bug#8802: cperl-write-tags function in cperl-mode.el hard coded tags-file-name

[Stefan Monnier]

>> So would I suggest to re-factory cperl-mode.el and change "TAGS" to a
>> variable? Like following:
>> (defvar cperl-tags-file-name "TAGS" "TAGS file name"

> That sounds like a reasonable request to me, but Emacs is in a feature
> freeze at the moment, and I'm not sure adding stuff like this is
> "allowed" during the freeze.

I'd rather that such a change be installed in Ilya's upstream
version first.  We already have plenty of merge problems because of
patches he rejected.  BTW, the recent change to use define-derived-mode
introduced a problem where the cperl-mode-hook gets called twice, so
I think we had better revert it.


        Stefan