On 21/11/2024 10:18, Simon Josefsson via bug-libtool via Bug reports for 
the GNU libtool shared library maintenance tool wrote:
> Hi
> 
> Gordon noticed that 'make check' in libidn prints warnings on macOS,
> which are coming from libtool:
> 
> libtool: warning: '-no-install' is ignored for aarch64-apple-darwin23.6.0
> libtool: warning: assuming '-no-fast-install' instead
> 
> https://lists.gnu.org/archive/html/help-libidn/2024-11/msg00006.html
> https://gitlab.com/libidn/libidn/-/jobs/8321237800
> 
> I haven't analyzed the code in libtool behind the warning, but looking
> at this from the outside, if some feature is known to not be supported
> on some platform, it doesn't make a lot of sense to warn about that fact
> on every compilation.

The warning messages for darwin have been present since this commit [1],
and for windows, it has been over two decades. I could remove the
warning message entirely. I think existing users should already be aware
of the warning, but I would like to avoid confusion with new users.

> So two ideas:
> 
> 1) Could we silence the warning generally?
> 
> or
> 
> 2) Could we silence the warning on some set of architectures which is
> known to not support this?  And document that property.
> 
> or
> 
> 3) Have a mechanism for maintainers to disable this warning?

Users can disable all libtool warnings with '--warnings=none' or
'--no-warnings', which I just realised the second is not documented in
the manual. libtool does not have warning categories (except 'all' and
'none'), so silencing the warning for some architectures by default
would mean just removing the existing warning messages for them.

I can update the documentation to reflect what the comments state and
remove the warning messages, but anything else would likely involve a
large rework to how libtool warnings operate.

[1] 
https://git.savannah.gnu.org/cgit/libtool.git/commit/?id=51f91963e600423f22d8c4ee01f2bf3a9e7a63bb

-- 
Ileana Dumitrescu

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