depends erlang && depends expat && optional_depends SSL \ "--enable-openssl" \ "--disable-openssl" \ "openssl support (recommended)" && optional_depends zlib \ "--enable-zlib" \ "--disable-zlib" \ "stream compression support" && optional_depends linux-pam \ "--enable-pam" \ "--disable-pam" \ "pam support" && optional_depends unixodbc \ "--enable-odbc" \ "--disable-odbc" \ "enable ODBC"