added libarchive to the cmake file

CMakeLists.txt

@@ -66,6 +66,13 @@ if(${OpenCV_VERSION} VERSION_LESS 2.3.1)
 	message(FATAL_ERROR "OpenCV version is not compatible: ${OpenCV_VERSION}")
 endif()
 
+find_package(LibArchive REQUIRED)
+message(STATUS "LibArchive library status:")
+message(STATUS "    version: ${LibArchive_VERSION}")
+message(STATUS "    libraries: ${LibArchive_LIBRARIES}")
+message(STATUS "    include path: ${LibArchive_VERSION}")
+
+
 if(BGS_PYTHON_SUPPORT)
 	set(Boost_USE_STATIC_LIBS OFF)
 	set(Boost_USE_MULTITHREADED ON)
@@ -134,7 +141,7 @@ add_executable(bgs_demo ${demo})
 target_link_libraries(bgs_demo ${OpenCV_LIBS} libbgs)
 
 add_executable(bgs_demo2 ${demo2})
-target_link_libraries(bgs_demo2 ${OpenCV_LIBS} libbgs)
+target_link_libraries(bgs_demo2 ${OpenCV_LIBS} ${LibArchive_LIBRARIES} libbgs)
 
 install(TARGETS libbgs
 	bgslibrary