ld: library not found for -lbigarray

I got this building unison on OSX Catalina. You need to add a symlink for now...

cd to where ever your ocaml lib is...

cd /usr/local/lib/ocaml/

create a symlink...

ln -s  bigarray.a libbigarray.a

From: https://github.com/bcpierce00/unison/issues/282