I had a bug with rviz (reported in my previous question) that was fixed in a newer version of rviz, I do: $ git clone (cant publish linkshttps)://github.com/ros-visualization/rviz.git -b groovy-devel and while catkinmake i get:

(...)
Linking CXX executable /home/user/old_rviz/devel/lib/rviz/rviz
/home/user/old_rviz/devel/lib/librviz.so: undefined reference to `YAML::detail::node_data::mark_defined()'
/home/user/old_rviz/devel/lib/librviz.so: undefined reference to `YAML::detail::memory::create_node()'
/home/user/old_rviz/devel/lib/librviz.so: undefined reference to `YAML::Load(std::basic_istream<char, std::char_traits<char> >&)'
/home/user/old_rviz/devel/lib/librviz.so: undefined reference to `YAML::detail::node_data::begin()'
/home/user/old_rviz/devel/lib/librviz.so: undefined reference to `YAML::detail::node_data::set_null()'
/home/user/old_rviz/devel/lib/librviz.so: undefined reference to `YAML::detail::node_data::end()'
/home/user/old_rviz/devel/lib/librviz.so: undefined reference to         `YAML::detail::memory_holder::merge(YAML::detail::memory_holder&)'
/home/user/old_rviz/devel/lib/librviz.so: undefined reference to `YAML::detail::node_data::empty_scalar'
collect2: ld returned 1 exit status
make[2]: *** [/home/user/old_rviz/devel/lib/rviz/rviz] Error 1
make[1]: *** [rviz/src/rviz/CMakeFiles/executable.dir/all] Error 2
make: *** [all] Error 2
make: INTERNAL: Exiting with 5 jobserver tokens available; should be 4!

I've tried to reinstall YAML but i crashed ROS so i had to reinstall it. Can some1 help? I don't know what i can do and I dont want to break ROS again.

//edit 1

I did: download yaml 0.5.1

mkdir build
cd build
cmake ..
sudo cmake --build . --config Release

but this did not help