[Discuss-gnuradio] build error

[??????????????]

hi,

when i install a new block ,try "make",i got these errors:

CMakeFiles/test-scramble.dir/test_scramble.cc.o: In function `boost::filesystem::operator/(boost::filesystem::path const&, boost::filesystem::path const&)':

test_scramble.cc:(.text._ZN5boost10filesystemdvERKNS0_4pathES3_[boost::filesystem::operator/(boost::filesystem::path const&, boost::filesystem::path const&)]+0x29): undefined reference to `boost::filesystem::path::operator/=(boost::filesystem::path const&)'

CMakeFiles/test-scramble.dir/test_scramble.cc.o: In function `main':

test_scramble.cc:(.text.startup+0x8a): undefined reference to `boost::filesystem::detail::current_path(boost::system::error_code*)'

test_scramble.cc:(.text.startup+0xdc): undefined reference to `boost::filesystem::detail::status(boost::filesystem::path const&, boost::system::error_code*)'

test_scramble.cc:(.text.startup+0xf8): undefined reference to `boost::filesystem::detail::create_directory(boost::filesystem::path const&, boost::system::error_code*)'

what does this mean?how to solve it?

BZS