Re: libpng.so.3 Dependency Issues - Swarm installation

[Geoff Wright]

Paul,

Thank you for the suggestions.  They were helpful in sorting out my 
difficulties. I have managed to successfully install swarm onto RH7.3 and 
thought that other newbies facing similar obstacles would be interested in 
what I did.

Generally, I am not too keen on using the --force option with `rpm'.  However, 
in this situation, I believe that I was required to use it (Paul- you may 
want to interject here!).  

I have provided a copy of my InstallationNotes.txt for you to reference as I 
try to explain what I am doing.

First, RH7.3 comes installed with libpng-1.0.12-2 (or, at least, my choices 
during installation gave rise to this situation). In order to install Swarm, 
however, you need libpng-1.2.0-1 (and other libraries as Paul mentions in his 
documentation:
http://lark.cc.ukans.edu/~pauljohn/Swarm/Swarm-2.2x_RPMSforRH7.2/ ). 

It seemed to me that this would be easy...libpng-1.0.12-2 is simply just an 
earlier version of libpng-1.2.0-1, right? 

What I thought initially:

"address@hidden Downloads]# rpm -Uvh libpng-1.2.0-1.i386.rpm 
error: failed dependencies:
        libpng = 1.0.12 is needed by libpng-devel-1.0.12-2
        libpng.so.2   is needed by cups-libs-1.1.14-15
        libpng.so.2   is needed by cups-1.1.14-15
        libpng.so.2   is needed by netpbm-progs-9.24-3
                ...
                ...
                ..
"
Why didn't this do the trick?...more investigation was needed.

"
address@hidden Downloads]# rpm -qpl libpng-1.0.12-2.i386.rpm 
/usr/lib/libpng.so.2
/usr/lib/libpng.so.2.1.0.12
/usr/share/doc/libpng-1.0.12
/usr/share/doc/libpng-1.0.12/CHANGES
/usr/share/doc/libpng-1.0.12/README
/usr/share/doc/libpng-1.0.12/TODO
/usr/share/doc/libpng-1.0.12/example.c
/usr/share/doc/libpng-1.0.12/libpng.txt
/usr/share/man/man5/png.5.gz
address@hidden Downloads]# rpm -qpl libpng-1.2.0-1.i386.rpm 
/usr/lib/libpng.so.3
/usr/lib/libpng.so.3.1.2.0
/usr/share/doc/libpng-1.2.0
/usr/share/doc/libpng-1.2.0/CHANGES
/usr/share/doc/libpng-1.2.0/README
/usr/share/doc/libpng-1.2.0/TODO
/usr/share/doc/libpng-1.2.0/example.c
/usr/share/doc/libpng-1.2.0/libpng.txt
/usr/share/man/man5/png.5.gz
"

So, libpng-1.0-12-2 provides libpng.so.2 which is required by many 
applications.  Libpng.1.2.0-1 provided libpng.so.3 which is required by 
Swarm.  How to make this two libraries exist concurrently on my box?

This is where I used the --force command:
"address@hidden Downloads]# rpm -ivh --force libpng-1.2.0-1.i386.rpm
Preparing...                ########################################### [100%]
   1:libpng                 ########################################### [100%]
address@hidden Downloads]# 
address@hidden Downloads]# rpm -Uvh libpng-devel-1.2.0-1.i386.rpm 
Preparing...                ########################################### [100%]
   1:libpng-devel           ########################################### [100%]
address@hidden Downloads]# 
"

As I mentioned earlier, using --force is not recommended under most 
circumstances.  In this case, though, it seemed like an appropriate course of 
action.  I do find it odd that newer versions of libraries wouldn't provide 
the functionality of older versions, but then..."who am i to wonder why.."

Hope this helps. Good luck.
geoff


On Friday 17 May 2002 16:49, Paul E Johnson wrote:
> Yes, there is an easy fix.
>
> I only run RH7.2 now, but on my system, the libpng is updated compared
> to the standard distribution. In the same directory where I offer the
> hdf5 package, you can see the libpng too.
>
> http://lark.cc.ukans.edu/~pauljohn/Swarm/miscSupportSoftware/
>
> I bet that RH7.3 does not have the updated libpng. Ah, I see it does
> not. So in addition to the hdf5 rpm, you need these:
>
> http://lark.cc.ukans.edu/~pauljohn/Swarm/miscSupportSoftware/libpng-1.2.0-1
>.i386.rpm
> http://lark.cc.ukans.edu/~pauljohn/Swarm/miscSupportSoftware/libpng-devel-1
>.2.0-1.i386.rpm (and this one supports legacy programs)
> http://lark.cc.ukans.edu/~pauljohn/Swarm/miscSupportSoftware/libpng10-1.0.1
>2-1.i386.rpm
>
> If that does not get it, I'll check it out.
>
> Could be I'll upgrade to a RH7.3 system over the weekend and then I will
> make you some new RPMS.  But you will still have the libpng problem.
>
> In order to use the new Emacs, one must have the new libpng. Or at least
> it was necessary 3 months ago.
>
> Building swarm from tarball is not a terrible thing anymore, but it is
> still demanding and would require some care/study.  The best thing for
> you to do is to get the spec file I use to build the rpm and then use
> that to build a new RPM for yourself.  Much better than building the old
> fashioned way because it is easy to install/remove. Beware you need
> several devel packages that rh does not install by default.
>
> Geoff Wright wrote:
> > Hi,
> >
> > I am sorry if this is an inappropriate question but I am having problems
> > installing Swarm on RedHat 7.3.
> >
> > I need to install the libpng-...- library from Paul Johnson's site which
> > includes the libpng.so.3 file.  However, when I attempt to rpm it, I get
> > a "failed dependency" error.  That is, a number of applications require
> > libpng.so.2. It seems that rpm wants to overwrite libpng.so.2 and I
> > assume that this would not be good.
> >
> > I don't fully understand the rpm tool and I suppose that I could always
> > install swarm with the tarball.  However, before I go ahead with this
> > more time-consuming task I am wondering if there is an easy fix for this
> > problem.
> >
> > I have encountered this before with other rpm's and a good strategy for
> > dealing with it would make my life much more enjoyable. Any advice would
> > be much appreciated.
> >
> > Thanks and take care,
> > geoff
> >
> >                   ==================================
> >    Swarm-Support is for discussion of the technical details of the day
> >    to day usage of Swarm.  For list administration needs (esp.
> >    [un]subscribing), please send a message to <address@hidden>
> >    with "help" in the body of the message.


                  ==================================
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   to day usage of Swarm.  For list administration needs (esp.
   [un]subscribing), please send a message to <address@hidden>
   with "help" in the body of the message.