From 8ee9bbbd0ca5aab5bceb2dc9dda041e5745ffc19 Mon Sep 17 00:00:00 2001
From: Brad King <brad.king@kitware.com>
Date: Thu, 4 Aug 2011 15:35:59 -0400
Subject: [PATCH] Do not crash when an imported target depends on a missing
 target

Commit e01cce28 (Allow add_dependencies() on imported targets,
2010-11-19) forgot to check if the dependee exists before using it.
---
 Source/cmComputeTargetDepends.cxx | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/Source/cmComputeTargetDepends.cxx b/Source/cmComputeTargetDepends.cxx
index a4ca363a8..3a0ed0640 100644
--- a/Source/cmComputeTargetDepends.cxx
+++ b/Source/cmComputeTargetDepends.cxx
@@ -276,9 +276,11 @@ void cmComputeTargetDepends::AddTargetDepend(int depender_index,
     for(std::set<cmStdString>::const_iterator i = utils.begin();
         i != utils.end(); ++i)
       {
-      cmTarget* transitive_dependee =
-        dependee->GetMakefile()->FindTargetToUse(i->c_str());
-      this->AddTargetDepend(depender_index, transitive_dependee, false);
+      if(cmTarget* transitive_dependee =
+         dependee->GetMakefile()->FindTargetToUse(i->c_str()))
+        {
+        this->AddTargetDepend(depender_index, transitive_dependee, false);
+        }
       }
     }
   else