🚀 go-pugleaf

I get the following error when i try to compile gnu-chess 4.0 pl75 on a 
sun with sunos 4m:

make
gcc -O2 -Wall -DHAVE_LIBCURSES=1 -DHAVE_LIBM=1 -DHAVE_LIBTERMCAP=1 -DHAVE_FCNTL_H=1 -DHAVE_TIME_H=1 -DHAVE_SYS_FILE_H=1 -DHAVE_SYS_IOCTL_H=1 -DHAVE_SYS_TIME_H=1 -DHAVE_UNISTD_H=1 -DTIME_WITH_SYS_TIME=1 -DRETSIGTYPE=void -DHAVE_GETTIMEOFDAY=1 -DHAVE_STRSTR
=1 -DHAVE_STRTOL=1 -DHAVE_MEMSET=1  -DUSEINT -DCACHE -DGDX -DNULLMOVE -DWAY4PL64 -DHISTORY -DAGING -DKILLT -DUNLIMITEDCAPS -DPRUNE -DOLDTIME -DECO -DHASHSTATS -DHASHFILE=\"./gnuchess.hash\" -DLANGFILE=\"./gnuchess.lang\"  -o gnuchess mainN.o bookN.o genmo
vesN.o ataks.o utilN.o evalN.o init.o searchN.o dspcomN.o uxdsp.o  -ltermcap -lm -lcurses  -lm
ld: Undefined symbol 
   _tgetent 
   _tgetflag 
   _tgetstr 
   _tputs 
   _tgetnum 
   _tgoto 
collect2: ld returned 2 exit status
make: *** [gnuchess] Error 1


/* any idea what i can do? */

Have fun & a nice time! ;-)

Greetinx,

Kees Aleman

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