make[2]: Leaving directory `/home/IriX64/brlcad-7.8.4/src/conv'
Making all in fbserv
make[2]: Entering directory `/home/IriX64/brlcad-7.8.4/src/fbserv'
/bin/sh ../../libtool --silent --tag=CC --mode=link gcc  -pipe -fno-strict-alias
ing -fno-common -g  -L/usr/X11R6/lib -L/usr/local/lib -pipe -fno-strict-aliasing
 -fno-common -g -o fbserv.exe  fbserv.o server.o ../../src/libfb/libfb.la
/usr/bin/ld: cannot find -lGL2
collect2: ld returned 1 exit status
make[2]: *** [fbserv.exe] Error 1
make[2]: Leaving directory `/home/IriX64/brlcad-7.8.4/src/fbserv'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/home/IriX64/brlcad-7.8.4/src'
make: *** [all-recursive] Error 1

IriX64@FthrNtr ~/brlcad-7.8.4
$ cd src/fbserv