diff -ruN OpenCV-2.4.2.orig/cmake/OpenCVCompilerOptions.cmake OpenCV-2.4.2/cmake/OpenCVCompilerOptions.cmake
--- OpenCV-2.4.2.orig/cmake/OpenCVCompilerOptions.cmake	2012-06-29 00:55:15.000000000 +0200
+++ OpenCV-2.4.2/cmake/OpenCVCompilerOptions.cmake	2012-07-16 23:51:24.244907235 +0200
@@ -110,17 +110,6 @@
   endif()
 
   # Other optimizations
-  if(ENABLE_OMIT_FRAME_POINTER)
-    add_extra_compiler_option(-fomit-frame-pointer)
-  else()
-    add_extra_compiler_option(-fno-omit-frame-pointer)
-  endif()
-  if(ENABLE_FAST_MATH)
-    add_extra_compiler_option(-ffast-math)
-  endif()
-  if(ENABLE_POWERPC)
-    add_extra_compiler_option("-mcpu=G3 -mtune=G5")
-  endif()
   if(ENABLE_SSE)
     add_extra_compiler_option(-msse)
   endif()