From 659535a1792527d885f5de68afd84d4241fcb0b3 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Tue, 23 Aug 2016 09:12:14 +0200
Subject: Don't write trailing spaces in case of empty values in config.build

---
 build2/config/operation.cxx | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

(limited to 'build2/config')

diff --git a/build2/config/operation.cxx b/build2/config/operation.cxx
index ca2d559..90c2bbb 100644
--- a/build2/config/operation.cxx
+++ b/build2/config/operation.cxx
@@ -252,9 +252,18 @@ namespace build2
             if (v)
             {
               storage.clear ();
+              names_view ns (reverse (v, storage));
+
+              ofs << n;
+
+              if (ns.empty ())
+                ofs << " =";
+              else
+              {
+                ofs << " = ";
+                to_stream (ofs, ns, true, '@'); // Quote.
+              }
 
-              ofs << n << " = ";
-              to_stream (ofs, reverse (v, storage), true, '@'); // Quote.
               ofs << endl;
             }
             else
-- 
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