Mailing-List: contact cygwin-help@cygwin.com; run by ezmlm List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner@cygwin.com Mail-Followup-To: cygwin@cygwin.com Delivered-To: mailing list cygwin@cygwin.com From: "Dave Korn" To: Subject: RE: Problem linking with ODBC Date: Thu, 19 Aug 2004 10:28:41 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit In-Reply-To: Message-ID: X-OriginalArrivalTime: 19 Aug 2004 09:28:41.0484 (UTC) FILETIME=[EA5B84C0:01C485CE] > -----Original Message----- > From: cygwin-owner On Behalf Of da > Sent: 18 August 2004 20:48 > I'm getting undefined references when trying to link with > libodbc32.a that comes with cygwin: > > --- > > Building target: libTest.so > g++ -shared -o libTest.so testdb.o -lodbc32 > testdb.o(.text+0x40): In function `_Z3foov': > /cygdrive/c/Projects/test/source/Debug/../testdb.cpp:7: > undefined reference to > `_SQLConnect' > collect2: ld returned 1 exit status > make: *** [libTest.so] Error 1 > > --- > > Any idea why _SQLConnect is unresolved? Here's how to find out: use nm to list the library contents and see what's there. dk@mace /artimi> nm /lib/w32api/libodbc32.a | grep SQLConnect 00000000 T _SQLConnectW@28 00000000 I __imp__SQLConnectW@28 00000000 T _SQLConnectA@28 00000000 I __imp__SQLConnectA@28 00000000 T _SQLConnect@28 00000000 I __imp__SQLConnect@28 dk@mace /artimi> It seems it's not matching because the symbol is decorated. There's an ld option to deal with this: --enable-stdcall-fixup Link _sym to _sym@nn without warnings To pass it through the g++ command line, you'll need to prefix it with -Wl, so try it like this: > g++ -Wl,--enable-stdcall-fixup -shared -o libTest.so testdb.o -lodbc32 cheers, DaveK -- Can't think of a witty .sigline today.... -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/