undefined reference to `sqlpp::mysql::connection::~connection()' - c++

Question

I am using SQLPP11 for sql queries and results and SQLPP11-Connector-mysql to establish connection with database.
And compiling my program using
g++ -std=c++1y main.cpp -I ../date -lsqlpp-mysql -lmysqlclient -lboost_system -lpthread
And here is the sample code i am using.
bool db_connection()
{
auto config = std::make_shared<mysql::connection_config>();
config->user = "root";
config->password = "";
config->database = "test";
config->debug = true;
sqlpp::mysql::connection db(config);
try
{
sqlpp::mysql::connection db(config);
std::cout << "Database connection establish...!!\n";
std::cout << "Now executing a very simple select query in table using sqlpp11 \n";
const auto g = changestreet::Goals{};
for(const auto& row : db(select(all_of(g)).from(g).unconditionally()))
{
std::cerr << row.goalId << "\n";
std::cerr << row.goalName << "\n";
std::cerr << row.goalAmount << "\n";
}
}
catch (const sqlpp::exception& e)
{
std::cerr << "No such database exits, you'll need to create it. \n";
std::cerr << e.what() << std::endl;
return false;
}
return true;
}
And the errors are
/tmp/ccxRheKs.o: In function `db_connection_cs()':
main.cpp:(.text+0x39d): undefined reference to `sqlpp::mysql::connection::connection(std::shared_ptr<sqlpp::mysql::connection_config> const&)'
main.cpp:(.text+0x3c8): undefined reference to `sqlpp::mysql::connection::~connection()'
main.cpp:(.text+0x400): undefined reference to `sqlpp::mysql::connection::~connection()'
/tmp/ccxRheKs.o: In function `db_connection_nav()':
main.cpp:(.text+0x4bf): undefined reference to `sqlpp::mysql::connection::connection(std::shared_ptr<sqlpp::mysql::connection_config> const&)'
main.cpp:(.text+0x4ea): undefined reference to `sqlpp::mysql::connection::~connection()'
main.cpp:(.text+0x522): undefined reference to `sqlpp::mysql::connection::~connection()'
/tmp/ccxRheKs.o: In function `sqlpp::mysql::serializer_t::escape(std::string)':
main.cpp:(.text._ZN5sqlpp5mysql12serializer_t6escapeESs[_ZN5sqlpp5mysql12serializer_t6escapeESs]+0x2a): undefined reference to `sqlpp::mysql::connection::escape(std::string const&) const'
/tmp/ccxRheKs.o: In function `sqlpp::result_t<sqlpp::mysql::char_result_t, sqlpp::result_row_t<sqlpp::mysql::connection, sqlpp::field_spec_t<changestreet::Goals_::GoalId::_alias_t, sqlpp::integral, false, false>, sqlpp::field_spec_t<changestreet::Goals_::GoalName::_alias_t, sqlpp::text, true, false>, sqlpp::field_spec_t<changestreet::Goals_::GoalAmount::_alias_t, sqlpp::floating_point, true, false>, sqlpp::field_spec_t<changestreet::Goals_::GoalStartTime::_alias_t, sqlpp::day_point, true, false>, sqlpp::field_spec_t<changestreet::Goals_::GoalEndTime::_alias_t, sqlpp::day_point, true, false>, sqlpp::field_spec_t<changestreet::Goals_::GoalMonthlyContribution::_alias_t, sqlpp::floating_point, true, false>, sqlpp::field_spec_t<changestreet::Goals_::GoalStatus::_alias_t, sqlpp::text, true, false>, sqlpp::field_spec_t<changestreet::Goals_::UsersUserId::_alias_t, sqlpp::integral, true, false> > >::~result_t()':
main.cpp:(.text._ZN5sqlpp8result_tINS_5mysql13char_result_tENS_12result_ro
Here is the build logs of both the libraries on my 64 bit debian machine.

Answer 1

Finally, i have figured out the solution.
It was the problem with g++ version. Recent versions g++-5 and g++-6 have such problems, But when i get back to old g++ version 4.9.2 everything is running smooth.

Answer 2

"undefined reference to" usually means that the linker can not find the required library. Make sure your PATH environment has those libs sqlpp-mysql mysqlclient in scope.