Craig Ringer <craig(at)2ndquadrant(dot)com> writes:
> Is there any reason _not_ to PGDLLEXPORT all GUCs, other than cosmetic
> concerns?
That seems morally equivalent to "is there a reason not to make every
static variable global?".
IOW, no, I don't accept this proposition. Every time we DLLEXPORT some
variable, we lose the freedom to redefine it later. So DLLEXPORT'ing GUCs
should be on a case by case basis, just as for any other variable. In
some cases it might be smarter to export a wrapper function.
regards, tom lane