Optional Features

Some packages pay attention to -enable-feature options to configure, where feature indicates an optional part of the package. They may also pay attention to -with-package options, where package is something like gnu-as or x (for the X Window System). The README should mention any -enable- and -with- options that the package recognizes.

For packages that use the X Window System, configure can usually find the X include and library files automatically, but if it doesn't, you can use the configure options -x-includes=dir and -x-libraries=dir to specify their locations.