Undefined symbols for architecture x86_64:

[banslug2001@…]

I am trying to use boost chromo library inside Mac Xcode 7.1.1. I am able to compile header only project and I have been able to use the regex library. But with the chrono library I receive the falling error:

Undefined symbols for architecture x86_64:

"boost::system::system_category()", referenced from:

_cxx_global_var_init2 in main.o

"boost::system::generic_category()", referenced from:

_cxx_global_var_init in main.o _cxx_global_var_init1 in main.o

ld: symbol(s) not found for architecture x86_64 clang: error: linker command failed with exit code 1 (use -v to see invocation)

[banslug2001@…]

main.cpp

[John Maddock]

Are you linking to libboost_system?