SDL. Normally in C you would do something like this (from the sdl page):

gcc -o test test.c sdl-config --cflags --libs

is there a way to add these flags when compiling .scm files.

Solution

I would recommend using the sdl2 egg. If you still prefer to build your own bindings to sdl2, you can use something like this:

csc test.scm -C "`sdl-config --cflags`" -L "`sdl-config --libs`"

Also I note that you're still on CHICKEN 4, which is no longer maintained; you might want to consider updating to CHICKEN 5.