From 31723effe7cd54b204bced62d3eeeba3f565e1df Mon Sep 17 00:00:00 2001
From: Andrey Kamaev <no@email>
Date: Mon, 7 May 2012 14:01:36 +0000
Subject: [PATCH] #1902 added workaround for CMake 2.8.2 bug

---
 cmake/OpenCVIOLibs.cmake | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/cmake/OpenCVIOLibs.cmake b/cmake/OpenCVIOLibs.cmake
index 621d00e528..8b0dd082ec 100644
--- a/cmake/OpenCVIOLibs.cmake
+++ b/cmake/OpenCVIOLibs.cmake
@@ -9,7 +9,11 @@ if(BUILD_ZLIB)
   unset_all(ZLIB_FOUND)
 else()
   include(FindZLIB)
-  if(ZLIB_FOUND AND NOT ZLIB_VERSION_STRING)
+  if(ZLIB_FOUND)
+    if(ZLIB_VERSION_STRING)
+      #cmake 2.8.2 bug - it fails to determine zlib version
+      unset(ZLIB_VERSION_STRING CACHE)
+    endif()
     ocv_parse_header2(ZLIB "${ZLIB_INCLUDE_DIR}/zlib.h" ZLIB_VERSION "")
   endif()
   if(ZLIB_FOUND AND ANDROID)