From: Sergei Golubchik
Date: April 4 2011 3:03pm
Subject: Re: Problem linking STL::map with mysqld
List-Archive: http://lists.mysql.com/internals/38285
Message-Id: <20110404150313.GA13263@janus.mylan>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii

Hi, Hiromichi!

For historical reasons MySQL uses -fno-implicit-templates.
Either disable that or instantiate all your templates explicitly.

To disable: remove it from configure.cmake.

To instantiate explicitly: look at the error message, it says, for
example

...  undefined reference to `std::_Rb_tree<int, std::pair<int const, int>, std::_Select1st<std::pair<int const, int> >, std::less<int>, std::allocator<std::pair<int const, int> > >::_M_erase(std::_Rb_tree_node<std::pair<int const, int> >*)'

which means, you need to put in your source, somewhere:

#ifdef HAVE_EXPLICIT_TEMPLATE_INSTANTIATION
namespace std {
template _Rb_tree<int, std::pair<int const, int>, std::_Select1st<std::pair<int const, int> >, std::less<int>, std::allocator<std::pair<int const, int> > >::_M_erase(std::_Rb_tree_node<std::pair<int const, int> >*);
}
#endif

and repeat for all undefined symbols.

On Apr 02, Hiromichi Watari wrote:
> Hi,
> I'm trying to use STL container "map" with MySQL server but I'm
> getting the following link error at the very end.
> 
> [100%] Building CXX object sql/CMakeFiles/sql.dir/sql_yacc.cc.o
> [100%] Building CXX object sql/CMakeFiles/sql.dir/sql_builtin.cc.o
> Linking CXX static library libsql.a
> [100%] Built target sql
> [100%] Building CXX object sql/CMakeFiles/mysqld.dir/main.cc.o
> Linking CXX executable mysqld
> libsql.a(sql_base.cc.o): In function `std::_Rb_tree<int, std::pair<int const, int>, std::_Select1st<std::pair<int const, int> >, std::less<int>, std::allocator<std::pair<int const, int> > >::~_Rb_tree()':
> sql_base.cc:(.text._ZNSt8_Rb_treeIiSt4pairIKiiESt10_Select1stIS2_ESt4lessIiESaIS2_EED2Ev[_ZNSt8_Rb_treeIiSt4pairIKiiESt10_Select1stIS2_ESt4lessIiESaIS2_EED5Ev]+0x28): undefined reference to `std::_Rb_tree<int, std::pair<int const, int>, std::_Select1st<std::pair<int const, int> >, std::less<int>, std::allocator<std::pair<int const, int> > >::_M_erase(std::_Rb_tree_node<std::pair<int const, int> >*)'
> libsql.a(sql_insert.cc.o): In function `std::map<int, int, std::less<int>, std::allocator<std::pair<int const, int> > >::operator=(std::map<int, int, std::less<int>, std::allocator<std::pair<int const, int> > > const&)':
> sql_insert.cc:(.text._ZNSt3mapIiiSt4lessIiESaISt4pairIKiiEEEaSERKS6_[std::map<int, int, std::less<int>, std::allocator<std::pair<int const, int> > >::operator=(std::map<int, int, std::less<int>, std::allocator<std::pair<int const, int> > > const&)]+0x20): undefined reference to `std::_Rb_tree<int, std::pair<int const, int>, std::_Select1st<std::pair<int const, int> >, std::less<int>, std::allocator<std::pair<int const, int> > >::operator=(std::_Rb_tree<int, std::pair<int const, int>, std::_Select1st<std::pair<int const, int> >, std::less<int>, std::allocator<std::pair<int const, int> > > const&)'
> collect2: ld returned 1 exit status
> make[2]: *** [sql/mysqld] Error 1
> make[1]: *** [sql/CMakeFiles/mysqld.dir/all] Error 2
> make: *** [all] Error 2
> 
Regards,
Sergei