> > According to our RELEASE_CHANGES documentation:
>       
> >     The major version number should be updated whenever the 
> source of the
> >     library changes to make it binary incompatible. Such 
> changes include,
> >     but are not limited to:
>       
> >     1. Removing a public function or structure (or typedef, 
> enum, ...)
>       
> >     2. Modifying a public functions arguments.
>       
> >     3. Removing a field from a public structure.
> 
> > so while I don't think we need to update the major number for every 
> > PostgreSQL major release, the removal of prog_name probably 
> required a 
> > major bump.
> 
> Well, the point is that get_progname *isn't* a "public" function.
> We never advertised it as a libpq entry point.
> 
> What this really brings out to me is that our development 
> process doesn't impose a very strong boundary between libpq 
> and our bundled client programs.  If the client programs were 
> enforced to use only the documented public API of libpq then 
> we'd not be having this discussion
> --- but stuff such as libpgport support functions tends to 
> slip by under the radar.  IIRC we've been bitten in exactly 
> this way at least once before.  What I'm suggesting is that 
> we just solve the whole class of problems permanently, by 
> abandoning the assumption that we're going to guarantee 
> binary compatibility across major releases.  I don't think 
> that promise is really buying us anything very critical.
> 
> If we don't go that way, then we need to have some automatic 
> check that none of the client programs are using symbols they 
> shouldn't be from libpq.  (Hmm ... will the existence of the 
> Windows port help here?)

Yes, it will. At least it will refuse to link with references that are
not in the libpqdll.def file. It won't change if the *signature* of the
functions change.

<flashback
href="http://archives.postgresql.org/pgsql-hackers-win32/2004-10/msg0004
2.php"> ;-) + thread.

//Magnus

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