Getting Chrono C++ library (Boost::sandbox) to work

i wanted to try out Chrono from the Boost sandbox. It seems to support a lot of stuff and should be stable.

I have Boost in version 1.44 installed on my system (incl. boost_system lib which is needed) and took the sandbox version (the download-version is older and misses for example the ratio.hpp file).

But it isn't compiling. Trying to compile the simple example from the documentation, with linking boost_system (in scons with LIBS=['boost_system']), the following error is occurring every time:

obj/main.o: In function `main':
/home/***/src/main.cpp:34: undefined reference to `boost::chrono::system_clock::now()'
scons: building terminated because of errors.

That seems to be a linker error. What did i do wrong? I have boost_system in version 1.44 linked (trough scons) and already tried the same with the older version 1.40.

Any tips? How did you setup your use of chrono?

Thanks.

sascha

Edit: This thread,开发者_如何学Go which is talking about compatibility issues, let me think that the sandbox version of Chrono should be able to work with boost 1.44.

---

As described in the Installing Chrono documentation, you either need to build and link the Chrono library, or define BOOST_CHRONO_INLINED.

I had problems building Chrono from the trunk checkout, but it's probably related to the type_traits incompatibility mentioned in the Chrono docs.

I was able to build the example program with the following SConstruct (after fixing namespace errors):

env = Environment(
    CPPDEFINES = ['BOOST_CHRONO_INLINED'],
    CPPPATH = ['/.../boost_1_44_0', ],
    LIBPATH = ['/.../boost_1_44_0/stage/lib', ],
    LIBS = ['boost_system'],
)

env.Program('chrono-test', 'main.cpp')