I installed the boost library on my ubuntu using sudo apt-get install libboost-all-dev .

Wikipedia example is not compiled:

 #include <boost/thread/thread.hpp> #include <iostream> using namespace std; void hello_world() { cout << "Здравствуй, мир, я - thread!" << endl; } int main(int argc, char* argv[]) { boost::thread my_thread(&hello_world); my_thread.join(); return 0; }

The compiler gives an error:

 /tmp/ccq2zeuG.o: In function `__static_initialization_and_destruction_0(int, int)': ch.cpp:(.text+0xd4): undefined reference to `boost::system::generic_category()' ch.cpp:(.text+0xe0): undefined reference to `boost::system::generic_category()' ch.cpp:(.text+0xec): undefined reference to `boost::system::system_category()' /tmp/ccq2zeuG.o: In function `boost::thread_exception::thread_exception(int, char const*)': ch.cpp:(.text._ZN5boost16thread_exceptionC2EiPKc[_ZN5boost16thread_exceptionC5EiPKc]+0x23): undefined reference to `boost::system::system_category()' /tmp/ccq2zeuG.o: In function `boost::detail::thread_data_base::thread_data_base()': ch.cpp:(.text._ZN5boost6detail16thread_data_baseC2Ev[_ZN5boost6detail16thread_data_baseC5Ev]+0x1e): undefined reference to `vtable for boost::detail::thread_data_base' /tmp/ccq2zeuG.o: In function `boost::thread::start_thread()': ch.cpp:(.text._ZN5boost6thread12start_threadEv[_ZN5boost6thread12start_threadEv]+0x24): undefined reference to `boost::thread::start_thread_noexcept()' /tmp/ccq2zeuG.o: In function `boost::thread::~thread()': ch.cpp:(.text._ZN5boost6threadD2Ev[_ZN5boost6threadD5Ev]+0x15): undefined reference to `boost::thread::detach()' /tmp/ccq2zeuG.o: In function `boost::thread::get_id() const': ch.cpp:(.text._ZNK5boost6thread6get_idEv[_ZNK5boost6thread6get_idEv]+0x18): undefined reference to `boost::thread::native_handle()' /tmp/ccq2zeuG.o: In function `boost::thread::join()': ch.cpp:(.text._ZN5boost6thread4joinEv[_ZN5boost6thread4joinEv]+0x88): undefined reference to `boost::thread::join_noexcept()' /tmp/ccq2zeuG.o: In function `boost::detail::thread_data<void (*)()>::~thread_data()': ch.cpp:(.text._ZN5boost6detail11thread_dataIPFvvEED2Ev[_ZN5boost6detail11thread_dataIPFvvEED5Ev]+0x20): undefined reference to `boost::detail::thread_data_base::~thread_data_base()' /tmp/ccq2zeuG.o:(.rodata._ZTIN5boost6detail11thread_dataIPFvvEEE[_ZTIN5boost6detail11thread_dataIPFvvEEE]+0x10): undefined reference to `typeinfo for boost::detail::thread_data_base' collect2: error: ld returned 1 exit status

How to compile programs that use boost?

  • Need to specify the library linker - Abyx
  • Well, in my example, you can say which command to enter? - Anton
  • one
    g++ -lboost_thread -lboost_system ch.cpp -o ch - KoVadim
  • The same error gives - Anton

1 answer 1

These are linker errors, not compiler errors: the linker does not know where to get the implementation of the functions used. It is necessary to indicate to the linker which libraries to connect, where they are located, and so on. Since you did not specify how exactly you are building the program, it is problematic to specify specific steps for correction.

  • Well, if the corrective steps are problematic, please cite the steps from first to last, how to link and compile. Thank. @ Vladimir - Anton
  • @ Anton you find it difficult to specify exactly how you are collecting the program, but should I write a treatise on 16 pages? Nice approach ... But I will refrain. - Vladimir Martyanov