Re: Small memory fixes for pg_createsubcriber

=?utf-8?Q?Dagfinn_Ilmari_Manns=C3=A5ker?= <ilmari@ilmari.org> writes:
> Andres Freund <andres@anarazel.de> writes:
>> Particularly for something like libpq it's not quitetrivial to add
>> attributes like this, of course. We can't even depend on pg_config.h.
>> One way would be to define them in libpq-fe.h, guarded by an #ifdef, that's
>> "armed" by a commandline -D flag, if the compiler is supported?

> Does it need a -D flag, wouldn't __has_attribute(malloc) (with the
> fallback definition in c.h) be enough?

libpq-fe.h has to be compilable by application code that has never
heard of pg_config.h let alone c.h, so we'd have to tread carefully
about not breaking that property.  But it seems like this would be
worth looking into.

            regards, tom lane