This is the mail archive of the cygwin mailing list for the Cygwin project.


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]
Other format: [Raw text]

RE: Problem linking with ODBC


> -----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/


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]