optional_depends  SSL                                        \
                  "--enable-ssl"                                 \
                  ""                                             \
                  "Enable ssl gatewaying support using OpenSSL"  &&

optional_depends  linux-pam                                   \
                  "--enable-basic-auth-helpers=getpwnam,PAM"  \
                  "--enable-basic-auth-helpers=getpwnam"      \
                  "For PAM Authentication"

.