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Subject: Re: RFC: Extension Packaging & Lookup
From: "David E. Wheeler" <david@justatheory.com>
In-Reply-To: <E21B85B5-6412-4D08-A10C-6E11CF6926F9@cleverelephant.ca>
Date: Tue, 29 Oct 2024 13:16:21 -0400
Cc: PostgreSQL Hackers <pgsql-hackers@postgresql.org>,
 Gabriele Bartolini <gabriele.bartolini@enterprisedb.com>,
 Peter Eisentraut <peter@eisentraut.org>,
 Christoph Berg <myon@debian.org>,
 Andres Freund <andres@anarazel.de>
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To: Paul Ramsey <pramsey@cleverelephant.ca>
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On Oct 29, 2024, at 12:23, Paul Ramsey <pramsey@cleverelephant.ca> =
wrote:

> Question for the more knowledgable, how are binary distribution =
systems like Conda and others shipping DLLs such that different packages =
don=E2=80=99t clobber each other?

I=E2=80=99m not familiar with Conda, but from its docs[1], it seems to =
rely on a value compiled into an app:

> *   On Linux, the $ORIGIN variable allows you to specify "relative to =
this file as it is being executed".
> *   On macOS, the variables are:
>     *   @rpath---Allows you to set relative links from the system load =
paths.
>     *   @loader_path---Equivalent to $ORIGIN.
>     *   @executable_path---Supports the Apple .app directory approach, =
where libraries know where they live relative to their calling =
application.


Thinks are a bit more complicated on Windows, which doesn=E2=80=99t =
support something like -rpath.

D

[1]: =
https://docs.conda.io/projects/conda-build/en/latest/resources/use-shared-=
libraries.html=