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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 16:26:17 +0100
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (windows-nt)

On Mon 06 Aug 2018, Eli Zaretskii wrote:

>> From: Andy Moreton <address@hidden>
>> Date: Mon, 06 Aug 2018 09:30:27 +0100
>> 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 ?
> Because different versions of GCC support different warning options,
> and using an option that is not supported by the installed version of
> GCC will cause warnings and sometimes errors.

That is not what is being discussed. The configure script run 146 checks
to determine if gcc warning options are supported, but the emacs
configure script mentions a far smaller number.

Why are dozens of configure checks being run for things that emacs
configure does not care about, and whose only effect is to slow down
the build ?


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