[Bug 20042] Wine does not build on amd64 when linking to 32-bit libmpg123

[wine-bugs at winehq.org]

http://bugs.winehq.org/show_bug.cgi?id=20042





--- Comment #15 from Erich Hoover <ehoover at mines.edu>  2009-10-31 14:59:00 ---
(In reply to comment #13)
> ...
> austin at midna:~/wine-git/tools/winebuild$ dlocate libmpg123.so
> libmpg123-dev: /usr/lib/libmpg123.so
> ia32-libs: /usr/lib32/libmpg123.so.0.14.4
> ia32-libs: /usr/lib32/libmpg123.so.0
> ia32-libs: /usr/lib32/libmpg123.so
> libmpg123-0: /usr/lib/libmpg123.so.0.14.4
> libmpg123-0: /usr/lib/libmpg123.so.0
> 
> austin at midna:~/wine-git/tools/winebuild$ dpkg -l | grep ia32
> ii  ia32-libs                                  2.7ubuntu17                     
>           ia32 shared libraries for use on amd64 and i

Ok, I think there's a bit of a miscommunication here - my response was intended
to touch on the comment "even after I've added a 32 bit version of libmpg123-0
to the ia32-libs package."  I was trying to say that my ia32-libs already had a
32-bit libmpg123.

My other comments indicated that what I believe is the problem is that
libmpg123-dev is distributing an incorrect header file for the purposes of
linking to the 32-bit version of the library.  I would say that the header file
should be testing the architecture to determine the symbol names, look near the
comment:
/* Redefine names of functions dealing with file and file offsets
   ...everything handling off_t, for example, which can be 32 or 64 bits. */

Since you can see that the symbol names are different between the 32-bit and
64-bit versions:
ehoover at ubuntu:/usr/lib64$ nm -D libmpg123.so | grep feedseek
0000000000012ef0 T mpg123_feedseek
ehoover at ubuntu:/usr/lib32$ nm -D libmpg123.so | grep feedseek
000141f0 T mpg123_feedseek_64

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