Hello, this is my problem

#./configure 		-- ok
#make			-- nop

zziplib/zzip-file.c: In function `zzip_file_open':
zziplib/zzip-file.c:116: `strcasecmp' undeclared (first use in this function)
zziplib/zzip-file.c:116: (Each undeclared identifier is reported only once
zziplib/zzip-file.c:116: for each function it appears in.)
*** Error code 1

Stop.
make: stopped in /usr/src/mail/clamav-0.54/libclamav
*** Error code 1

Which is the problem ???


Thanks