I can't recall where we use ocamlgraph

src/_tags

@@ -2,9 +2,9 @@
 "backends/Horn": include
 <**/.svn>: -traverse
 <**/.svn>: not_hygienic
-"main_lustre_compiler.native": package(ocamlgraph)
+#"main_lustre_compiler.native": package(ocamlgraph)
 "main_lustre_compiler.native": use_str
 "main_lustre_compiler.native": use_unix
-<*.ml{,i}>: package(ocamlgraph)
+#<*.ml{,i}>: package(ocamlgraph)
 <*.ml{,i}>: use_str
 <*.ml{,i}>: use_unix