To follow up, in order to keep libpgplot-perl from being upgraded (along
with the giza replacement of pgplot),
echo 'libpgplot-perl hold' | sudo dpkg --set-selections
On 05/24/2018 10:40 PM, Peter Ratzlaff wrote:
I'm not an expert in Ubuntu packaging, but was at least able to revert
to the Xenial packages with the following steps.
mkdir libpgplot-perl
cd libpgplot-perl
wget
http://archive.ubuntu.com/ubuntu/pool/multiverse/libp/libpgplot-perl/libpgplot-perl_2.21.orig.tar.gz
wget
http://archive.ubuntu.com/ubuntu/pool/multiverse/libp/libpgplot-perl/libpgplot-perl_2.21-5build1.dsc
wget
http://archive.ubuntu.com/ubuntu/pool/multiverse/libp/libpgplot-perl/libpgplot-perl_2.21-5build1.debian.tar.xz
dpkg-source -x libpgplot-perl_2.21-5build1.dsc
cd libpgplot-perl-2.21
perl -pi -e s/libpng12/libpng/ debian/control
# some additional packages my system needed for debuild to work
sudo apt-get install gfortran libextutils-f77-perl pgplot5 chrpath
debhelper
# will end with a fatal error, but the deb is built successfully
debuild
cd ../..
sudo apt-get purge libcpgplot0 libpgplot0 -y
sudo apt-get install ./libpgplot-perl/libpgplot-perl_2.21-5build1_amd64.deb
On 05/24/2018 07:18 PM, Karl Glazebrook wrote:
Hi there PDL folk,
I want to bring up an issue with the perl PGPLOT package on
debian/Ubuntu. The apt package is ‘libpgplot-perl’.
(This came up when installing PDL on Ubuntu and getting an unexpected
graphics library instead of pgplot.)
In the latest version of Ubuntu (>=17) someone has replaced the
dependency on the pgplot5 package with one on libcpgplot0.
Seehttps://packages.ubuntu.com/search?keywords=pgplot
libcpgplot0 replaces the true pgplot library with a supposedly API
compatible library provided by the giza package
(seehttp://giza.sourceforge.net/documentation/pgplot.shtml). I can
imagine that someone though this was a good idea as it is newer, C
based, etc.
Unfortunately this is not a good idea. It is not a full replacement,
yet. I am actually quite familiar with giza. The giza library does NOT
implement all pgplot functions and some of them work differently to
the true pgplot library. (I know as I have tested this and have also
corresponded with the developers who are also astronomers just down
the road at Monash Uni). Also this is clearly documented on the above
web page.
Also I do not think it should be done this way. Obviously giza
provides a drop in replacement for those who wants to use it, really
whomever is doing this should try and make a ‘libpgplotgiza-perl’
instead to provide the option.
I wish someone had asked me, after all I am the owner still of the
CPAN PGPLOT package.
Does anyone know how I would go about getting this reversed? It is
quite unclear to me who is making these decisions, I am not familiar
with the Debian packaging universe.
Also I am a bit confused about the relation between Ubuntu and Debian.
According to the debian pages these changes are part of the
unstable/testing distributions?
Any advice and pointers appreciated!
Also anyone know any quick fixes? E.g. how to unstall the Ubuntu 16
version in Ubuntu 18?
Karl
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