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(automake.info)Tags

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Interfacing to `etags'
======================

   Automake will generate rules to generate `TAGS' files for use with
GNU Emacs under some circumstances.

   If any C, C++ or Fortran 77 source code or headers are present, then
`tags' and `TAGS' targets will be generated for the directory.

   At the topmost directory of a multi-directory package, a `tags'
target file will be generated which, when run, will generate a `TAGS'
file that includes by reference all `TAGS' files from subdirectories.

   Also, if the variable `ETAGS_ARGS' is defined, a `tags' target will
be generated.  This variable is intended for use in directories which
contain taggable source that `etags' does not understand.

   Here is how Automake generates tags for its source, and for nodes in
its Texinfo file:

     ETAGS_ARGS = automake.in --lang=none \
      --regex='/^@node[ \t]+\([^,]+\)/\1/' automake.texi

   If you add filenames to `ETAGS_ARGS', you will probably also want to
set `TAGS_DEPENDENCIES'.  The contents of this variable are added
directly to the dependencies for the `tags' target.

   Automake will also generate an `ID' target which will run `mkid' on
the source.  This is only supported on a directory-by-directory basis.