Re: RH shared library issues (Re: libjpeg problems)

[Toshio Kuratomi <badger prtr-13 ucsc edu>]

On Fri, 15 May, 1998 at 07:21:34PM -0400, Steve Dunham set free these words:
> Marc Ewing <marc@redhat.com> writes:
> 
> > Steve Dunham <dunham@cps.msu.edu> writes:
> 
> > > Yup, apparently someone has seen fit to release a copy of the
> > > libjpeg-6b library, which is NOT binary compatible with libjpeg-6a,
> > > with a soname of libjpeg.so.6.  Apparently whoever is compiling the
> > > RPM snapshots is using this.  Further, there is a copy of libjpeg-6b
> > > in contrib with an soname of libjpeg.so.7, which won't be loaded
> > > against the snapshot binaries at runtime.
> 
> > As far as I know, this is the way the jpeg library is shipped in
> > source.
> 
> Nope. I just checked, and it seems we are both wrong.  The upstream
> version number is 62.  The correct way to compile the package is:
> 
>    ./configure --enabled-shared --enable-static --prefix=/usr
> 
> This will use libtool and a major version number of 62.
> 
Well, at least they finally switched to libtool.  The 6a release had no way to
build shared libraries.  All the libjpeg.so.6's (and .1's) were in fact
unilateral decisions by sys.admins/distributions to make a shared library.

> > The reason you see this in the GNOME stuff is that it uses libtool
> > and currently shared library "dependencies" like you are talking
> > about disabled in libtool.
> 
> This seems to be turned on in the Debian libtool package. The libtool
> program on Debian has \$deplibs at the end of the "archive_cmds"
> variable, Red Hat doesn't.
> 
Unless it's an older version of libtool, this is just a hack to make deplibs
work (and breaks on some non-linux systems because it can link static
libraries into shared libraries.) I built something a lot more robust at
libtool-1.0i and submitted it to the libtool author, but he wasn't going to
put it in until the next development cycle (Which is actually now... I should
go check the 1.2a and see if the patch is in or not...)  I looked at 1.1 and
1.2 and I know my old patch would not apply cleanly to them.

-Toshio
-- 
badger  \"The Difference between today and yesterday is not so much what has
@prtr-13 \ changed between then and now as what I hope to change by tomorrow."
.ucsc.edu  \~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~