Re: perl 5.36, C99, -Wdeclaration-after-statement -Wshadow=compatible-local

Hi,

On 2022-11-02 19:57:45 -0400, Tom Lane wrote:
> Andres Freund <andres@anarazel.de> 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