Tom Lane wrote:
> Bruce Momjian <pgman@candle.pha.pa.us> writes:
> > How is this any better than just mentioning the *.o file and letting the
> > default rules compile it. I don't understand how linking to the current
> > directory gets us anything. Now, if you did a 'make -C dir target' that
> > would be different.
>
> The whole point of the pushups for libpq is that we DON'T want the
> default rules. We need to compile it PIC so that it can go into a
> shared library. This will not be the same object file built in the
> ports directory.
Oh, so specifying the full path for the *.o allows it to use an existing
*.o, while putting it in the directory forces a recompile with the
current Makefile. Got it. Libpq has all of them done.
I see the comment in libpq/Makefile now:
# We use several backend modules verbatim, but since we need to
# compile with appropriate options to build a shared lib, we can't
# necessarily use the same object files as the backend uses. Instead,
# symlink the source files in here and build our own object file.
Thanks.
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