In a note in 5.9.5. EXTRACT_DEPENDS there is a broken link to chapter 17[1], which should probably be replaced with this link[2]. [1]: https://www.freebsd.org/doc/en_US.ISO8859-1/books/porters-handbook/book.html#uses-values [2]: https://www.freebsd.org/doc/en_US.ISO8859-1/books/porters-handbook/book.html#uses
A commit references this bug: Author: tobik Date: Fri Jun 1 13:52:40 UTC 2018 New revision: 51756 URL: https://svnweb.freebsd.org/changeset/doc/51756 Log: Fix broken 'uses-values' links in the Porter's Handbook The USES chapter sets an xml:id on its title tag but this doesn't seem to generate an anchor. As a consequence there currently are several 'uses-values' xrefs that point to nowhere. This is only really noticeable in the single page HTML version (book.html) of the handbook. PR: 227123 Reported by: 0mp Approved by: mat Differential Revision: https://reviews.freebsd.org/D15642 Changes: head/en_US.ISO8859-1/books/porters-handbook/makefiles/chapter.xml head/en_US.ISO8859-1/books/porters-handbook/special/chapter.xml head/en_US.ISO8859-1/books/porters-handbook/uses/chapter.xml
Fixed. Thanks for the report!