From ade763571a19b5e222ac626a6b3bc10685e542a1 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Fri, 21 Jul 2017 20:30:48 +0200
Subject: Use binary mode when pre-parsing translation unit

Failed that, the module export position we obtain cannot be reliably seeked
to.
---
 build2/cc/compile.cxx | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/build2/cc/compile.cxx b/build2/cc/compile.cxx
index 681cfc9..76be8e6 100644
--- a/build2/cc/compile.cxx
+++ b/build2/cc/compile.cxx
@@ -2431,8 +2431,9 @@ namespace build2
                           env.empty () ? nullptr : env.data ());
           }
 
-          ifdstream is (move (pr.in_ofd),
-                        fdstream_mode::text | fdstream_mode::skip);
+          // Use binary mode to obtain consistent positions.
+          //
+          ifdstream is (move (pr.in_ofd), fdstream_mode::skip);
 
           parser p;
           translation_unit tu (p.parse (is, rels));
-- 
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