unorthodox build setup?

[Ryan Schmidt]

> On Oct 5, 2018, at 16:18, Mark Brethen <mark.brethen at gmail.com> wrote:
> 
> libreduce.so: $(OBJ)
> 	rm -f libreduce.so
> 	gcc $(FAT) -shared $(OBJ) -o libreduce.so


On this gcc line is where

-install_name /opt/local/lib/libreduce.so

needs to appear.