I've tried to 'make' on both Mac OS X 10.8.5 and 10.9.5. On 10.8.5 I get this
$ make
cd rowl0; make
as main.s -o main.o --32
FATAL:/usr/bin/../libexec/as/x86_64/as: I don't understand '-' flag!
make[1]: *** [main.o] Error 1
make: *** [all] Error 2
On 10.9.5 I get something similar.