Hi Sawada-san,
> In my Mac environment where non-Exuberant ctags and emacs 28.2 are
> installed, the generated etags file cannot be loaded by emacs due to
> file format error. The generated TAGS file is:
>
> % head -10 TAGS
>
> ) /
> sizeof(BlockNumber)sizeof(BlockNumber)117,3750
> my
> @newa newa395,10443
>
> variadic array[1,2]:array[1,2]56,1803
>
> variadic array[]::inarray[]::i72,2331
>
> variadic array[array64,2111
>
> variadic array[array68,2222
>
> variadic array[array76,2441
> (2 * (2 53,1353
> my $fn fn387,10147
> startblock 101,4876
>
> Since the etags files consist of multiple sections[1] we cannot sort
> the generated etags file. With the attached patch, make_etags (with
> non-Exuberant ctags) generates a correct format etags file and it
> works:
>
> % head -10 TAGS
>
> /Users/masahiko/pgsql/source/postgresql/GNUmakefile,1187
> subdir 7,56
> top_builddir 8,65
> docs:docs13,167
> world-contrib-recurse:world-contrib-recurse19,273
> world-bin-contrib-recurse:world-bin-contrib-recurse24,394
> html man:html man26,444
> install-docs:install-docs29,474
> install-world-contrib-recurse:install-world-contrib-recurse35,604
>
> BTW regarding the following comment, as far as I can read the
> Wikipedia page for ctags[1], Exuberant ctags file doesn't have a
> header section.
>
> # Exuberant tags has a header that we cannot sort in with the other entries
> # so we skip the sort step
> # Why are we sorting this? I guess some tag implementation need this,
> # particularly for append mode. bjm 2012-02-24
> if [ ! "$IS_EXUBERANT" ]
>
> Instead, the page says that sorting non-Exuberant tags file allows for
> faster searching on of the tags file. I've fixed the comment
> accordingly too.
>
> Regards,
>
> [1] https://en.wikipedia.org/wiki/Ctags#Etags_2
Sorry for late reply and thanks for the patch!
I have confirmed the error with make_etags on my Mac (emacs 28.1 +
non-Exuberant ctags), and the error is fixed by your patch. Also I
have confirmed the patch does not affect make_etags on my Linux (emacs
26.3 + Exuberant ctags).
I will push the fix to REL_15_STABLE and master branch if there's no
objection.
Best reagards,
--
Tatsuo Ishii
SRA OSS LLC
English: http://www.sraoss.co.jp/index_en/
Japanese:http://www.sraoss.co.jp