From 3a462fa6739563cb059299d6956b41f6a828612d Mon Sep 17 00:00:00 2001
From: Brad King <brad.king@kitware.com>
Date: Thu, 24 Jan 2008 07:37:15 -0500
Subject: [PATCH] ENH: Apply new implicit link directory find_library policy
 when loading a cache from an earlier CMake.

---
 Source/cmFindLibraryCommand.cxx | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/Source/cmFindLibraryCommand.cxx b/Source/cmFindLibraryCommand.cxx
index 1f9a9f478..34f476e56 100644
--- a/Source/cmFindLibraryCommand.cxx
+++ b/Source/cmFindLibraryCommand.cxx
@@ -86,6 +86,26 @@ bool cmFindLibraryCommand
                                          this->VariableDocumentation.c_str(),
                                          cmCacheManager::FILEPATH);
       }
+
+    // If the existing value was loaded from a cache written by CMake
+    // 2.4 or below then force the implicit link directory fix on the
+    // value.
+    if(this->Makefile->NeedCacheCompatibility(2, 4))
+      {
+      if(const char* v =
+         this->Makefile->GetDefinition(this->VariableName.c_str()))
+        {
+        std::string nv = this->FixForImplicitLocations(v);
+        if(nv != v)
+          {
+          this->Makefile
+            ->AddCacheDefinition(this->VariableName.c_str(),
+                                 nv.c_str(),
+                                 this->VariableDocumentation.c_str(),
+                                 cmCacheManager::FILEPATH);
+          }
+        }
+      }
     return true;
     }