Re: snippets/unused-parameter

[Paul Eggert]

On 1/26/22 19:17, Thien-Thi Nguyen wrote:
> I just now updated a local gnulib tree and re-ran autogen.sh
> (for GNU RCS), and i see:
>
>   Notice from module snippet/unused-parameter:
>     This module is obsolete.
>
> The gnulib.info documentation mentions "obsolete" in several
> places, but it seems to be oriented toward gnulib hackers rather
> than users.
>
> My question is: What should i do w/ this module?
> (a) Leave it alone -- "obsolete" is not "broken".

That's OK in the short term but in the long run I suggest using 
_GL_UNUSED instead.


> Related question: Where can i find info on how/why this module
> became obsolete?

I used the shell command 'git log modules/snippet/unused-parameter', 
which pointed me to commit d3837928885e91c9ddd465240b90a97aa342fda6 
dated 2021-08-22. Here's part of the email chain on this topic:

https://lists.gnu.org/r/bug-gnulib/2021-08/msg00146.html
https://lists.gnu.org/r/bug-gnulib/2021-08/msg00109.html
https://lists.gnu.org/r/bug-gnulib/2021-08/msg00097.html

You're right that this is a bit obscure. The short version is: use 
_GL_UNUSED instead of _GL_UNUSED_PARAMETER. You can see examples of how 
to use _GL_UNUSED in Gnulib: it goes at the start of the parameter 
declaration.