On 04.04.2022 15:49, Antoine Rousseau wrote:

ABI break for multi-instance libpd

only externals already compiled for multi-instance would have to be recompiled, I think.

And it wouldn't allow current externals to be used in a multi-instance context.

But it would allow a Pd compiled with PDINSTANCE, or a single-instance libpd app compiled with PDINSTANCE to load current externals (compiled without PDINSTANCE).

Exactly.