Having trouble dynamically linking X11.c

[Ahi Brown <ahibrown%yahoo.co.uk@localhost>]

Hi.

 I'm having trouble trying to compile a basic example x11.c program from https://rosettacode.org/wiki/Window_creation/X11#Xlib on amd-64 NetBSD 9.0

 I'm using:
gcc rosex.c -I /usr/X11R7/include -L /usr/X11R7/lib -lX11

 when I do

ldd a.out
 -lX11.7 => not found
 -lc.12 => /usr/lib/libc.so.12

when I do
ldd /usr/X11R7/bin/oclock
 -lX11.7 => /usr/X11R7/lib/libX11.so.7

all the oclock X11 libs are linked to /usr/X11R7/lib

 Regards

Ahi