Eroare de compilare: main.cpp: In lambda function: main.cpp:30:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<colier.size(); ++i) ~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:51:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<workers.size(); ++i){ ~^~~~~~~~~~~~~~~ ./cctxWVfg.o: In function `main': main.cpp:(.text.startup+0x285): undefined reference to `pthread_create' /usr/lib/gcc/x86_64-linux-gnu/6/libstdc++.a(thread.o): In function `std::thread::_M_start_thread(std::unique_ptr<std::thread::_State, std::default_delete<std::thread::_State> >, void (*)())': (.text._ZNSt6thread15_M_start_threadESt10unique_ptrINS_6_StateESt14default_deleteIS1_EEPFvvE+0x11): undefined reference to `pthread_create' /usr/lib/gcc/x86_64-linux-gnu/6/libstdc++.a(thread.o): In function `std::thread::_M_start_thread(std::shared_ptr<std::thread::_Impl_base>, void (*)())': (.text._ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEEPFvvE+0x5f): undefined reference to `pthread_create' collect2: error: ld returned 1 exit status Non zero exit status: 1