cgilib-0.5 error for configuring xymon

hi,
i hv rhel 5.2 64 bit machione.when i do make install for cgilib-0.5,i get
fallowing -
 make install
cc -I. -Wall -O2 -g   -c -o cgitest.o cgitest.c
cgitest.c: In function ‘main’:
cgitest.c:108: warning: implicit declaration of function ‘strcmp’
cgitest.c:116: error: expected ‘)’ before ‘Library’
cgitest.c:129: warning: implicit declaration of function ‘strlen’
cgitest.c:129: warning: incompatible implicit declaration of built-in
function ‘strlen’
make: *** [cgitest.o] Error 1


-- 
Pankaj V. Dorlikar