Hello People, when i try to install clamcour from terminal, it gives me this error, somebody can help me?

calmcourdir# ./configure

checking for libraries containing socket functions... -lc
checking for socket... yes
checking for bind... yes
checking for listen... yes
checking for accept... yes
checking for shutdown... yes
checking for socklen_t... yes
checking for struct sockaddr_un.sun_len... no


System log functions
checking syslog.h usability... yes
checking syslog.h presence... yes
checking for syslog.h... yes
checking for openlog... yes
checking for syslog... yes
checking for closelog... yes


Time functions
checking whether time.h and sys/time.h may both be included... yes
checking whether struct tm is in sys/time.h or time.h... time.h
checking for localtime_r... yes
checking for strftime... yes
checking for unistd.h... (cached) yes
checking limits.h usability... yes
checking limits.h presence... yes
checking for limits.h... yes
checking for sysconf... yes


BZip2 support
checking bzlib.h usability... no
checking bzlib.h presence... no
checking for bzlib.h... no
checking for BZ2_bzWriteOpen in -lbz2... no


GZip support
checking zlib.h usability... no
checking zlib.h presence... no
checking for zlib.h... no
checking for gzopen in -lz... no


LibClamAV support
checking for /usr/bin/clamav-config... no
checking for /usr/local/bin/courier-config... no
checking for /usr/clamav/bin/clamav-config... no
checking for /usr/local/clamav/bin/clamav-config... no
./configure: line 25234: : command not found
configure: error: Cannot find clamav-config