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