Re: clang's -Wmissing-variable-declarations shows some shoddy programming

On Sat, Dec 14, 2013 at 04:52:28PM +0100, Andres Freund wrote:
> Hi,
>
> Compiling postgres with said option in CFLAGS really gives an astounding
> number of warnings. Except some bison/flex generated ones, none of them
> looks acceptable to me.
> Most are just file local variables with a missing static and easy to
> fix. Several other are actually shared variables, where people simply
> haven't bothered to add the variable to a header. Some of them with
> comments declaring that fact, others adding longer comments, even others
> adding longer comments about that fact.
>
> I've attached the output of such a compilation run for those without
> clang.

Now that pg_upgrade has stabilized, I think it is time to centralize all
the pg_upgrade_support control variables in a single C include file that
can be used by the backend and by pg_upgrade_support.  This will
eliminate the compiler warnings too.

The attached patch accomplishes this.

--
  Bruce Momjian  <bruce@momjian.us>        http://momjian.us
  EnterpriseDB                             http://enterprisedb.com

  + Everyone has their own god. +