From e0a662a3ddfe3c906f81b0a070e4de169e46646e Mon Sep 17 00:00:00 2001
From: Brad King <brad.king@kitware.com>
Date: Thu, 5 Oct 2006 16:30:47 -0400
Subject: [PATCH] ENH: Adding version number to the name of a DLL built in
 cygwin but not the import library.  This addresses bug#3571.

---
 Modules/Platform/CYGWIN.cmake |  3 +++
 Source/cmTarget.cxx           | 11 +++++++++++
 2 files changed, 14 insertions(+)

diff --git a/Modules/Platform/CYGWIN.cmake b/Modules/Platform/CYGWIN.cmake
index 0d508f00b..fe34bfc56 100644
--- a/Modules/Platform/CYGWIN.cmake
+++ b/Modules/Platform/CYGWIN.cmake
@@ -28,6 +28,9 @@ SET(CMAKE_C_CREATE_SHARED_LIBRARY
 SET(CMAKE_CXX_CREATE_SHARED_LIBRARY
   "<CMAKE_CXX_COMPILER> <LANGUAGE_COMPILE_FLAGS> <CMAKE_SHARED_LIBRARY_CXX_FLAGS> <LINK_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_CXX_FLAGS> -o <TARGET> -Wl,--out-implib,<TARGET_IMPLIB> <OBJECTS> <LINK_LIBRARIES>")
 
+# Shared libraries on cygwin can be named with their version number.
+SET(CMAKE_SHARED_LIBRARY_NAME_WITH_VERSION 1)
+
 # Initialize C link type selection flags.  These flags are used when
 # building a shared library, shared module, or executable that links
 # to other libraries to select whether to use the static or shared
diff --git a/Source/cmTarget.cxx b/Source/cmTarget.cxx
index 24e196a9d..9ac85eead 100644
--- a/Source/cmTarget.cxx
+++ b/Source/cmTarget.cxx
@@ -1255,6 +1255,17 @@ void cmTarget::GetFullNameInternal(TargetType type,
   // Append the per-configuration postfix.
   outBase += configPostfix?configPostfix:"";
 
+  // Name shared libraries with their version number on some platforms.
+  if(const char* version = this->GetProperty("VERSION"))
+    {
+    if(type == cmTarget::SHARED_LIBRARY && !implib &&
+       this->Makefile->IsOn("CMAKE_SHARED_LIBRARY_NAME_WITH_VERSION"))
+      {
+      outBase += "-";
+      outBase += version;
+      }
+    }
+
   // Append the suffix.
   outSuffix = targetSuffix?targetSuffix:"";
 }