Warning when i want to install Net-SNMP

[Syed Zulhilmi Tuan Sharif]

How can i solve this problem?

 
[root at info Net-SNMP-4.0.3]# perl Makefile.PL
Checking if your kit is complete...
Looks good
Warning: prerequisite Crypt::DES 2.03 not found.
Warning: prerequisite Digest::HMAC 1.00 not found.
Warning: prerequisite Digest::SHA1 1.02 not found.
Writing Makefile for Net::SNMP
[root at info Net-SNMP-4.0.3]#
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