From 9043add656177eeac1491a73d2f3ab92bec0013c Mon Sep 17 00:00:00 2001
From: Benjamin Barenblat <bbaren@debian.org>
Date: Sat, 29 Dec 2018 14:31:27 -0500
Subject: Imported Upstream version 8.8.2

---
 tools/coqdoc/cdglobals.ml | 34 +++++++++++++++++-----------------
 1 file changed, 17 insertions(+), 17 deletions(-)

(limited to 'tools/coqdoc/cdglobals.ml')

diff --git a/tools/coqdoc/cdglobals.ml b/tools/coqdoc/cdglobals.ml
index 5d48473d..0d3fb775 100644
--- a/tools/coqdoc/cdglobals.ml
+++ b/tools/coqdoc/cdglobals.ml
@@ -1,9 +1,11 @@
 (************************************************************************)
-(*  v      *   The Coq Proof Assistant  /  The Coq Development Team     *)
-(* <O___,, *   INRIA - CNRS - LIX - LRI - PPS - Copyright 1999-2016     *)
+(*         *   The Coq Proof Assistant / The Coq Development Team       *)
+(*  v      *   INRIA, CNRS and contributors - Copyright 1999-2018       *)
+(* <O___,, *       (see CREDITS file for the list of authors)           *)
 (*   \VV/  **************************************************************)
-(*    //   *      This file is distributed under the terms of the       *)
-(*         *       GNU Lesser General Public License Version 2.1        *)
+(*    //   *    This file is distributed under the terms of the         *)
+(*         *     GNU Lesser General Public License Version 2.1          *)
+(*         *     (see LICENSE file for the text of the license)         *)
 (************************************************************************)
 
 
@@ -70,23 +72,21 @@ let normalize_filename f =
   let dirname = Filename.dirname f in
   normalize_path dirname, basename
 
+(** Add a local installation suffix (unless the suffix is itself
+    absolute in which case the prefix does not matter) *)
+let use_suffix prefix suffix =
+  if String.length suffix > 0 && suffix.[0] = '/' then suffix else prefix / suffix
+
 (** A weaker analog of the function in Envars *)
 
 let guess_coqlib () =
   let file = "theories/Init/Prelude.vo" in
-  match Coq_config.coqlib with
-    | Some coqlib when Sys.file_exists (coqlib / file) -> coqlib
-    | Some _ | None ->
-      let coqbin = normalize_path (Filename.dirname Sys.executable_name) in
-      let prefix = Filename.dirname coqbin in
-      let rpath =
-        if Coq_config.local then []
-        else if Coq_config.arch_is_win32 then ["lib"]
-        else ["lib/coq"]
-      in
-      let coqlib = List.fold_left (/) prefix rpath in
-      if Sys.file_exists (coqlib / file) then coqlib
-      else prefix
+  let coqbin = normalize_path (Filename.dirname Sys.executable_name) in
+  let prefix = Filename.dirname coqbin in
+  let coqlib = use_suffix prefix Coq_config.coqlibsuffix in
+  if Sys.file_exists (coqlib / file) then coqlib else
+  if not Coq_config.local && Sys.file_exists (Coq_config.coqlib / file)
+  then Coq_config.coqlib else prefix
 
 let header_trailer = ref true
 let header_file = ref ""
-- 
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