Hi Benny, It seems you forgot to link to gthread : xfprint-main.o(.text+0x30b): In function `main': : undefined reference to `g_thread_init' collect2: ld returned 1 exit status make[2]: *** [xfprint] Error 1 Cheers, -- Olivier Fourdan <fourdan at xfce.org> http://www.xfce.org