Thanks for the link, BlueHazzard.
I try but for the moment without success.
Here is what I did: (I am under linux)
1) I saw that "libsdl1.2debian" is the SDL lib package installed.
2) I searched where in the computer is the SDL library. I founded this :
/usr/lib/i386-linux-gnu/libSDL-1.2.so.0.11.4 Is it the library I need ? It's not a
.a or
.so or
.lib because of the 0.11.4 !
3) I created an SDL project with codeblocks and put it here :
/home/jp/Documents/Mandelbrot linux/4) then in
Project->Build Options->Search directories->Compiler , I put this :
/home/jp/Documents/Mandelbrot linux/ (correct ?)
5) then in
Project->Build Options->Search directories->Linker, ...
I don't know where is my compiled library !!!So I stopped here for the moment.
Maybe somebody can have an idea or tell me what's wrong

Thanks again for your help. English is not my first language

JP