Linker.c doesn't build on OS X due to signedness mismatch
rts/Linker.c:6978:59: error:
error: assigning to 'unsigned char *' from 'char *' converts between pointers to integer types with different sign [-Werror,-Wpointer-sign]
oc->symbols[curSymbol].addr = addr;
^ ~~~~
Apparently introduced by 90538d86.