installation problem in SunOS

[Sanghyo Kim <shkim2@comet.columbia.edu>]

Please help with this error message.
Thanks.

checking for -ldl... (cached) no
checking for sys/ioctl.h... (cached) yes
checking for sys/filio.h... (cached) yes
checking FIONBIO vs. O_NONBLOCK for nonblocking I/O... O_NONBLOCK
creating ./config.status
creating Makefile
creating tclConfig.sh
cc -c -O    -I./../generic -I.  -DHAVE_GETCWD=1 -DNO_DIRENT_H=1
-DNO_VALUES_H=1
-DNO_STDLIB_H=1 -DNO_STRING_H=1 -DHAVE_UNISTD_H=1 -DNO_FD_SET=1
-DHAVE_SYS_TIME_H=1
-DTIME_WITH_SYS_TIME=1 -DHAVE_TM_ZONE=1 -DHAVE_ST_BLKSIZE=1
-Dstrtod=fixstrtod
-DSTDC_HEADERS=1 -DNO_UNION_WAIT=1 -DRETSIGTYPE=void -Dvfork=fork
-DGETTOD_NOT_DECLARED=1 -DHAVE_SYS_IOCTL_H=1 -DHAVE_SYS_FILIO_H=1       
-DTCL_SHLIB_EXT=\".so\"
-DTCL_LIBRARY=\"/home/kinshuk/ns/ns-allinone-2.1b6/tclbox/lib/tcl8.0\" \

-DTCL_PACKAGE_PATH="\"/home/kinshuk/ns/ns-allinone-2.1b6/tclbox/lib\"" \
        ./tclUnixInit.c
/usr/ucb/cc:  language optional software package not installed
*** Error code 1
tcl8.0.4 make failed! Exiting ...
For problems with Tcl/Tk see http://www.scriptics.com