optional_depends mysql     "--with-mysql"    "--without-mysql"    "MySQL support, also provides libev support for fdevent handlers"
optional_depends openldap  "--with-ldap"     "--without-ldap"     "LDAP support"
optional_depends attr      "--with-attr"     "--without-attr"     "EA for XFS support"
optional_depends valgrind  "--with-valgrind" "--without-valgrind" "valgrind debugger"
optional_depends openssl   "--with-openssl"  "--without-openssl"  "OpenSSL support"
optional_depends pcre      "--with-pcre"     "--without-pcre"     "regular expression support"
optional_depends bzip2     "--with-bzip2"    "--without-bzip2"    "bzip2 mod_compress"
optional_depends gamin     "--with-fam"      "--without-fam"      "FAM/Gamin filesystem monitoring"
optional_depends lua       "--with-lua"      "--without-lua"      "Lua engine for mod_cml"
optional_depends zlib      "--with-zlib"     "--without-zlib"     "for compression support"
optional_depends gdbm      "--with-gdbm"     "--without-gdbm"     "storage for mod_trigger_b4_dl support"
optional_depends memcached "--with-memcache" "--without-memcache" "for for mod_trigger_b4_dl support"
optional_depends fcgi      ""                ""                   "for CGI support"
optional_depends systemd   ""                ""                   "for systemd style boot scripts"
optional_depends %PHP      ""                ""                   "for PHP support"
