Undefined reference to 'boost::system::generic_category()'?

Question

it seems that i am unable to see the obvious. I wanted to use some Boost library features for my project and know i am getting these nice errors all of a sudden:

Answer 1

The "system" lib is missing in the linking stage. My config is as follows and it fixes the error:

find_package(Boost 1.55.0 REQUIRED COMPONENTS system filesystem)

include_directories(... ${Boost_INCLUDE_DIRS})

link_directories(... ${Boost_LIBRARY_DIRS})

target_link_libraries(... ${Boost_LIBRARIES})

Note that using only

find_package(Boost 1.55.0 REQUIRED)

does not work as ${Boost_LIBRARIES} won't be available then.