Does anyone know how to fix the following error?
Compiling…
/tmp/lurda/ccoTygUM.o: In function `HISTS::Save(TopAnalysis&, SAMPLES const&, ASCII&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)':
analysis_example.C:(.text._ZN5HISTS4SaveER11TopAnalysisRK7SAMPLESR5ASCIIRKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEESE_SE_SE_[_ZN5HISTS4SaveER11TopAnalysisRK7SAMPLESR5ASCIIRKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEESE_SE_SE_]+0xae): undefined reference to `TString::TString(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)'
/tmp/lurda/cc1T8mrU.o: In function `CMSAnalysis::SetTreeFile(int, int)':
CMSAnalysisLU.C:(.text+0x35c6): undefined reference to `TString::TString(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)'
/tmp/lurda/ccQ9V2V4.o: In function `FICH::Readingtxtfiles(char const*)':
SamplesClassLU.C:(.text+0x379): undefined reference to `TString::TString(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)'
SamplesClassLU.C:(.text+0x420): undefined reference to `TString::operator=(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)'
SamplesClassLU.C:(.text+0x43d): undefined reference to `TString::operator=(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)'
SamplesClassLU.C:(.text+0x45a): undefined reference to `TString::operator=(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)'
collect2: error: ld returned 1 exit status
Compilation done.