Problem linking with ODBC

Thu Aug 19 10:10:00 GMT 2004

> -----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....
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