[PD] GEM external "pd_darwin: mach-o, but wrong architecture"

[Jaime E Oliver]

Hi all, 

I have successfully compiled a GEM external in OS X using the latest gem from git and Pd 0.45-5. When I try to load this external I get that it finds it, but complains about the architecture:

[…]/Gem-master/extra/pix_demo/pix_demo.pd_darwin: mach-o, but wrong architecture
 pix_demo
... couldn't create

I assume I need to add a flag but not entirely sure which one or where to put it. 

Any suggestions?

best,

J