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Re: New warnings on emacs-26 branch with gcc 8.2.0

From: Andy Moreton
Subject: Re: New warnings on emacs-26 branch with gcc 8.2.0
Date: Mon, 06 Aug 2018 09:30:27 +0100
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (windows-nt)

On Sun 05 Aug 2018, Paul Eggert wrote:

> Andy Moreton wrote:
>> Of the 562 "checking" lines when running configure on master, 146 of
>> them are "checking whether C compiler handles -W*". This is excessively
>> time consuming. Can gnulib not do less work to acheive this end, or do
>> the work more efficiently ?
> Yes, it probably could, but it'd take some hacking to get it to work right. So
> far, nobody has volunteered to do that. It'd be nontrivial, as the
> configure-time code needs to work with older GCCs and with compilers other
> than GCC.

Why does it need to check every gcc warning though, rather than just the
-W* and -Wno-* warnings that have been requested in the configury ?


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