From f212615d3e799edc57128bccdc501120d753c6ee Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Peter=20K=C3=BCmmel?= <syntheticpp@gmx.net>
Date: Mon, 4 Nov 2013 13:18:47 +0100
Subject: [PATCH] Ninja: don't parse empty string

---
 Source/cmNinjaTargetGenerator.cxx | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/Source/cmNinjaTargetGenerator.cxx b/Source/cmNinjaTargetGenerator.cxx
index a6f8159c8..26eadbe52 100644
--- a/Source/cmNinjaTargetGenerator.cxx
+++ b/Source/cmNinjaTargetGenerator.cxx
@@ -398,11 +398,14 @@ cmNinjaTargetGenerator
     depfile = "$DEP_FILE";
     const std::string flagsName = "CMAKE_DEPFILE_FLAGS_" + lang;
     std::string depfileFlags = mf->GetSafeDefinition(flagsName.c_str());
-    cmSystemTools::ReplaceString(depfileFlags, "<DEPFILE>", "$DEP_FILE");
-    cmSystemTools::ReplaceString(depfileFlags, "<OBJECT>",  "$out");
-    cmSystemTools::ReplaceString(depfileFlags, "<CMAKE_C_COMPILER>",
-                                 mf->GetDefinition("CMAKE_C_COMPILER"));
-    flags += " " + depfileFlags;
+    if (!depfileFlags.empty())
+      {
+      cmSystemTools::ReplaceString(depfileFlags, "<DEPFILE>", "$DEP_FILE");
+      cmSystemTools::ReplaceString(depfileFlags, "<OBJECT>",  "$out");
+      cmSystemTools::ReplaceString(depfileFlags, "<CMAKE_C_COMPILER>",
+                                   mf->GetDefinition("CMAKE_C_COMPILER"));
+      flags += " " + depfileFlags;
+      }
     }
 
   vars.Flags = flags.c_str();