From 9ebf44d84754adc5b64fcf612c6816c02c80462d Mon Sep 17 00:00:00 2001
From: Benjamin Barenblat <bbaren@debian.org>
Date: Sat, 2 Feb 2019 19:29:23 -0500
Subject: Imported Upstream version 8.9.0

---
 lib/envars.ml | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'lib/envars.ml')

diff --git a/lib/envars.ml b/lib/envars.ml
index be82bfe9..3ee0c710 100644
--- a/lib/envars.ml
+++ b/lib/envars.ml
@@ -110,6 +110,7 @@ let check_file_else ~dir ~file oth =
   if Sys.file_exists (path / file) then path else oth ()
 
 let guess_coqlib fail =
+  getenv_else "COQLIB" (fun () ->
   let prelude = "theories/Init/Prelude.vo" in
   check_file_else ~dir:Coq_config.coqlibsuffix ~file:prelude
     (fun () ->
@@ -117,6 +118,7 @@ let guess_coqlib fail =
       then Coq_config.coqlib
       else
         fail "cannot guess a path for Coq libraries; please use -coqlib option")
+  )
 
 (** coqlib is now computed once during coqtop initialization *)
 
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