Stefan Potyra wrote:
When trying to install a package which uses libpetsc and was built on
a Debian etch system on Ubuntu, the binary linked against
libpetsc.so.2.3.2 will not work on Ubuntu as the symbol queue is
used by Ubunbtu's libpetsc2.3.2 but not defined in the library.
Debian's libpetsc2.3.2 provides the queue symbol in the BSS
section.
This can be a result of a different build environment between debian and
ubuntu. It's not encouraged to install packages built for debian in Ubuntu,
and it's also not supported.
The package in question is the nmag micromagnetic simulation suite,
developed at the University of Southampton, which is available from:
http://nmag.soton.ac.uk/nmag/
One thing you can try is to get the Debian source package for the application
in question and rebuilt this on the Ubuntu system.
Our build system is Debian-based, and we would strongly like to provide
an easy way to install our simulation code to other researchers,
preferably through an unified apt repository for multiple dpkg-based
distributions (such as Debian, Knoppix, Ubuntu):
http://nmag.soton.ac.uk/nmag/current/install/debian.html
So, if we wanted to provide a separate Ubuntu .deb package, we would
presumably have to set up and maintain Ubuntu in a chroot environment.
Is this effort really necessary, as we know by now that the problem
really is just a broken libpetsc2.3.2 package in Ubuntu? Installing
the Debian libpetsc2.3.2 package on the Ubuntu system resolves the
problem, and - I am 100% sure - so would fixing the problem that
Ubuntu's libpetsc2.3.2 lacks the queue symbol. By the way, I
strongly doubt any program linking against libpetsc will work with
that package if this symbol is not present.
The source package of petsc (at least for gutsy) is the unmodified package
from Debian. However as written above, the build environment may be
different.
The definition of the symbol in question seems to be in
petsc-2.3.2/src/sys/fileio/mprint.c (line 147); strangely, the symbol
does get referenced in the Ubuntu library (nm -D shows it as U), but
it is not defined. It is in the BSS section in the Debian variant of
the library.
--
best regards,
Dr. Thomas Fischbacher
[EMAIL PROTECTED]
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