Boost Linker errors in my application

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Hi Friends,

I am not sure why i am getting the below linker errors. Can some one help me in understanding what the error below says., I have no clues on what this errors tell me to do. Kindly help me to understand the error so that i can solve it myself.

>RegularExpressionFilter.obj : error LNK2001: unresolved external symbol "public: virtual __thiscall boost::regex_error::~regex_error(void)" (??1regex_error@boost@@UAE@XZ)
4>RegularExpressionFilter.obj : error LNK2019: unresolved external symbol "private: class boost::basic_regex<char,struct boost::regex_traits<char,class boost::w32_regex_traits<char> > > & __thiscall boost::basic_regex<char,struct boost::regex_traits<char,class boost::w32_regex_traits<char> > >::do_assign(char const *,char const *,unsigned int)" (?do_assign@?$basic_regex@DU?$regex_traits@DV?$w32_regex_traits@D@boost@@@boost@@@boost@@AAEAAV12@PBD0I@Z) referenced in function "public: class boost::basic_regex<char,struct boost::regex_traits<char,class boost::w32_regex_traits<char> > > & __thiscall boost::basic_regex<char,struct boost::regex_traits<char,class boost::w32_regex_traits<char> > >::assign(char const *,char const *,unsigned int)" (?assign@?$basic_regex@DU?$regex_traits@DV?$w32_regex_traits@D@boost@@@boost@@@boost@@QAEAAV12@PBD0I@Z)
4>RegularExpressionFilter.obj : error LNK2019: unresolved external symbol "public: bool __thiscall boost::re_detail::perl_matcher<class std::_String_const_iterator<char,struct std::char_traits<char>,class std::allocator<char> >,class std::allocator<struct boost::sub_match<class std::_String_const_iterator<char,struct std::char_traits<char>,class std::allocator<char> > > >,struct boost::regex_traits<char,class boost::w32_regex_traits<char> > >::find(void)" (?find@?$perl_matcher@V?$_String_const_iterator@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@V?$allocator@U?$sub_match@V?$_String_const_iterator@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@@boost@@@2@U?$regex_traits@DV?$w32_regex_traits@D@boost@@@boost@@@re_detail@boost@@QAE_NXZ) referenced in function "bool __cdecl boost::regex_search<class std::_String_const_iterator<char,struct std::char_traits<char>,class std::allocator<char> >,class std::allocator<struct boost::sub_match<class std::_String_const_iterator<char,struct std::char_traits<char>,class std::allocator<char> > > >,char,struct boost::regex_traits<char,class boost::w32_regex_traits<char> > >(class std::_String_const_iterator<char,struct std::char_traits<char>,class std::allocator<char> >,class std::_String_const_iterator<char,struct std::char_traits<char>,class std::allocator<char> >,class boost::match_results<class std::_String_const_iterator<char,struct std::char_traits<char>,class std::allocator<char> >,class std::allocator<struct boost::sub_match<class std::_String_const_iterator<char,struct std::char_traits<char>,class std::allocator<char> > > > > &,class boost::basic_regex<char,struct boost::regex_traits<char,class boost::w32_regex_traits<char> > > const &,enum boost::regex_constants::_match_flags,class std::_String_const_iterator<char,struct std::char_traits<char>,class std::allocator<char> >)" (??$regex_search@V?$_String_const_iterator@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@V?$allocator@U?$sub_match@V?$_String_const_iterator@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@@boost@@@2@DU?$regex_traits@DV?$w32_regex_traits@D@boost@@@boost@@@boost@@YA_NV?$_String_const_iterator@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@0AAV?$match_results@V?$_String_const_iterator@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@V?$allocator@U?$sub_match@V?$_String_const_iterator@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@@boost@@@2@@0@ABV?$basic_regex@DU?$regex_traits@DV?$w32_regex_traits@D@boost@@@boost@@@0@W4_match_flags@regex_constants@0@0@Z)
4>RegularExpressionFilter.obj : error LNK2019: unresolved external symbol "private: void __thiscall boost::re_detail::perl_matcher<class std::_String_const_iterator<char,struct std::char_traits<char>,class std::allocator<char> >,class std::allocator<struct boost::sub_match<class std::_String_const_iterator<char,struct std::char_traits<char>,class std::allocator<char> > > >,struct boost::regex_traits<char,class boost::w32_regex_traits<char> > >::construct_init(class boost::basic_regex<char,struct boost::regex_traits<char,class boost::w32_regex_traits<char> > > const &,enum boost::regex_constants::_match_flags)" (?construct_init@?$perl_matcher@V?$_String_const_iterator@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@V?$allocator@U?$sub_match@V?$_String_const_iterator@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@@boost@@@2@U?$regex_traits@DV?$w32_regex_traits@D@boost@@@boost@@@re_detail@boost@@AAEXABV?$basic_regex@DU?$regex_traits@DV?$w32_regex_traits@D@boost@@@boost@@@3@W4_match_flags@regex_constants@3@@Z) referenced in function "public: __thiscall boost::re_detail::perl_matcher<class std::_String_const_iterator<char,struct std::char_traits<char>,class std::allocator<char> >,class std::allocator<struct boost::sub_match<class std::_String_const_iterator<char,struct std::char_traits<char>,class std::allocator<char> > > >,struct boost::regex_traits<char,class boost::w32_regex_traits<char> > >::perl_matcher<class std::_String_const_iterator<char,struct std::char_traits<char>,class std::allocator<char> >,class std::allocator<struct boost::sub_match<class std::_String_const_iterator<char,struct std::char_traits<char>,class std::allocator<char> > > >,struct boost::regex_traits<char,class boost::w32_regex_traits<char> > >(class std::_String_const_iterator<char,struct std::char_traits<char>,class std::allocator<char> >,class std::_String_const_iterator<char,struct std::char_traits<char>,class std::allocator<char> >,class boost::match_results<class std::_String_const_iterator<char,struct std::char_traits<char>,class std::allocator<char> >,class std::allocator<struct boost::sub_match<class std::_String_const_iterator<char,struct std::char_traits<char>,class std::allocator<char> > > > > &,class boost::basic_regex<char,struct boost::regex_traits<char,class boost::w32_regex_traits<char> > > const &,enum boost::regex_constants::_match_flags,class std::_String_const_iterator<char,struct std::char_traits<char>,class std::allocator<char> >)" (??0?$perl_matcher@V?$_String_const_iterator@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@V?$allocator@U?$sub_match@V?$_String_const_iterator@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@@boost@@@2@U?$regex_traits@DV?$w32_regex_traits@D@boost@@@boost@@@re_detail@boost@@QAE@V?$_String_const_iterator@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@0AAV?$match_results@V?$_String_const_iterator@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@V?$allocator@U?$sub_match@V?$_String_const_iterator@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@@boost@@@2@@2@ABV?$basic_regex@DU?$regex_traits@DV?$w32_regex_traits@D@boost@@@boost@@@2@W4_match_flags@regex_constants@2@0@Z)
4>Win32\My.exe : fatal error LNK1120: 4 unresolved externals
4>
4>Build FAILED.

Posted 5-Aug-13 18:14pm

gssajith87

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User 59241 · Accepted Answer · 2013-08-05T18:24:00

Solution 1

Quote:
error LNK2001: unresolved external symbol

Tells you immediately that the linker cannot find this symbol in any library. You most likely have not included the required boost library in your project.

See this link for "Using Boost libraries"

Building Boost libraries for Visual Studio[^]

Also

http://stackoverflow.com/questions/2629421/how-to-use-boost-in-visual-studio-2010[^]

Then look at this
http://stackoverflow.com/questions/12714660/linker-error-lnk2019-when-linking-boost-1-51-0-dynamically-in-vs2010[^]

These are error links.
http://msdn.microsoft.com/en-us/library/799kze2z(v=vs.100).aspx[^]

http://msdn.microsoft.com/en-us/library/f6xx1b1z(v=vs.100).aspx[^]

Posted 5-Aug-13 18:24pm

User 59241

Updated 5-Aug-13 19:48pm

v4

Comments

gssajith87 6-Aug-13 1:29am

It looks like i have linked the library appropriately., Any thing else to check

[no name] 6-Aug-13 1:45am

How can you make that statement? You will only know that for sure when linking is complete. The error is clear. I have added other links.

gssajith87 6-Aug-13 7:44am

pwasser,
Thanks for your time., i got it solved., the problem was, the project was linking to libboost_regex-vc100-mt-gd-1_49.lib library, but actually, the my project was to link to libboost_regex-vc100-mt-sgd-1_49.lib library. I was pointing to a libary directory that has both these libaries., I am not sure why my application is automatically linking to the wrong libarary., Any Suggestions on this ?

[no name] 6-Aug-13 8:02am

Well now you know the problem there is stacks on the net about this. Google.

gssajith87 6-Aug-13 8:21am

thanks, will do