Re: [PATCH, RFC] etags/ctags v22.0.92 break Linux kernel `make TAGS/tags`

[Francesco Potorti` <pot@gnu.org>]

>The bug only appears if some `make *config` has succeeded.  Try:
>
>	make allnoconfig
>	make TAGS
>
>I have verified that the above shows the bug with 2.6.18 Linux.

Okay, I found out why and corrected it.  Please try it yourself and let
me know.  Thank you for finding this bug.

This is the relevant Changelog entry:

2006-12-28  Francesco Potortì  <pot@gnu.org>

	* etags.c (readline): When creating a relative file name from a
	#line directive, leave the file name alone.  The previous
	behaviour was to make it relative to the tags file directory,
	under the hypothesis that the #line directive file name was
	relative to the directory of the tagged file.  That hypothesis is
	wrong with Cpp and Lex.

and this is the patch:

@@ -6285,7 +6285,7 @@ readline (lbp, stream)
 		  name = lbp->buffer + start;
 		  *endp = '\0';
 		  canonicalize_filename (name); /* for DOS */
-		  taggedabsname = absolute_filename (name, curfdp->infabsdir);
+		  taggedabsname = absolute_filename (name, tagfiledir);
 		  if (filename_is_absolute (name)
 		      || filename_is_absolute (curfdp->infname))
 		    taggedfname = savestr (taggedabsname);