...the recipient's choice (including proprietary). * 0. Definitions. * "Covered Code" is the source or object code of a version of Autoconf that is a covered work under this License. "Normally Copied Code" for a version of Autoconf means all parts of its Covered Code which that version can copy from its code (i.e., not from its input file) into its minimally verbose, non-debugging and non-tracing output. "Ineligible Code" is Covered Code that is not Normally Copied Code. * 1....
--Autoconf Configure Script Exception License, Version 3.0. (Paragraph 5.)