new file mode 100644
--- /dev/null
+++ b/runtime/compiler/ocaml.vim
@@ -0,0 +1,44 @@
+" Vim Compiler File
+" Compiler:	ocaml
+" Maintainer:	See ftplugin/ocaml.vim (?)
+" Last Change:	June 2013 by Marc Weber
+"
+" Marc Weber's comments:
+" Setting makeprg doesn't make sense, because there is ocamlc, ocamlopt,
+" ocamake and whatnot. So which one to use?
+"
+" This error format was moved from ftplugin/ocaml.vim to this file,
+" because ftplugin is the wrong file to set an error format
+" and the error format itself is annoying because it joins many lines in this
+" error case:
+"
+"    Error: The implementation foo.ml does not match the interface foo.cmi:
+"    Modules do not match case.
+"
+" So having it here makes people opt-in
+
+
+if exists("current_compiler")
+    finish
+endif
+let current_compiler = "ocaml"
+
+let s:cpo_save = &cpo
+set cpo&vim
+
+CompilerSet errorformat =
+      \%EFile\ \"%f\"\\,\ line\ %l\\,\ characters\ %c-%*\\d:,
+      \%EFile\ \"%f\"\\,\ line\ %l\\,\ character\ %c:%m,
+      \%+EReference\ to\ unbound\ regexp\ name\ %m,
+      \%Eocamlyacc:\ e\ -\ line\ %l\ of\ \"%f\"\\,\ %m,
+      \%Wocamlyacc:\ w\ -\ %m,
+      \%-Zmake%.%#,
+      \%C%m,
+      \%D%*\\a[%*\\d]:\ Entering\ directory\ `%f',
+      \%X%*\\a[%*\\d]:\ Leaving\ directory\ `%f',
+      \%D%*\\a:\ Entering\ directory\ `%f',
+      \%X%*\\a:\ Leaving\ directory\ `%f',
+      \%DMaking\ %*\\a\ in\ %f
+
+let &cpo = s:cpo_save
+unlet s:cpo_save