我在ubuntu 10.04上安装了boost
sudo apt-get install libboost-dev
我想在那之后我不需要设置任何-I和-L标志,所以我编译我的代码
g++ test.cpp
这是我的test.cpp
#include <iostream>
#include <string>
#include <set>
#include <sstream>
#include <boost/config.hpp>
#include <boost/program_options/detail/config_file.hpp>
#include <boost/program_options/parsers.hpp>
namespace pod = boost::program_options::detail;
int main()
{
//contents
std::stringstream s(
"a = 1\n"
"b = 2\n"
"c = test option\n");
//parameters
std::set<std::string> options;
options.insert("a");
options.insert("b");
options.insert("c");
//parser
for (pod::config_file_iterator i(s, options), e ; i != e; ++i)
{
std::cout << i->value[0] << std::endl;
}
}
我认为情况会顺利,但实际上有一些错误:
/tmp/ccNQEbJM.o:在函数 boost::program_options::detail::basic_config_file_iterator<char>::basic_config_file_iterator(std::basic_istream<char, std::char_traits<char> >&, std::set<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > const&, bool)': a.cpp:(.text._ZN5boost15program_options6detail26basic_config_file_iteratorIcEC1ERSiRKSt3setISsSt4lessISsESaISsEEb[boost::program_options::detail::basic_config_file_iterator<char>::basic_config_file_iterator(std::basic_istream<char, std::char_traits<char> >&, std::set<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > const&, bool)]+0x24): undefined reference to
boost :: program_options :: detail :: common_config_file_iterator :: common_config_file_iterator(std :: set,std :: allocator>,std :: less,std :: allocator >>,std :: allocator,std :: allocator >>> const&,bool)'a.cpp :( . text._ZN5boost15program_options6detail26basic_config_file_iteratorIcEC1ERSiRKSt3setISsSt4lessISsESaISsEEb [boost :: program_options :: detail :: basic_config_file_iterator :: basic_config_file_iterator(std :: basic_istream>&,std :: set, std :: allocator>,std :: less,std :: allocator >>,std :: allocator,std :: allocator >>> const&,bool)] 0x5f):对 boost::program_options::detail::common_config_file_iterator::get()' /tmp/ccNQEbJM.o: In function
boost :: eof_iterator> :: increment的未定义引用()':a.cpp :( . text._ZN5boost12eof_iteratorINS_15program_options6detail27common_config_file_iteratorENS1_12basic_optionIcEEE9incrementEv [boost :: eof_iterator> :: increment()] 0x10):对 boost::program_options::detail::common_config_file_iterator::get()' /tmp/ccNQEbJM.o: In function
boost :: program_options :: detail :: basic_config_file_iterator :: getline(std :: basic_string)的未定义引用,std :: allocator>&)': a.cpp:(.text._ZN5boost15program_options6detail26basic_config_file_iteratorIcE7getlineERSs[boost::program_options::detail::basic_config_file_iterator::getline(std::basic_string, std::allocator >&)]+0x5b): undefined reference to `boost::program_options::to_internal(std::basic_string, std::allocator > const&)' collect2:ld返回1 exi t状态
我无法弄清楚出错的地点和原因 .
1 回答
您需要链接到Boost program_options库,因为Boost中的所有内容都不是纯模板: