錯誤嘗試使用並行線程在Ubuntu

Question

我閱讀用C線程++教程和測試下面的代碼：

#include <iostream> 
#include <pthread.h> 
#include <cstdlib> 

using namespace std; 

#define NUM_THREADS  5 

void *PrintHello(void *threadid) 
{ 
    long tid; 
    tid = (long)threadid; 
    cout << "Hello World! Thread ID, " << tid << endl; 
    pthread_exit(NULL); 
} 

int main() 
{ 
    pthread_t threads[NUM_THREADS]; 
    int rc; 
    int i; 
    for(i=0; i < NUM_THREADS; i++){ 
     cout << "main() : creating thread, " << i << endl; 
     rc = pthread_create(&threads[i], NULL, 
         PrintHello, &threads[i]); 
     if (rc){ 
     cout << "Error:unable to create thread," << rc << endl; 
     exit(-1); 
     } 
    } 
    pthread_exit(NULL); 
} 

我已經試過同時使用gcc和g ++編譯這段代碼，但我總得到編譯錯誤。

使用GCC -pthread thread_test.c：

/tmp/ccmpQLyp.o: In function PrintHello(void*)': thread_test.cpp:(.text+0x1a): undefined reference to std::cout' thread_test.cpp:(.text+0x1f): undefined reference to std::basic_ostream<char, std::char_traits<char> >& std::operator<< <std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&, char const*)' thread_test.cpp:(.text+0x2e): undefined reference to std::ostream::operator<<(long)' thread_test.cpp:(.text+0x33): undefined reference to std::basic_ostream<char, std::char_traits<char> >& std::endl<char, std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&)' thread_test.cpp:(.text+0x3b): undefined reference to std::ostream::operator<<(std::ostream& (*)(std::ostream&))' /tmp/ccmpQLyp.o: In function main': thread_test.cpp:(.text+0x63): undefined reference to std::cout' thread_test.cpp:(.text+0x68): undefined reference to std::basic_ostream<char, std::char_traits<char> >& std::operator<< <std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&, char const*)' thread_test.cpp:(.text+0x75): undefined reference to std::ostream::operator<<(int)' thread_test.cpp:(.text+0x7a): undefined reference to std::basic_ostream<char, std::char_traits<char> >& std::endl<char, std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&)' thread_test.cpp:(.text+0x82): undefined reference to std::ostream::operator<<(std::ostream& (*)(std::ostream&))' thread_test.cpp:(.text+0xcc): undefined reference to std::cout' thread_test.cpp:(.text+0xd1): undefined reference to std::basic_ostream >& std::operator<< >(std::basic_ostream >&, char const*)' thread_test.cpp:(.text+0xde): undefined reference to std::ostream::operator<<(int)' thread_test.cpp:(.text+0xe3): undefined reference to std::basic_ostream >& std::endl >(std::basic_ostream >&)' thread_test.cpp:(.text+0xeb): undefined reference to std::ostream::operator<<(std::ostream& (*)(std::ostream&))' /tmp/ccmpQLyp.o: In function __static_initialization_and_destruction_0(int, int)': thread_test.cpp:(.text+0x141): undefined reference to std::ios_base::Init::Init()' thread_test.cpp:(.text+0x150): undefined reference to std::ios_base::Init::~Init()' /tmp/ccmpQLyp.o:(.eh_frame+0x47): undefined reference to `__gxx_personality_v0' collect2: error: ld returned 1 exit status

你能幫忙嗎？我需要做些什麼才能讓代碼在Linux和Windows上運行？

Answer 1

使用g++而不是gcc或手動鏈接-lstdc++。