etags
automake will generate rules to generate `TAGS' files for
use with GNU Emacs under some circumstances.
If any C 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.
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