depends zlib        &&
optional_depends libtomcrypt '' '' 'system tomcrypt' &&
optional_depends libtommath  '' '' 'system tommath'  &&
optional_depends linux-pam '--enable-pam' '--disable-pam' 'PAM support' &&
optional_depends shadow    '--enable-shadow' '--disable-shadow' 'Shdow support' &&
optional_depends SYSTEM-LOGGER '--enable-syslog' '--disable-syslog' 'logging support' 
