commit 4473822b5aa6de3e849ca6c958b365a71edbca4f
Author: Benjamin Pierce <bcpierce00@gmail.com>
Date:   Sat May 14 11:28:49 2016 -0400

    Fix build for OCaml 4.03.0

diff --git a/src/system/system_generic.ml b/src/system/system_generic.ml
index 22b5b6c..b9a4cef 100755
--- a/src/system/system_generic.ml
+++ b/src/system/system_generic.ml
@@ -57,7 +57,8 @@ let opendir f =
 let readdir = Unix.readdir
 let closedir = Unix.closedir
 let readlink = Unix.readlink
-let symlink = Unix.symlink
+(* BCP 5/16: Eta-expand for backward compatibility with OCaml <=4.02 *)
+let symlink s1 s2 = Unix.symlink s1 s2
 let chdir = Sys.chdir
 let getcwd = Sys.getcwd