Hi Josh, Thanks! That worked.
Jeff On Fri, Jan 25, 2013 at 11:14 PM, Josh Blum <j...@joshknows.com> wrote: > > > 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 >
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