From b0fc7e3f40c75c6f9dc729be8bb1b0a28e65e6bd Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Wed, 19 Jul 2017 19:30:59 +0200
Subject: Warn if compiler does not support modules

---
 build/root.build | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'build')

diff --git a/build/root.build b/build/root.build
index cfbcda9..9f670f8 100644
--- a/build/root.build
+++ b/build/root.build
@@ -6,7 +6,8 @@ cxx.std = experimental
 
 using cxx
 
-#assert $cxx.features.modules 'c++ compiler does not support modules'
+if! $cxx.features.modules
+  warn 'c++ compiler does not support modules'
 
 mxx{*}: extension = mxx
 cxx{*}: extension = cxx
-- 
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