Re: [PATCH] add new AC_PROG_AR helper

[Mike Frysinger]

On 26 Jan 2022 10:03, Zack Weinberg wrote:
> It might make sense for Autoconf's AC_PROG_AR to check whether the 'ar' it 
> finds is at least basically command-line compatible with traditional Unix 'ar'

maybe ?  automake & libtool haven't been doing this, so i'm not sure how
useful such a test would be in practice.  and what would autoconf do if
it didn't think `ar` is compatible ?  issue an error & abort ?

> and maybe also check whether it's going to spew "`u' modifier ignored since 
> `D' is the default (see `U')" messages like current binutils ar tends to (see 
> e.g. https://bugzilla.redhat.com/show_bug.cgi?id=1155273 -- as far as I can 
> tell the message is harmless, but if we can reduce the number of junk bug 
> reports that random autotools-using projects have to field, that's a Good 
> Thing).

similarly, what are you expecting autoconf to do with this information ?
should we ignore that `ar` ?  or it wrap it ?  or do something else ?
-mike

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