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From: Andres Freund <[email protected]>
To: Tom Lane <[email protected]>
Cc: Peter Eisentraut <[email protected]>
Cc: [email protected]
Cc: David Rowley <[email protected]>
Cc: Dagfinn Ilmari Mannsåker <[email protected]>
Subject: Re: perl 5.36, C99, -Wdeclaration-after-statement -Wshadow=compatible-local
Date: Wed, 2 Nov 2022 17:03:34 -0700
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
References: <[email protected]>
	<[email protected]>
	<[email protected]>
	<[email protected]>

Hi,

On 2022-11-02 19:57:45 -0400, Tom Lane wrote:
> Andres Freund <[email protected]> writes:
> > On 2022-11-01 17:00:27 -0400, Peter Eisentraut wrote:
> >> Python has the same issues.  There are a few other Python-embedding projects
> >> that use -Wdeclaration-after-statement and complain if the Python headers
> >> violate it.  But it's getting tedious.  -isystem would be a better solution.
> 
> > Which dependencies should we convert to -isystem?
> 
> Color me confused about what's being discussed here.  I see nothing
> in the gcc manual suggesting that -isystem has any effect on warning
> levels?

It's only indirectly explained :(

           The -isystem and -idirafter options also mark the directory as a system directory, so that it gets the same special treatment that is applied to
           the standard system directories.

and then https://gcc.gnu.org/onlinedocs/cpp/System-Headers.html

Greetings,

Andres Freund

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