[odb-users] gcc-5.4: cannot link code produced with odb

[Vladimir Tsichevski]

Hi,

I'm trying to build the odb person example provided with the odb manual. 
My system is Ubunti 16, odb-2.4, and the default compiler is gcc-5.4. I 
got the following linking problems:

g++ -std=c++11 person.cpp person-odb.cxx main.cpp  -lodb-pgsql -lodb

/tmp/cc9XRXgG.o: In function `odb::access::object_traits_impl<person, 
(odb::database_id)2>::init(odb::access::object_traits_impl<person, 
(odb::database_id)2>::image_type&, person const&, 
odb::pgsql::statement_kind)':
person-odb.cxx:(.text+0x49b): undefined reference to 
`odb::pgsql::default_value_traits<std::__cxx11::basic_string<char, 
std::char_traits<char>, std::allocator<char> >, 
(odb::pgsql::database_type_id)10>::set_image(odb::details::basic_buffer<char>&, 
unsigned long&, bool&, std::__cxx11::basic_string<char, 
std::char_traits<char>, std::allocator<char> > const&)'
person-odb.cxx:(.text+0x525): undefined reference to 
`odb::pgsql::default_value_traits<std::__cxx11::basic_string<char, 
std::char_traits<char>, std::allocator<char> >, 
(odb::pgsql::database_type_id)10>::set_image(odb::details::basic_buffer<char>&, 
unsigned long&, bool&, std::__cxx11::basic_string<char, 
std::char_traits<char>, std::allocator<char> > const&)'
/tmp/cc9XRXgG.o: In function `odb::access::object_traits_impl<person, 
(odb::database_id)2>::query(odb::database&, odb::pgsql::query_base const&)':
person-odb.cxx:(.text+0x1754): undefined reference to 
`odb::pgsql::query_base::clause[abi:cxx11]() const'
person-odb.cxx:(.text+0x184d): undefined reference to 
`odb::pgsql::select_statement::select_statement(odb::pgsql::connection&, 
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&, bool, bool, 
unsigned int const*, unsigned long, odb::pgsql::native_binding&, 
odb::pgsql::binding&)'
/tmp/cc9XRXgG.o: In function `odb::access::object_traits_impl<person, 
(odb::database_id)2>::erase_query(odb::database&, odb::pgsql::query_base 
const&)':
person-odb.cxx:(.text+0x1b2f): undefined reference to 
`odb::pgsql::query_base::clause[abi:cxx11]() const'
person-odb.cxx:(.text+0x1be0): undefined reference to 
`odb::pgsql::delete_statement::delete_statement(odb::pgsql::connection&, 
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&, unsigned int 
const*, unsigned long, odb::pgsql::native_binding&)'
collect2: error: ld returned 1 exit status


With gcc-5.4 this error appears regardless whether I use -std=c++11 or not.

But I can successfully link the object files if they were compiled with 
gcc-4.8 on the same system:

g++-4.8 -std=c++11 person.cpp person-odb.cxx main.cpp -lodb-pgsql -lodb

Again, with gcc-4.8 I can successfully compile regardless whether I use 
-std=c++11 or not.

Is there any workaround for this problem?


Regards,

Vladimir

PS: same problem appears if I try to build odb-examples-2.4.0 package

PS1: same problem appears if I try to use odb compiler build from sources