checking whether char is unsigned..configure:error: can not run

["KJ CURRAN" <kj.curran@ulst.ac.uk>]

I downloaded ns-allinone-2.1b5a ok and extracted all the files on a 
Solaris Sparc 2.4 machine. I then type ./install and I get as far as 
the following. I've tried setting commands such as 'setenc cc gcc' but 
to no avail. Any clues?


loading cache ./config.cache
checking for ranlib... :
checking whether cross-compiling... yes
checking for getcwd... no
checking for opendir... no
checking for strstr... no
checking for strtol... no
checking for tmpnam... no
checking for waitpid... no
checking for strerror... no
checking for getwd... no
checking for wait3... no
checking for uname... no
checking for sin... no
checking for -lieee... no
checking dirent.h... no
checking how to run the C preprocessor... cc -E
checking for errno.h... yes
checking for float.h... yes
checking for values.h... yes
checking for limits.h... yes
checking for stdlib.h... yes
checking for string.h... yes
checking for sys/wait.h... yes
checking for dlfcn.h... yes
checking for unistd.h... yes
checking termios vs. termio vs. sgtty... none
checking fd_set and sys/select... no
checking for sys/time.h... yes
checking whether time.h and sys/time.h may both be included... no
checking whether struct tm is in sys/time.h or time.h... sys/time.h
checking for tm_zone in struct tm... no checking for tzname... no
checking tm_tzadj in struct tm... no checking tm_gmtoff in struct
tm... no checking long timezone variable... no checking time_t
timezone variable... no checking for st_blksize in struct stat... no
checking proper strstr implementation... broken, using substitute
checking for strtoul... no checking for strtod... no checking for
strtod... (cached) no checking for ANSI C header files... no checking
for mode_t... no checking for pid_t... no checking for size_t... no
checking for uid_t in sys/types.h... no checking for opendir...
(cached) no checking union wait... no checking matherr support... no
checking return type of signal handlers... int checking for vfork...
no checking for strncasecmp... no checking for -lsocket... no checking
for -linet... no checking for BSDgettimeofday... no checking for
gettimeofday... no checking for gettimeofday declaration... missing
checking for -linet... no checking for net/errno.h... yes checking
whether char is unsigned...
 tcl8.0.4 configuration failed! Exiting ...