From 7bfc50b84debe6ce7718832944f20098196f56cc Mon Sep 17 00:00:00 2001
From: Andrey Kamaev <no@email>
Date: Thu, 26 Apr 2012 21:40:34 +0000
Subject: [PATCH] #1854 Fixed Mac OS X build with Clang

---
 cmake/OpenCVDetectCXXCompiler.cmake | 15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)

diff --git a/cmake/OpenCVDetectCXXCompiler.cmake b/cmake/OpenCVDetectCXXCompiler.cmake
index f429455..091e6f7 100644
--- a/cmake/OpenCVDetectCXXCompiler.cmake
+++ b/cmake/OpenCVDetectCXXCompiler.cmake
@@ -5,12 +5,15 @@ if(CMAKE_CL_64)
     set(MSVC64 1)
 endif()
 
-if(CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
-  set(CMAKE_COMPILER_IS_GNUCXX 1)
-endif()
-
-if(CMAKE_C_COMPILER_ID STREQUAL "Clang")
-  set(CMAKE_COMPILER_IS_GNUC 1) 
+if(NOT APPLE)
+  if(CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
+    set(CMAKE_COMPILER_IS_GNUCXX 1)
+    unset(ENABLE_PRECOMPILED_HEADERS CACHE)
+  endif()
+  if(CMAKE_C_COMPILER_ID STREQUAL "Clang")
+    set(CMAKE_COMPILER_IS_GNUC 1)
+    unset(ENABLE_PRECOMPILED_HEADERS CACHE)
+  endif()
 endif()
 
 # ----------------------------------------------------------------------------
-- 
2.7.4