./configure --enable-agent  ##Successful##

checking for architecture... freebsd (freebsd10.1)
checking size of void *... 8
checking for ICONV support... yes
checking for mkdir -p candidate... ok (./install-sh -c -d)
checking that generated files are newer than configure... done


Configuration:
  Detected OS:           freebsd10.1
  Install path:          /usr/local
  Compilation arch:      freebsd
  Compiler:              cc
  Compiler flags:        -g -O2
  Enable server:         no
  Enable proxy:          no
  Enable agent:          yes
  Agent details:
    TLS:                   no
    Linker flags:          -rdynamic
    Libraries:             -lkvm -lm -lexecinfo -ldevstat
  Enable Java gateway:   no
  LDAP support:          no
  IPv6 support:          no

***********************************************************
*            Now run 'make install'                       *
*                                                         *
*            Thank you for using Zabbix!                  *
*              <http://www.zabbix.com>                    *
***********************************************************

./configure --enable-agent --with-openssl ##Failure##

checking for architecture... freebsd (freebsd10.1)
checking size of void *... 8
checking for OpenSSL support... yes
checking for ICONV support... configure: error: Unable to use iconv (libiconv check failed)