Re: [GENERAL] Can't Build 7.3.4 on OS X

Marko Karppinen <karppinen(at)pobox(dot)com> writes:
>> 3. What's with the WITHOUT_DARWIN_BUNDLE_LOADER hack for ecpg?

> The linker doesn't like symbols that are defined both in the shared
> object
> that's being linked and the bundle_loader binary. ecpg contains symbols
> that are in the postgresql binary, too, leading to the link failing with
> multiply-defined errors.

> The easiest way for me to fix this -- I don't really know my way around
> the
> source base -- was to specify by hand that the -bundle-loader flag isn't
> used on these occasions.

I think the right fix is that "-bundle-loader /path/to/postgres" should
be included in the link only for shlibs that are intended to be loaded
into the backend. Otherwise you are lying to the linker; the mere fact
that it fails to fail doesn't make it the right thing to do. (As an
example of how it could go wrong, what if there is a real undefined
symbol problem in libpq, but it happens to match some backend symbol?)

We used to have a similar requirement for some other platforms (AIX
I think), and there was a macro named something like BE_SHLIBS to
include the right platform-dependent stuff for such shlibs. Not sure
what happened to it. Peter, do you remember that?

regards, tom lane