From 6434d616da5d75577d142e20e0f9fa430bd625df Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Thu, 18 Jun 2015 11:41:46 +0200
Subject: Use optional from libbutl

---
 build/cxx/rule.cxx | 1 +
 1 file changed, 1 insertion(+)

(limited to 'build/cxx')

diff --git a/build/cxx/rule.cxx b/build/cxx/rule.cxx
index f05370d..095c98a 100644
--- a/build/cxx/rule.cxx
+++ b/build/cxx/rule.cxx
@@ -12,6 +12,7 @@
 
 #include <butl/process>
 #include <butl/fdstream>
+#include <butl/optional>
 
 #include <build/scope>
 #include <build/variable>
-- 
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