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 :: 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 :: set< ; std :: basic_string< char,std :: allocator< ; char>>>,bool)] 0x24)： undefined reference toboost :: 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>>,bool)] 0x5f)：未定义的引用boost :: program_options :: detail :: common_config_file_iterator :: get( )”
/tmp/ccNQEbJM.o：在functionboost :: eof_iterator> :: increment()’中：
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()’的未定义引用
/tmp/ccNQEbJM.o：在functionboost :: program_options :: detail :: basic_config_file_iterator :: getline(std :: basic_string,std :: allocator>&)’中：
a.cpp :(.text._ZN5boost15program_options6detail26basic_config_file_iteratorIcE7getlineERSS [boost :: program_options :: detail :: basic_config_file_iterator :: getline(std :: basic_string,std :: allocator>&)] 0x5b)：未定义的引用`boost :: program_options :: to_internal(std :: basic_string,std :: allocator> const&)’
collect2：ld返回1退出状态
我无法弄清楚出错的地点和原因.
解决方法
edd@max:/tmp$cat bpoex.cpp
#include <iostream>
#include <string>
#include <set>
#include <sstream>
#include <boost/config.hpp>
#include <boost/program_options/detail/config_file.hpp>
#include <boost/program_options/parsers.hpp>
namespace pod = boost::program_options::detail;
int main()
{
//contents
std::stringstream s(
"a = 1\n"
"b = 2\n"
"c = test option\n");
//parameters
std::set<std::string> options;
options.insert("a");
options.insert("b");
options.insert("c");
//parser
for (pod::config_file_iterator i(s,e ; i != e; ++i)
{
std::cout << i->value[0] << std::endl;
}
}
edd@max:/tmp$g++ -o bpoex bpoex.cpp -lboost_program_options
edd@max:/tmp$./bpoex
1
2
test option
edd@max:/tmp$
