Thread: undefined reference to a function

Hi,

i need to work with images, so I downloaded GDLibrary.
It is in one directory, in another one I have my .c file.

In my .c file I import the library with a sentence like
#include "../thaPath/gd.h"

In my .c I saw that I have no problems using (declaring) types defined in gd.h,
but when I try to use functiones defined there...I got the "undefined reference to..." error message.

I am working under a Red Hat Linux 9 in case the information is worth....

Thanks in advance for any suggestion...