From f764e1fcb2b23e4fac5579dbfefa18404dcc95b5 Mon Sep 17 00:00:00 2001
From: Brad King <brad.king@kitware.com>
Date: Wed, 26 Nov 2003 16:38:26 -0500
Subject: [PATCH] ENH: Added undocumented cmake_symlink_library to help with
 building versioned shared libraries.

---
 Source/cmake.cxx | 28 +++++++++++++++++++++++++++-
 1 file changed, 27 insertions(+), 1 deletion(-)

diff --git a/Source/cmake.cxx b/Source/cmake.cxx
index cf713a969a..5a478d0690 100644
--- a/Source/cmake.cxx
+++ b/Source/cmake.cxx
@@ -715,7 +715,33 @@ int cmake::CMakeCommand(std::vector<std::string>& args)
         }        
 
       return 1;
-    }
+      }
+
+    // Internal CMake shared library support.
+    else if (args[1] == "cmake_symlink_library" && args.size() == 5)
+      {
+      int result = 0;
+      std::string realName = args[2];
+      std::string soName = args[3];
+      std::string name = args[4];
+      if(soName != realName)
+        {
+        std::string fname = cmSystemTools::GetFilenameName(realName);
+        if(!cmSystemTools::CreateSymlink(fname.c_str(), soName.c_str()))
+          {
+          result = 1;
+          }
+        }
+      if(name != soName)
+        {
+        std::string fname = cmSystemTools::GetFilenameName(soName);
+        if(!cmSystemTools::CreateSymlink(fname.c_str(), name.c_str()))
+          {
+          result = 1;
+          }
+        }
+      return 0;
+      }
 
 #if defined(_WIN32) && !defined(__CYGWIN__)
     // Write registry value