From b10199ab328848e954c3701f745043ff697a2c27 Mon Sep 17 00:00:00 2001
From: Andreas Kling <andreas.kling@nokia.com>
Date: Tue, 22 Mar 2011 16:22:34 +0100
Subject: ReplaceExtraCompilerCacheKey: Don't recreate "::" QString on each
 call.

Reviewed-by: Marius Storm-Olsen
---
 qmake/generators/makefile.cpp | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/qmake/generators/makefile.cpp b/qmake/generators/makefile.cpp
index 7963976..9e2be31 100644
--- a/qmake/generators/makefile.cpp
+++ b/qmake/generators/makefile.cpp
@@ -1485,18 +1485,20 @@ MakefileGenerator::createObjectList(const QStringList &sources)
 
 ReplaceExtraCompilerCacheKey::ReplaceExtraCompilerCacheKey(const QString &v, const QStringList &i, const QStringList &o)
 {
+    static QString doubleColon = QLatin1String("::");
+
     hash = 0;
     pwd = qmake_getpwd();
     var = v;
     {
         QStringList il = i;
         il.sort();
-        in = il.join("::");
+        in = il.join(doubleColon);
     }
     {
         QStringList ol = o;
         ol.sort();
-        out = ol.join("::");
+        out = ol.join(doubleColon);
     }
 }
 
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