Question

我正在尝试使用boost regex库，但我无法编译我的程序。涉及类似错误消息的所有相关问题似乎与正则表达式库未正确链接的情况有关。我认为我正在联系它，但也许我正在做一些愚蠢的事情......也许有人看到了我的错误？这是我的测试程序：

// ~/workspace/test/test.cpp
#include <string>
#include <iostream>
#include <boost/regex.hpp>
int main(){
   std::string s("abaab");
   boost::regex r("[ab]*");
   std::cout << boost::regex_match(s,r) << std::endl;   
}

以下是boost二进制文件（我在Xubuntu上通过synaptic安装了它们）：

  /usr/lib/i386-linux-gnu$ ls libboost_regex* -al
  -rw-r--r-- 1 root root 2169582 Okt 13 05:14 libboost_regex.a
  lrwxrwxrwx 1 root root      24 Okt 13 05:13 libboost_regex.so -> libboost_regex.so.1.53.0
  -rw-r--r-- 1 root root 1002568 Okt 13 05:14 libboost_regex.so.1.53.0

然而，在运行

时，我收到了一条非常难看的错误消息

~/workspace/test$ g++ -L/usr/lib/i386-linux-gnu/ -lboost_regex test.cpp

以下是完整的信息：

  ~/workspace/test$ g++ -L/usr/lib/i386-linux-gnu/ -lboost_regex test.cpp 
  /tmp/cc1yDf0v.o: In function `bool boost::regex_match<__gnu_cxx::__normal_iterator<char const*, std::string>, std::allocator<boost::sub_match<__gnu_cxx::__normal_iterator<char const*, std::string> > >, char, boost::regex_traits<char, boost::cpp_regex_traits<char> > >(__gnu_cxx::__normal_iterator<char const*, std::string>, __gnu_cxx::__normal_iterator<char const*, std::string>, boost::match_results<__gnu_cxx::__normal_iterator<char const*, std::string>, std::allocator<boost::sub_match<__gnu_cxx::__normal_iterator<char const*, std::string> > > >&, boost::basic_regex<char, boost::regex_traits<char, boost::cpp_regex_traits<char> > > const&, boost::regex_constants::_match_flags)':
  test.cpp:(.text._ZN5boost11regex_matchIN9__gnu_cxx17__normal_iteratorIPKcSsEESaINS_9sub_matchIS5_EEEcNS_12regex_traitsIcNS_16cpp_regex_traitsIcEEEEEEbT_SD_RNS_13match_resultsISD_T0_EERKNS_11basic_regexIT1_T2_EENS_15regex_constants12_match_flagsE[_ZN5boost11regex_matchIN9__gnu_cxx17__normal_iteratorIPKcSsEESaINS_9sub_matchIS5_EEEcNS_12regex_traitsIcNS_16cpp_regex_traitsIcEEEEEEbT_SD_RNS_13match_resultsISD_T0_EERKNS_11basic_regexIT1_T2_EENS_15regex_constants12_match_flagsE]+0x4c): undefined reference to `boost::re_detail::perl_matcher<__gnu_cxx::__normal_iterator<char const*, std::string>, std::allocator<boost::sub_match<__gnu_cxx::__normal_iterator<char const*, std::string> > >, boost::regex_traits<char, boost::cpp_regex_traits<char> > >::match()'
  /tmp/cc1yDf0v.o: In function `boost::basic_regex<char, boost::regex_traits<char, boost::cpp_regex_traits<char> > >::assign(char const*, char const*, unsigned int)':
  test.cpp:(.text._ZN5boost11basic_regexIcNS_12regex_traitsIcNS_16cpp_regex_traitsIcEEEEE6assignEPKcS7_j[_ZN5boost11basic_regexIcNS_12regex_traitsIcNS_16cpp_regex_traitsIcEEEEE6assignEPKcS7_j]+0x22): undefined reference to `boost::basic_regex<char, boost::regex_traits<char, boost::cpp_regex_traits<char> > >::do_assign(char const*, char const*, unsigned int)'
  /tmp/cc1yDf0v.o: In function `boost::re_detail::perl_matcher<__gnu_cxx::__normal_iterator<char const*, std::string>, std::allocator<boost::sub_match<__gnu_cxx::__normal_iterator<char const*, std::string> > >, boost::regex_traits<char, boost::cpp_regex_traits<char> > >::perl_matcher(__gnu_cxx::__normal_iterator<char const*, std::string>, __gnu_cxx::__normal_iterator<char const*, std::string>, boost::match_results<__gnu_cxx::__normal_iterator<char const*, std::string>, std::allocator<boost::sub_match<__gnu_cxx::__normal_iterator<char const*, std::string> > > >&, boost::basic_regex<char, boost::regex_traits<char, boost::cpp_regex_traits<char> > > const&, boost::regex_constants::_match_flags, __gnu_cxx::__normal_iterator<char const*, std::string>)':
  test.cpp:(.text._ZN5boost9re_detail12perl_matcherIN9__gnu_cxx17__normal_iteratorIPKcSsEESaINS_9sub_matchIS6_EEENS_12regex_traitsIcNS_16cpp_regex_traitsIcEEEEEC2ES6_S6_RNS_13match_resultsIS6_S9_EERKNS_11basic_regexIcSD_EENS_15regex_constants12_match_flagsES6_[_ZN5boost9re_detail12perl_matcherIN9__gnu_cxx17__normal_iteratorIPKcSsEESaINS_9sub_matchIS6_EEENS_12regex_traitsIcNS_16cpp_regex_traitsIcEEEEEC5ES6_S6_RNS_13match_resultsIS6_S9_EERKNS_11basic_regexIcSD_EENS_15regex_constants12_match_flagsES6_]+0xcd): undefined reference to `boost::re_detail::perl_matcher<__gnu_cxx::__normal_iterator<char const*, std::string>, std::allocator<boost::sub_match<__gnu_cxx::__normal_iterator<char const*, std::string> > >, boost::regex_traits<char, boost::cpp_regex_traits<char> > >::construct_init(boost::basic_regex<char, boost::regex_traits<char, boost::cpp_regex_traits<char> > > const&, boost::regex_constants::_match_flags)'
  collect2: error: ld returned 1 exit status

似乎找到了标题，对吧？ gcc如何知道boost::re_detail::perl_matcher或boost::basic_regex？我不知道问题可能是什么。也许它毕竟是连接？提前谢谢！

Answer 1

您只需要确保图书馆来自您自己的资源。

g++ -L/usr/lib/i386-linux-gnu/ test.cpp -lboost_regex

这是一个FAQ：

可能还有更多。我想（遗憾的是）其中一个与领土相关的 rite-of-passage :(

如何包含/链接boost :: regex库？

1 个答案: