e9e768f7e3
The GNU extension bits in the base system are old, no longer faithful to upstream, and surprising in some regards. Switch to documenting WITH_GNU_GREP_COMPAT and default GNU_GREP_COMPAT to OFF in the name of good behavior. According to http://www.regular-expressions.info, GNU extensions: - Add missing quantifiers to BREs: \?, \+ - Add branching to BREs: \| - Add backreferences (\1 through \9) to EREs - Add \w, \W, \s, and \S corresponding to :alnum:, [^[:alnum:]], :space:, and [^[:space:]] respectively - Add word boundaries and anchors: \b: word boundary \B: not word boundary \<: Strt of word \>: End of word \`: Start of subject string \': End of subject string These extensions are still available in /usr/bin/grep by default today, as it is still GNU grep. As part of the bsdgrep migration plan these extensions may be added to bsdgrep's regex support if necessary. Submitted by: Kyle Evans <kevans91 at ksu.edu> Reviewed by: cem Differential Revision: https://reviews.freebsd.org/D10114
$FreeBSD$ This directory tree contains tools used for the maintenance and testing of FreeBSD. There is no toplevel Makefile structure since these tools are not meant to be built as part of the standard system, though there may be individual Makefiles in some of the subdirs. Please read the README files in the subdirs for further information.