$ make
/bin/sh ../../libtool --silent --mode=link gcc  -pipe -fno-strict-aliasing -fno-
common -fexceptions -g  -L/usr/X11R6/lib -L/usr/local/lib -pipe -fno-strict-alia
sing -fno-common -fexceptions -g -o fbserv.exe  fbserv.o server.o ../../src/libf
b/libfb.la ../../src/libbu/libbu.la ../../src/libpkg/libpkg.la -L../../src/other
/tcl/unix -ltcl8.5 -ldl -lm  -lgl ../../src/libbu/libbu.la -L../../src/other/tcl
/unix -ltcl8.5 -ldl -lm ../../src/other/libpng/libpng.la -lm -lc -lpthread ../..
/src/libpkg/libpkg.la
../../src/libfb/.libs/libfb.a(libfb_la-if_ogl.o): In function `fb_ogl_open':
/home/IriX64/source/brlcad-7.10.0/src/libfb/if_ogl.c:873: undefined reference to
 `_XOpenDisplay'
/home/IriX64/source/brlcad-7.10.0/src/libfb/if_ogl.c:910: undefined reference to
 `_XCreateColormap'
/home/IriX64/source/brlcad-7.10.0/src/libfb/if_ogl.c:926: undefined reference to
 `_XStoreColors'
/home/IriX64/source/brlcad-7.10.0/src/libfb/if_ogl.c:931: undefined reference to
 `_XCreateColormap'
/home/IriX64/source/brlcad-7.10.0/src/libfb/if_ogl.c:938: undefined reference to