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freetds - Re: [freetds] Can't compile DB-Lib applications under FreeTDS tree

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  • From: "James K. Lowden" <jklowden AT freetds.org>
  • To: FreeTDS Development Group <freetds AT lists.ibiblio.org>
  • Subject: Re: [freetds] Can't compile DB-Lib applications under FreeTDS tree
  • Date: Thu, 18 Oct 2007 10:09:06 -0400

David Chang wrote:
> I'm trying to build FreeTDS under Cygwin. It seems to build the library
> (libsybdb.a) correctly, but when it tries to link, there are several
> missing references. I simply downloaded 0.64 and ran the following:
>
> ./configure --enable-extra-checks --prefix=/home/dchang/freetds_0.64
> make
>
> Here's the output of the faulty linking...
...
> /bin/sh ../../libtool --tag=CC --mode=link gcc -g -O2 -o freebcp.exe
> freebcp.o ../dblib/libsybdb.la gcc -g -O2 -o freebcp.exe freebcp.o
> ../dblib/.libs/libsybdb.a /usr/lib/libiconv.dll.a freebcp.o: In function
> `process_parameters':
> /home/dchang/svn/swdev/buildtools/src/freetds/freetds-0.64/src/apps/fre
> ebcp.c:244: undefined reference to `_tdsdump_open'

It looks like libsybdb.a is not built correctly. It should include
tdsdump_open et al.

$ nm src/dblib/.libs/libsybdb.a \
| sed -Ene '/tdsdump_open|o:$/p' \
| grep -C1 tdsdump_open
login.o:
U tdsdump_open
read.o:
--
config.o:
U tdsdump_open
query.o:
--
log.o:
00000054 T tdsdump_open
^^^ object code present

What does your log show for the command that produced libsybdb.a?

> The weird thing is that tsql.exe links fine

libsybdb is the db-lib library, which freebcp uses. tsql is really
intended to test the libtds layer. It doesn't need that library because
it doesn't use db-lib.

Each client library includes any functions it needs from the src/tds part
of the tree. Most applications use a client library and get any such
functions that way. tsql instead links to them directly.

HTH. It's hard to describe clearly.

--jkl




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