optional_depends "gdbm" \ "--with-gdbm" \ "--without-gdbm" \ "for GNU database manager support" && optional_depends "gmp" \ "--with-gmp" \ "--without-gmp" \ "for GNU mp bignum support" && optional_depends "MYSQL" \ "--with-mysql" \ "--without-mysql" \ "to support mysql database access" && optional_depends "nasm" \ "" \ "" \ "for x86 MMX support in Image module" && optional_depends "zlib" \ "--with-zlib" \ "--without-zlib" \ "to support gz compression" && optional_depends "nettle" \ "--with-nettle" \ "--without-nettle" \ "to support crypto functions"