[PD-dev] libpd search paths

[Dan Wilcox]

A few things:

1. libpd does not use any paths, settings, audio/midi backends, etc from
desktop pd. It is only the core and less than "pd without the gui." This is
by design as it makes no assumptions about the environment since it can be
running in all manner of places. This means it will only search paths
relative to an opened patch and those added explicitly by
llibpd_add_to_search_path().

2. Loading an external, whether it was compiled against 0.47 or 0.49 should
work as, largely, the pd API has not changed that much.

3. libpd needs to be built with -DHAVE_LIBDL in order to be able to load
separate, precompiled externals.

4. Some environments do *not* allow loading dynamic libraries for
legal/security reasons, ie. iOS. I don't this is the problem, but it's good
to know...

I image you're issue is more to do with 3.

Message: 1
> Date: Wed, 13 Feb 2019 15:04:19 +0100
> From: Joseph Larralde <joseph.larralde at gmail.com>
> To: Giulio Moro <giuliomoro at yahoo.it>, Lucas Cordiviola
>         <lucarda27 at hotmail.com>, pd-dev <pd-dev at lists.iem.at>
> Subject: Re: [PD-dev] libpd search paths
> Message-ID: <2354c1c4-e6db-9143-1402-76dcd37b43a8 at gmail.com>
> Content-Type: text/plain; charset="utf-8"; Format="flowed"
>
> Mmmh you might have found the clue ...
> Actually I built the externals against pd version 0.49-0 and it makes
> sense that they load properly with the same version.
> node-libpd comes with an arm libpd binary which seems to come from an
> older version of pd (added 1 year ago).
> I can already tell that it's not an architecture issue because
> everything is working on my pi : the addon is loading and running
> abstractions when used in a node program, and pd is loading and running
> my externals.
> Only loading my externals from node-libpd doesn't work.
> Still trying to get a local version of node-libpd to work ... then I'll
> replace the libpd.so with one that I'll build from the latest version.
> I can't see another explanation.
> Do you know something about incompatibilities between different versions
> of pd ?
> The libpd.so used by the addon is probably not older than 0.47
>


-- 
Dan Wilcox
@danomatika
danomatika.com
robotcowboy.com
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