Fix lookup of native files when option -R is missing.

Testcase:
mkdir a
echo "Definition t := O." > a/a.v
coqc -R a a a/a.v
echo "Require Import a.a. Definition u := t." > b.v
coqc -I . b.v
rm -rf a b.*

1 files changed, 8 insertions, 0 deletions

diff --git a/library/loadpath.ml b/library/loadpath.ml
index 60799a8a7..7c203bc88 100644
--- a/library/loadpath.ml
+++ b/library/loadpath.ml
@@ -22,6 +22,9 @@ type t = {
 
 let load_paths = Summary.ref ([] : t list) ~name:"LOADPATHS"
 
+let accessible_paths =
+  Summary.ref ([] : CUnix.physical_path list) ~name:"ACCPATHS"
+
 let logical p = p.path_logical
 
 let physical p = p.path_physical
@@ -30,6 +33,8 @@ let get_load_paths () = !load_paths
 
 let get_paths () = List.map physical !load_paths
 
+let get_accessible_paths () = !accessible_paths
+
 let anomaly_too_many_paths path =
   anomaly (str "Several logical paths are associated to" ++ spc () ++ str path)
 
@@ -63,6 +68,9 @@ let add_load_path phys_path isroot coq_path =
   match List.filter filter !load_paths with
   | [] ->
     load_paths := binding :: !load_paths;
+    if isroot then
+      accessible_paths := List.fold_left (fun acc v -> (fst v) :: acc)
+	(phys_path :: !accessible_paths) (System.all_subdirs phys_path)
   | [p] ->
     let dir = p.path_logical in
     if not (DirPath.equal coq_path dir)