diff --git a/CMakeLists.txt b/CMakeLists.txt
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+# cmake file examples
+# https://code.google.com/p/opencv-feature-tracker/source/browse/CMakeLists.txt?r=f804b03e704147e65183c19a50f57abedb22f45c
+
+
+# TODO:
+# cmake clean... orz
+# http://stackoverflow.com/questions/9680420/looking-for-a-cmake-clean-command-to-clear-up-cmake-output
+
+
+cmake_minimum_required(VERSION 2.8)
+project(libr3)
+
+SET(CMAKE_MODULE_PATH
+    ${PROJECT_SOURCE_DIR}/cmake_modules
+    ${CMAKE_MODULE_PATH}
+    )
+
+include_directories(. ${INCLUDE_DIRECTORIES} /opt/local/include)
+link_directories(${LINK_DIRECTORIES} /opt/local/lib)
+
+
+# include_directories(${INCLUDE_DIRECTORIES} ${OPENCV_INCLUDE_DIR})
+
+# find_package(OpenCV REQUIRED)
+
+# set(Boost_USE_STATIC_LIBS ON)
+# set(Boost_USE_MULTITHREADED ON)
+# set(Boost_USE_STATIC_RUNTIME OFF)
+# find_package(Boost 1.55.0 COMPONENTS program_options filesystem regex)
+# find_package(GFlags REQUIRED)
+# find_package(GLog REQUIRED)
+# find_package(Gearman REQUIRED)
+# find_package(JsonCpp REQUIRED)
+find_package(PCRE REQUIRED)
+find_package(Judy REQUIRED)
+
+set(LIBS ${LIBS} ${PCRE_LIBRARIES} ${Judy_LIBRARIES} libr2)
+
+# find_package(opencv)
+
+# include_directories(${INCLUDE_DIRECTORIES} ${opencv_INCLUDE_DIRS})
+# link_directories(${LINK_DIRECTORIES} ${opencv_LIBRARY_DIRS})
+
+# set (CMAKE_CXX_FLAGS "-std=c++0x -arch x86_64 -stdlib=libc++ -g3 -Wall -O0")
+enable_testing()
+# set (CMAKE_CXX_FLAGS "-std=c++0x -arch x86_64 -stdlib=libc++ -g3 -Wall -O0")
+
+# add_subdirectory(src)
+add_subdirectory(tests)
+
+add_test(test_tree ${CMAKE_CURRENT_BINARY_DIR}/test_tree)
+add_library(libr2 main.c)
+
+# add_executable(alphablue-gui main.cc cv.cc)
+# target_link_libraries(alphablue-gui ${OpenCV_LIBS} ${GFlags_LIBS} ${GLog_LIBS} ${Boost_LIBS})
+# install(TARGETS alphablue-gui DESTINATION bin)
+
+# add_executable(alphablue-worker worker.cc cv.cc)
+# target_link_libraries(alphablue-worker ${OpenCV_LIBS} ${GFlags_LIBS} ${GLog_LIBS} ${Boost_LIBRARIES} ${Gearman_LIBS} ${JsonCpp_LIBS})
+# install(TARGETS alphablue-worker DESTINATION bin)
+
+# add_executable(wc_worker wc_worker.cc)
+# target_link_libraries(wc_worker ${OpenCV_LIBS} ${GFlags_LIBS} ${GLog_LIBS} ${Boost_LIBRARIES} ${Gearman_LIBS})
+# install(TARGETS wc_worker DESTINATION bin)