---- OpenCV-2.3.1/CMakeLists.txt.orig 2011-09-20 11:49:54.179110367 +0200
-+++ OpenCV-2.3.1/CMakeLists.txt 2011-09-20 11:50:58.153269555 +0200
-@@ -1135,6 +1135,8 @@
- set(EXTRA_EXE_LINKER_FLAGS_RELEASE "")
- set(EXTRA_EXE_LINKER_FLAGS_DEBUG "")
+diff -ur OpenCV-2.4.2.orig//cmake/OpenCVCompilerOptions.cmake OpenCV-2.4.2/cmake/OpenCVCompilerOptions.cmake
+--- OpenCV-2.4.2.orig//cmake/OpenCVCompilerOptions.cmake 2012-07-09 23:40:12.980147858 +0000
++++ OpenCV-2.4.2/cmake/OpenCVCompilerOptions.cmake 2012-07-09 23:46:59.773180868 +0000
+@@ -47,6 +47,8 @@
+ endif()
+ endmacro()
-+set(EXTRA_C_FLAGS "${EXTRA_C_FLAGS} -D__STDC_CONSTANT_MACROS")
++add_extra_compiler_option(-D__STDC_CONSTANT_MACROS)
+
- if(MSVC)
- set(EXTRA_C_FLAGS "${EXTRA_C_FLAGS} /D _CRT_SECURE_NO_DEPRECATE /D _CRT_NONSTDC_NO_DEPRECATE /D _SCL_SECURE_NO_WARNINGS")
- # 64-bit portability warnings, in MSVC8
-@@ -1174,10 +1176,6 @@
- set(EXTRA_C_FLAGS "${EXTRA_C_FLAGS} -Werror")
- endif()
+ if(MINGW)
+ # http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40838
+ # here we are trying to workaround the problem
+@@ -105,10 +107,6 @@
+ add_extra_compiler_option(-Werror)
+ endif()
-- if(X86 AND NOT MINGW64 AND NOT X86_64 AND NOT APPLE)
-- set(EXTRA_C_FLAGS "${EXTRA_C_FLAGS} -march=i686")
-- endif()
+- if(X86 AND NOT MINGW64 AND NOT X86_64 AND NOT APPLE)
+- add_extra_compiler_option(-march=i686)
+- endif()
-
- # Other optimizations
- if(USE_OMIT_FRAME_POINTER)
- set(EXTRA_C_FLAGS_RELEASE "${EXTRA_C_FLAGS_RELEASE} -fomit-frame-pointer")
+ # Other optimizations
+ if(ENABLE_OMIT_FRAME_POINTER)
+ add_extra_compiler_option(-fomit-frame-pointer)
---- OpenCV-2.2.0/CMakeLists.txt~ 2010-12-07 11:47:33.354861668 +0100
-+++ OpenCV-2.2.0/CMakeLists.txt 2010-12-07 12:43:06.802865668 +0100
-@@ -429,6 +429,7 @@
- endif()
- if(WITH_V4L)
- CHECK_MODULE(libv4l1 HAVE_LIBV4L)
-+ CHECK_MODULE(libv4l2 HAVE_LIBV4L2)
- CHECK_INCLUDE_FILE(linux/videodev.h HAVE_CAMV4L)
- CHECK_INCLUDE_FILE(linux/videodev2.h HAVE_CAMV4L2)
- else()
+diff -ur OpenCV-2.4.2.orig//cmake/OpenCVFindLibsVideo.cmake OpenCV-2.4.2/cmake/OpenCVFindLibsVideo.cmake
+--- OpenCV-2.4.2.orig//cmake/OpenCVFindLibsVideo.cmake 2012-07-09 23:47:24.910117311 +0000
++++ OpenCV-2.4.2/cmake/OpenCVFindLibsVideo.cmake 2012-07-09 23:48:25.689181021 +0000
+@@ -75,6 +75,7 @@
+ ocv_clear_vars(HAVE_LIBV4L HAVE_CAMV4L HAVE_CAMV4L2)
+ if(WITH_V4L)
+ CHECK_MODULE(libv4l1 HAVE_LIBV4L)
++ CHECK_MODULE(libv4l2 HAVE_LIBV4L2)
+ CHECK_INCLUDE_FILE(linux/videodev.h HAVE_CAMV4L)
+ CHECK_INCLUDE_FILE(linux/videodev2.h HAVE_CAMV4L2)
+ endif(WITH_V4L)