objc/NuBridge.m:1242:6: error: implicit declaration of function
'ffi_prep_closure' is invalid in C99
[-Werror,-Wimplicit-function-declaration]
if (ffi_prep_closure(closure, cif, objc_calling_nu_method_handle...
^
1 error generated.
make: *** [objc/NuBridge.o] Error 1
Nu builds fail on ARM-based Macs:
This appears to be already fixed for iOS.