cmake HAVE_FILESYSTEM examples

apennisi/jpdaf_tracking CMakeLists.txt :19 

check_include_file_cxx(filesystem HAVE_FILESYSTEM)

apennisi/jpdaf_tracking CMakeLists.txt :21 

add_definitions(-DHAVE_FILESYSTEM)

apennisi/jpdaf_tracking CMakeLists.txt :23 

else(HAVE_FILESYSTEM)

apennisi/jpdaf_tracking CMakeLists.txt :25 

endif(HAVE_FILESYSTEM)