Error while installing Vpopmail with LDAP

Hi Everyone,

I'm new to Vpopmail Mailing List. 
Yesterday I was trying to install Vpopmail 5.5.0 with LDAP support.
But while compiling I get the below error:

checking for ev_loop_new in -lev... no
configure: WARNING:
===                                                      
===
configure: WARNING: ===               libev not
found                         ===
configure: WARNING: === You will be unable to build the vpopmail
usage daemon ===
configure: WARNING:
===                                                      
===
checking whether any discontinued --enable commands have been used...
yes
configure: error: --enable-ldap has been superceded. Please use
--enable-auth-module=ldap instead

Command I'm typing is "./configure --enable-ldap"

And when I try with command "./configure --enable-auth-module=ldap" I
get the below error:

configure: WARNING:
===                                                      
===
configure: WARNING: ===               libev not
found                         ===
configure: WARNING: === You will be unable to build the vpopmail
usage daemon ===
configure: WARNING:
===                                                      
===
checking whether any discontinued --enable commands have been used...
yes
configure: error: --enable-auth-module is no longer used.  Please
select a backend from the backends directory

I read on website that vpopmail 5.5.0 support LDAP authentication. So
what's wrong I'm doing? Kindly guide me for the same.

Thanks and Regards,

Amit




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