Error trying to build app.c

[shossa3]

I get the following errors when trying to build app.c. I am including the app_defs.h and app.h header files. Not sure what's going on. Does anyone have any suggestions?

"_hal_plot_led", referenced from:

  _app_surface_event in app.o

  _app_cable_event in app.o

  _app_init in app.o

"_hal_read_flash", referenced from:

  _app_init in app.o

"_hal_send_midi", referenced from:

  _app_surface_event in app.o

  _app_midi_event in app.o

  _app_aftertouch_event in app.o

  _app_timer_event in app.o

"_hal_write_flash", referenced from:

  _app_surface_event in app.o

"_main", referenced from:

 implicit entry/start for main executable

ld: symbol(s) not found for architecture x86_64

clang: error: linker command failed with exit code 1 (use -v to see invocation)

[dvhdr]

This ought to be fixed now (you were building the macOS project, right?)