I am trying to compile a simple X application but I keep getting the folloeing error: gcc -g -o testapp test1.c -lX11 /usr/bin/ld: cannot find -lX11 collect2: ld returned 1 exit status Any suggestions? What are the Xlib libraries called under Linux. Thanks. -D __________________________________________________ Do You Yahoo!? Get Yahoo! Mail ? Free email you can access from anywhere! http://mail.yahoo.com/