Unbound module Yojson.Basic.Util - makefile

Question

I try opening Yojson.Basic.Util in one of my files and keep getting an unbound module error. I've tried several different things and can't seem to figure out what's wrong
I have this in my .ocamlinit:
#require "yojson";;
#require "ANSITerminal";;
and this in my makefile:
test:
ocamlbuild -pkg yojson, oUnit test.byte && ./test.byte
play:
ocamlbuild -pkgs oUnit,yojson,str,ANSITerminal main.byte && ./main.byte
check:
bash checkenv.sh
clean:
ocamlbuild -clean
Typing make produces this error:
ocamlbuild -pkg yojson, oUnit test.byte && ./test.byte
ocamlfind: Package `yojson,' not found
Cannot run Ocamlfind.
make: *** [test] Error 2
Changing the makefile to:
test:
ocamlbuild -use-ocamlfind -pkg yojson, oUnit test.byte && ./test.byte
play:
ocamlbuild -pkgs oUnit,yojson,str,ANSITerminal main.byte && ./main.byte
check:
bash checkenv.sh
clean:
ocamlbuild -clean
I type in make and it gives me this error:
ocamlbuild -use-ocamlfind -pkg yojson, oUnit test.byte && ./test.byte
Solver failed:
Ocamlbuild knows of no rules that apply to a target named oUnit. This can happen if you ask Ocamlbuild to build a target with the wrong extension (e.g. .opt instead of .native) or if the source files live in directories that have not been specified as include directories.
Compilation unsuccessful after building 0 targets (0 cached) in 00:00:00.
make: *** [test] Error 6

Answer 1

There is a difference between the -pkg and -pkgs option for ocamlbuild. The -pkg option takes exactly one package name. The -pkgs option takes a list of comma-separated package names (there can be optional spaces before and after the commas, but then you have to quote the argument).
In your example, you use -pkg, but with a comma-separated list of arguments, and that list has a space, so it would have to be quoted. Using -pkgs yojson,oUnit should fix the issue.