Undefined symbol errors when building add-ons for Archicad 25

[Anonymous]

I'm trying to build add-ons for Archicad 25 using Xcode. It builds all the files fine, but then comes up with 4 errors related to the RS module. The same add-on builds fine for previous versions of Archicad.
What am I doing wrong?
(I've included the Modules\RS folder in the User Header Search Paths field for the Xcode project. Without that it kicks up errors much earlier in the build process.)

[Viktor Kovacs · Accepted solution]

RS is a new module in Archicad 25. It's not enough to add it to the include search path, you also have to add it to the used libraries/frameworks list.

[Anonymous]

Thanks Viktor! That's exactly what I needed to do.
A typical rookie error ...