Note that you can use "-" with --output=file in Etags.

diff --git a/doc/emacs/ChangeLog b/doc/emacs/ChangeLog
index 73f1bb9e2fdf31574e95126afa8879a3f2723347..9b7af92255c8a1419e7221eed424977e84e88f50 100644 (file)
--- a/doc/emacs/ChangeLog
+++ b/doc/emacs/ChangeLog
@@ -1,3 +1,8 @@
+2007-11-15  Francesco Potort\e,Al\e(B  <pot@gnu.org>
+
+       * maintaining.texi (TEXTAGS): note that you can use "-" for stdout with
+       --output=file.
+
 2007-11-13  Martin Rudalics  <rudalics@gmx.at>
 
        * help.texi (Help Summary, Apropos, Misc Help): Fix typos.

diff --git a/doc/emacs/maintaining.texi b/doc/emacs/maintaining.texi
index 988d5890b8cb96b1e07795fae9846b25c383587a..24337cb6f9e197b010e1b12fd547e25b1ebd2883 100644 (file)
--- a/doc/emacs/maintaining.texi
+++ b/doc/emacs/maintaining.texi
@@ -367,7 +367,10 @@ etags @var{inputfiles}@dots{}
 
 @noindent
 The @code{etags} program reads the specified files, and writes a tags
-table named @file{TAGS} in the current working directory.
+table named @file{TAGS} in the current working directory.  You can
+optionally specify a different file name for the tags table by using the
+@samp{--output=@var{file}} option; specifying @file{-} as a file name
+prints the tags table to standard output.
 
   If the specified files don't exist, @code{etags} looks for
 compressed versions of them and uncompresses them to read them.  Under
@@ -406,7 +409,8 @@ well as the files it directly contains.
 directory where the tags file was initially written.  This way, you can
 move an entire directory tree containing both the tags file and the
 source files, and the tags file will still refer correctly to the source
-files.  If the tags file is in @file{/dev}, however, the file names are
+files.  If the tags file is @file{-} or is in the @file{/dev} directory,
+however, the file names are 
 made relative to the current working directory.  This is useful, for
 example, when writing the tags to @file{/dev/stdout}.