clang-ocaml make: Error: Unbound value Clang_ast_j.read_decl

[elijah-z142]

When running make -C clang-ocaml:

ocamlfind ocamlopt -package unix,atdgen,atdgen-runtime,camlzip -I build -safe-string -o build/clang_ast_converter.cmx -c clang_ast_converter.ml
File "clang_ast_converter.ml", line 11, characters 41-62:
Error: Unbound value Clang_ast_j.read_decl
make: *** [Makefile:42: build/clang_ast_converter.cmx] Error 2

I am using Fedora Linux 28
ocaml --version
4.06.0
opam --version
2.0.0~rc

On Mac OS X (mohave + macports) there is a slightly different error:

Elijahs-Mac-Pro:facebook-clang-plugins elijah$ make -C clang-ocaml/
ocamlfind ocamlopt -package unix,atdgen,atdgen-runtime,camlzip -I build -safe-string -o build/clang_ast_t.cmi -c build/clang_ast_t.mli
File "build/clang_ast_t.mli", line 29, characters 0-4:
Error: Syntax error
make: *** [build/clang_ast_t.cmi] Error 2

I would try with HomeBrew, but versions 4.05.0/2.0.0 look to be the latest for OCAML and OPAM.

[elijah-z142]

Cache issue. Fixed with "make -C clang-ocaml clean".