Sorry for the bad written code. It was late. The linux src was modified a bit. (renamed cpp to c) Please use this source if you wanna compile the project on another x86 platform! I compiled it with: gcc -o asm_compo11 main.c graphics.c -lpthread `sdl-config --cflags --libs` If that doenst work, use this instead: gcc -o asm_compo11 main.c graphics.c -lSDL over and out - saida