linker errors when using df.read('abc.csv')

[zz12218]

Hi, I don't code with C++ that much so this could be due to something stupid.
I'm using linux and VS code, I installed the library (v2.0.0) as given in the readme file.
I can include normally, however, when I compile with the code df.read(''), I get the following errors.
Help!

/usr/bin/ld: /tmp/ccteGjxe.o: in function hmdf::DataFrame<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, hmdf::HeteroVector<0ul> >::read_csv_(std::istream&, bool)::{lambda(char const*, char**)#2}::operator()(char const*, char**) const': /usr/local/include/DataFrame/Internals/DataFrame_read.tcc:430: undefined reference to hmdf::DateTime::DateTime(hmdf::DT_TIME_ZONE)'
/usr/bin/ld: /tmp/ccteGjxe.o: in function hmdf::DataFrame<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, hmdf::HeteroVector<0ul> >::read_csv2_(std::istream&, bool, unsigned long, unsigned long)': /usr/local/include/DataFrame/Internals/DataFrame_read.tcc:662: undefined reference to hmdf::DateTime::DateTime(hmdf::DT_TIME_ZONE)'
/usr/bin/ld: /usr/local/include/DataFrame/Internals/DataFrame_read.tcc:669: undefined reference to hmdf::DateTime::set_time(long, int)' /usr/bin/ld: /usr/local/include/DataFrame/Internals/DataFrame_read.tcc:673: undefined reference to hmdf::DateTime::~DateTime()'
/usr/bin/ld: /usr/local/include/DataFrame/Internals/DataFrame_read.tcc:673: undefined reference to hmdf::DateTime::~DateTime()' /usr/bin/ld: /tmp/ccteGjxe.o: in function hmdf::DataFrame<std::_cxx11::basic_string<char, std::char_traits, std::allocator >, hmdf::HeteroVector<0ul> >::read_json(std::istream&, bool)::{lambda(char const*, char**)#1}::operator()(char const*, char**) const':
/usr/local/include/DataFrame/Internals/DataFrame_read.tcc:268: undefined reference to hmdf::DateTime::DateTime(hmdf::DT_TIME_ZONE)' /usr/bin/ld: /tmp/ccteGjxe.o: in function hmdf::DataFrame<std::_cxx11::basic_string<char, std::char_traits, std::allocator >, hmdf::HeteroVector<0ul> >::ColVectorPushBack<hmdf::DateTime, std::vector<hmdf::DateTime, std::allocatorhmdf::DateTime >, void>::operator()(std::vector<hmdf::DateTime, std::allocatorhmdf::DateTime >&, std::istream&, hmdf::DateTime ()(char const, char**), hmdf::io_format) const':
/usr/local/include/DataFrame/Internals/DataFrame_private_decl.h:374: undefined reference to hmdf::DateTime::DateTime(hmdf::DT_TIME_ZONE)' /usr/bin/ld: /usr/local/include/DataFrame/Internals/DataFrame_private_decl.h:381: undefined reference to hmdf::DateTime::set_time(long, int)'
/usr/bin/ld: /usr/local/include/DataFrame/Internals/DataFrame_private_decl.h:365: undefined reference to hmdf::DateTime::~DateTime()' /usr/bin/ld: /usr/local/include/DataFrame/Internals/DataFrame_private_decl.h:365: undefined reference to hmdf::DateTime::~DateTime()'
/usr/bin/ld: /tmp/ccteGjxe.o: in function unsigned long hmdf::DataFrame<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, hmdf::HeteroVector<0ul> >::load_column<hmdf::DateTime>(char const*, std::vector<hmdf::DateTime, hmdf::allocator_declare<hmdf::DateTime, 0ul>::type>&&, hmdf::nan_policy, bool)': /usr/local/include/DataFrame/Internals/DataFrame_set.tcc:597: undefined reference to hmdf::DateTime::~DateTime()'
/usr/bin/ld: /usr/local/include/DataFrame/Internals/DataFrame_set.tcc:597: undefined reference to hmdf::DateTime::~DateTime()' /usr/bin/ld: /tmp/ccteGjxe.o: in function hmdf::DateTime hmdf::get_nanhmdf::DateTime()':
/usr/local/include/DataFrame/Utils/Utils.h:183: undefined reference to hmdf::DateTime::DateTime(hmdf::DT_TIME_ZONE)' /usr/bin/ld: /tmp/ccteGjxe.o: in function void std::__new_allocatorhmdf::DateTime::construct<hmdf::DateTime, hmdf::DateTime>(hmdf::DateTime*, hmdf::DateTime&&)':
/usr/include/c++/12/bits/new_allocator.h:175: undefined reference to hmdf::DateTime::DateTime(hmdf::DateTime&&)' /usr/bin/ld: /tmp/ccteGjxe.o: in function void std::__new_allocatorhmdf::DateTime::construct<hmdf::DateTime, char (&) [8192], hmdf::DT_DATE_STYLE>(hmdf::DateTime*, char (&) [8192], hmdf::DT_DATE_STYLE&&)':
/usr/include/c++/12/bits/new_allocator.h:175: undefined reference to hmdf::DateTime::DateTime(char const*, hmdf::DT_DATE_STYLE, hmdf::DT_TIME_ZONE)' /usr/bin/ld: /tmp/ccteGjxe.o: in function void std::__new_allocatorhmdf::DateTime::destroyhmdf::DateTime(hmdf::DateTime*)':
/usr/include/c++/12/bits/new_allocator.h:181: undefined reference to hmdf::DateTime::~DateTime()' /usr/bin/ld: /tmp/ccteGjxe.o: in function void std::_Destroyhmdf::DateTime(hmdf::DateTime*)':
/usr/include/c++/12/bits/stl_construct.h:151: undefined reference to hmdf::DateTime::~DateTime()' /usr/bin/ld: /tmp/ccteGjxe.o: in function void std::_Construct<hmdf::DateTime, hmdf::DateTime const&>(hmdf::DateTime*, hmdf::DateTime const&)':
/usr/include/c++/12/bits/stl_construct.h:119: undefined reference to hmdf::DateTime::DateTime(hmdf::DateTime const&)' /usr/bin/ld: /tmp/ccteGjxe.o: in function hmdf::DateTime* std::__copy_move<false, false, std::random_access_iterator_tag>::__copy_m<hmdf::DateTime const*, hmdf::DateTime*>(hmdf::DateTime const*, hmdf::DateTime const*, hmdf::DateTime*)':
/usr/include/c++/12/bits/stl_algobase.h:385: undefined reference to hmdf::DateTime::operator=(hmdf::DateTime const&)' /usr/bin/ld: /tmp/ccteGjxe.o: in function hmdf::DateTime* std::__copy_move<false, false, std::random_access_iterator_tag>::__copy_m<hmdf::DateTime*, hmdf::DateTime*>(hmdf::DateTime*, hmdf::DateTime*, hmdf::DateTime*)':
/usr/include/c++/12/bits/stl_algobase.h:385: undefined reference to hmdf::DateTime::operator=(hmdf::DateTime const&)' /usr/bin/ld: /tmp/ccteGjxe.o: in function void std::_Construct<hmdf::DateTime, hmdf::DateTime&>(hmdf::DateTime*, hmdf::DateTime&)':
/usr/include/c++/12/bits/stl_construct.h:119: undefined reference to `hmdf::DateTime::DateTime(hmdf::DateTime const&)'
collect2: error: ld returned 1 exit status

Build finished with error(s).

[hosseinmoein]

DataFrame is almost a header-only library. It means it is not a header-only library :-). You have to build the archived library first and then link with it when building the executable.
If you just follow the CMake build instructions in REAMME, it should work fine.