ocaml*: add ocamlopt and ocamlfind and extend ocamlc (#4436)

pages/common/ocamlfind.md

@@ -0,0 +1,17 @@
+# ocamlfind
+
+> The findlib package manager for OCaml.
+> Simplifies linking executables with external libraries.
+> More information: <http://projects.camlcity.org/projects/findlib.html>.
+
+- Compile a source file to a native binary and link with packages:
+
+`ocamlfind ocamlopt -package {{package1}},{{package2}} -linkpkg -o {{executable}} {{source_file.ml}}`
+
+- Compile a source file to a bytecode binary and link with packages:
+
+`ocamlfind ocamlc -package {{package1}},{{package2}} -linkpkg -o {{executable}} {{source_file.ml}}`
+
+- Cross-compile for a different platform:
+
+`ocamlfind -toolchain {{cross-toolchain}} ocamlopt -o {{executable}} {{source_file.ml}}`