From 9a13fcbf02e16bda1b8d30332c97ea9460306e4d Mon Sep 17 00:00:00 2001
From: Brad King <brad.king@kitware.com>
Date: Mon, 22 Dec 2014 18:34:28 -0500
Subject: [PATCH] Ninja: Do not crash when CMAKE_<LANG>_COMPILE_OBJECT is empty
 (#15325)

---
 Source/cmNinjaTargetGenerator.cxx | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/Source/cmNinjaTargetGenerator.cxx b/Source/cmNinjaTargetGenerator.cxx
index 816e6d827..b8cc5fbf8 100644
--- a/Source/cmNinjaTargetGenerator.cxx
+++ b/Source/cmNinjaTargetGenerator.cxx
@@ -454,7 +454,10 @@ cmNinjaTargetGenerator
   std::vector<std::string> compileCmds;
   cmSystemTools::ExpandListArgument(compileCmd, compileCmds);
 
-  compileCmds.front().insert(0, cldeps);
+  if (!compileCmds.empty())
+    {
+    compileCmds.front().insert(0, cldeps);
+    }
 
   for (std::vector<std::string>::iterator i = compileCmds.begin();
        i != compileCmds.end(); ++i)