Ubuntu
libodbc++ package

libodbc++ linking problems

Bug #159991 reported by Jefim
8
Affects Status Importance Assigned to Milestone
libodbc++ (Baltix)
New
Undecided
Unassigned
libodbc++ (Ubuntu)
Confirmed
Low
Unassigned
Nominated for Hardy by Matthew Flaschen

Bug Description

The following code fails to link on ubuntu 7.04/7.10

#include <odbc++/preparedstatement.h>
#include <odbc++/resultsetmetadata.h>
#include <odbc++/databasemetadata.h>
#include <odbc++/drivermanager.h>
using namespace odbc;

#include <stdio.h>

int main(){
        odbc::Connection* dbConnection=DriverManager::getConnection("DSN=test" );

}

g++ test.cpp -lodbc++
/tmp/ccS5xAyl.o: In function `main':
test.cpp:(.text+0x3e): undefined reference to `odbc::DriverManager::getConnection(std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)'

The code does not have any problem to link against the library that is build from the libodbc++ sources.

Tags: packaging
Revision history for this message
Guido U. Draheim 2007 (guidod-2007-) wrote :

The ubuntu package has been compiled with an additional set of
DEB_CONFIGURE_EXTRA_FLAGS += --with-unicode --enable-threads

The "--with-unicode" will effectivly define -DODBCXX_UNICODE
which in turn will compile with ODBCXX_STRING=std::wstring !!
However neighter odbc++/config.h nor pkgconfig/libodcbc++.pc
will list the define such that ALL programs depending on the
libodbc++ package can not possibly link - the libodbc++-mt.so
does really contain symbol definitions with std_char_traits<wchar_t>.
You can check that by running
    objdump -TC /usr/lib/libodbc++-mt.so

All this is completely wrong - a normal Ubuntu user will
not want to compile with wchar_t anyway but using utf8-char
instead. Possibly the Ubuntu package maintainer was mistaken
by the --with-unicode option to enable utf8 but it does really
invoke utf16. The Ubuntu libodbc++ DOES NOT PROVIDE any variant
for common utf8 at all and it is hence improbable to be useful.

A small patch would be to add -DODBCXX_UNICODE into the pkgconfig
file and/or appending "#define ODBCXXX_UNICODE" to the installed
odbc++/config.h such that you would get compile errors instead of
linking errors. That would leave the binary *.so as is. - A better
approach would be to assume that the package is broken beyond all
repair so that bogues --with-unicode should be removed and a working
(but binary incompatible) libodbc++.so to be shipped.

Note that this is Ubuntu-only - the Debian package probably works.

Revision history for this message
Guido U. Draheim (guidod) wrote :

ubuntu-specific packaging error

no response => package is unmaintained?

Revision history for this message
Daniel T Chen (crimsun) wrote :

Is this symptom still reproducible in 8.10?

Changed in libodbc++:
importance: Undecided → Low
status: New → Incomplete
Revision history for this message
Matthew Flaschen (matthew-flaschen) wrote :

Can't confirm 8.10, but definitely 8.04 LTS. This is a serious problem that essentially makes the library unusable.

JC Hulce (soaringsky)
Changed in libodbc++ (Ubuntu):
status: Incomplete → New
Thomas Hotz (thotz-deactivatedaccount)
Changed in libodbc++ (Ubuntu):
status: New → Confirmed
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