Compiling OpenSSH

[Peter S. Martinez]

When doing a make I get the following error message:

 cc -o ssh ssh.o sshconnect.o sshconnect1.o sshconnect2.o log-client.o
readconf.o clientloop.o -L.  -L/opt/openssl/lib -L/opt/openssl -lssh
-lopenbsd-compat -lz  -lpam -lcrypto -lRSAglue -lrsaref
/usr/ccs/bin/ld: Can't find library for -lz
*** Error exit code 1

Stop.

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openssl is installed. Will appreciate any help. Please e-mail to:
[EMAIL PROTECTED]