Re: consider -Wmissing-variable-declarations

On 09/05/2024 12:23, Peter Eisentraut wrote:
> In [0] I had noticed that we have no automated verification that global
> variables are declared in header files. (For global functions, we have
> this through -Wmissing-prototypes.) As I mentioned there, I discovered
> the Clang compiler option -Wmissing-variable-declarations, which does
> exactly that. Clang has supported this for quite some time, and GCC 14,
> which was released a few days ago, now also supports it. I went and
> installed this option into the standard build flags and cleaned up the
> warnings it found, which revealed a number of interesting things.

Nice! More checks like this is good in general.

> Attached are patches organized by sub-topic. The most dubious stuff is
> in patches 0006 and 0007. A bunch of GUC-related variables are not in
> header files but are pulled in via ad-hoc extern declarations. I can't
> recognize an intentional scheme there, probably just done for
> convenience or copied from previous practice. These should be organized
> into appropriate header files.

+1 for moving all these to header files. Also all the "other stuff" in
patch 0007.

--
Heikki Linnakangas
Neon (https://neon.tech)