On 01/25/2013 05:12 PM, Jeffrey Grasty wrote: > Hi, > > I am trying to measure the execution time of a for loop in a block and am > trying to use boost::chrono class to do it. However, when I build the > block I get: > > Scanning dependencies of target gnuradio-modtest > [ 5%] Building CXX object > lib/CMakeFiles/gnuradio-modtest.dir/passthrough_impl.cc.o > Linking CXX shared library libgnuradio-modtest.dylib > Undefined symbols for architecture x86_64: > "boost::chrono::steady_clock::now()", referenced from: > virtual thunk to gr::modtest::passthrough_impl::work(int, > std::vector<void const*, std::allocator<void const*> >&, std::vector<void*, > std::allocator<void*> >&)in passthrough_impl.cc.o > gr::modtest::passthrough_impl::work(int, std::vector<void const*, > std::allocator<void const*> >&, std::vector<void*, std::allocator<void*> >> &)in passthrough_impl.cc.o > ld: symbol(s) not found for architecture x86_64 > collect2: ld returned 1 exit status > make[2]: *** [lib/libgnuradio-modtest.dylib] Error 1 > make[1]: *** [lib/CMakeFiles/gnuradio-modtest.dir/all] Error 2 > make: *** [all] Error 2 > > I am assuming it is because I need to tell cmake to link against > libboost_chrono? In my CMakeCache.txt, the boost library paths are set to > the correct locations: > > //Path to a file. > Boost_INCLUDE_DIR:PATH=/opt/local/include > > //Boost library directory > Boost_LIBRARY_DIRS:FILEPATH=/opt/local/lib > > How do I tell cmake to link against libbboost_chrono?
Look for the find_package(Boost... line. There is a list of required libraries, you should add chrono to this list. -josh > > Tahnks, > Jeff > > > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
