* doc/autoconf.texi (Limitations of Usual Tools): Warn about other

nonstandard grep R.E. escape sequences.

diff --git a/ChangeLog b/ChangeLog
index b6d5608882e803433f2255d096a59b2fcffcfcd2..29c6c0025ccc1acb7c6e81482185575049bcf038 100644 (file)
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2007-03-19  Paul Eggert  <eggert@cs.ucla.edu>
+
+       * doc/autoconf.texi (Limitations of Usual Tools): Warn about other
+       nonstandard grep R.E. escape sequences.
+
 2007-03-17  Jim Meyering  <jim@meyering.net>
 
        * doc/autoconf.texi: Adjust grammar around use of "heuristics".

diff --git a/doc/autoconf.texi b/doc/autoconf.texi
index c1f1abbf431fdce0cce98c2ed9a8333a7d115bd6..817ab5c4c88da09477a8cfd8f32107ba6c23a803 100644 (file)
--- a/doc/autoconf.texi
+++ b/doc/autoconf.texi
@@ -13563,7 +13563,9 @@ escape characters in the string @samp{$()*.0123456789[\^@{@}}.  For example,
 alternation, @samp{\|}, is common but Posix does not require its
 support in basic regular expressions, so it should be avoided in
 portable scripts.  Solaris and HP-UX @command{grep} do not support it.
-Similarly, @samp{\<}, @samp{\>}, @samp{\+} and @samp{\?} should be avoided.
+Similarly, the following escape sequences should also be avoided:
+@samp{\<}, @samp{\>}, @samp{\+}, @samp{\?}, @samp{\`}, @samp{\'},
+@samp{\B}, @samp{\b}, @samp{\S}, @samp{\s}, @samp{\W}, and @samp{\w}.
 
 
 @item @command{join}