$ cpanm -i PDL::Graphics::PLplot
--> Working on PDL::Graphics::PLplot
Fetching http://www.cpan.org/authors/id/D/DH/DHUNT/PDL-Graphics-PLplot
+-0.74.tar.gz ... OK
Configuring PDL-Graphics-PLplot-0.74 ... OK
Building and testing PDL-Graphics-PLplot-0.74 ... OK
Successfully installed PDL-Graphics-PLplot-0.74
1 distribution installed
$
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$ perl -MPDL::Graphics::PLplot -le 'print "ok";'
Can't locate PDL/Graphics/PLplot.pm in @INC (you may need to install t
+he PDL::Graphics::PLplot module) (@INC contains: /home/sisyphus/perl-
+5.32.0-d/lib/site_perl/5.32.0/x86_64-linux /home/sisyphus/perl-5.32.0
+-d/lib/site_perl/5.32.0 /home/sisyphus/perl-5.32.0-d/lib/5.32.0/x86_6
+4-linux /home/sisyphus/perl-5.32.0-d/lib/5.32.0).
BEGIN failed--compilation aborted.
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$ cpan -i PDL::Graphics::PLplot
Loading internal logger. Log::Log4perl recommended for better logging
Reading '/home/sisyphus/.cpan/Metadata'
  Database was generated on Thu, 20 Aug 2020 00:17:03 GMT
Running install for module 'PDL::Graphics::PLplot'
Checksum for /home/sisyphus/.cpan/sources/authors/id/D/DH/DHUNT/PDL-Gr
+aphics-PLplot-0.74.tar.gz ok
'YAML' not installed, will not store persistent state
Configuring D/DH/DHUNT/PDL-Graphics-PLplot-0.74.tar.gz with Makefile.P
+L
PDL is installed

Checking PDL::Graphics::PLplot...
Searching for libplplot.so library.
Searching for libplplotd.so library.
Cannot find plplot library (libplplotd.so), skipping PDL::Graphics::PL
+plot

      Not building PDL::Graphics::PLplot


Cannot find plplot library (libplplotd.so), skipping PDL::Graphics::PL
+plot      Not building PDL::Graphics::PLplot
Checking if your kit is complete...
Looks good
  DHUNT/PDL-Graphics-PLplot-0.74.tar.gz
  /home/sisyphus/perl-5.32.0-d/bin/perl Makefile.PL -- OK
Running make for D/DH/DHUNT/PDL-Graphics-PLplot-0.74.tar.gz
Could not read metadata file. Falling back to other methods to determi
+ne prerequisites
make: Nothing to be done for 'all'.
  DHUNT/PDL-Graphics-PLplot-0.74.tar.gz
  /usr/bin/make -- OK
The current configuration of allow_installing_outdated_dists is 'ask/y
+es', but for this option we would need 'CPAN::DistnameInfo' installed
+. Please install 'CPAN::DistnameInfo' as soon as possible. As long as
+ we are not equipped with 'CPAN::DistnameInfo' this option does not t
+ake effect
Running make test for DHUNT/PDL-Graphics-PLplot-0.74.tar.gz
make: Nothing to be done for 'test'.
  DHUNT/PDL-Graphics-PLplot-0.74.tar.gz
  /usr/bin/make test -- OK
Running make install for DHUNT/PDL-Graphics-PLplot-0.74.tar.gz
make: Nothing to be done for 'install'.
  DHUNT/PDL-Graphics-PLplot-0.74.tar.gz
  /usr/bin/make install  -- OK
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apt install libplplot-dev, but I experience the problem reported in issue 6.

apt install libplplot-dev, but I experience the problem reported in issue 6

Yep, sudo apt-get install libplplot-dev worked fine. Thanks !

I don't experience the problem reported in issue 6, perhaps because I'm trying to install version 0.74. The PLplot.so loads without any problem - but there are some test failures (including a segfault):

Test Summary Report
-------------------
t/plplot.t              (Wstat: 139 Tests: 15 Failed: 0)
  Non-zero wait status: 139
  Parse errors: No plan found in TAP output
t/plplot_library_tests.t (Wstat: 1024 Tests: 210 Failed: 4)
  Failed tests:  69, 71, 124-125
  Non-zero exit status: 4
Files=3, Tests=225, 42 wallclock secs ( 0.08 usr  0.01 sys + 18.27 cus
+r  2.41 csys = 20.77 CPU)
Result: FAIL
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As regards t/plplot.t:

$ perl -Mblib t/plplot.t
ok 1 - An object of class 'PDL::Graphics::PLplot' isa 'PDL::Graphics::
+PLplot'
ok 2 - Simple line plot
ok 3 - Simple line plot with LINEWIDTH specified
ok 4 - Symbol plot
ok 5 - Lines and symbols
ok 6 - Sample layer statistics plot
ok 7 - Setting pagesize
ok 8 - Line plot with gaps (plgapline)
ok 9 - Setting JUSTify = 1
ok 10 - Printing text inside and outside of plot window
ok 11 - Colored symbol plot with key
ok 12 - Colored symbol plot with key: reverse rainbow
ok 13 - Colored symbol plot with key, via low level interface
ok 14 - plgvpd call works correctly
ok 15 - plgvpw call works correctly
Segmentation fault (core dumped)
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Not sure how many tests t/plplot.t wants to run (no_plan), but ok() gets called more than 15 times.
At least the module is installable .... and usable, unless you want to utilize any of the features that are failing/segfaulting.

Cheers,
Rob

Issue 6 was "couldn't find c_plshade1". This was because plplot 5.14.0 deprecated it, and modern packagers don't add the flag to enable deprecated code. PDL::Graphics::PLplot 0.75+ uses the updated API and doesn't have this problem now.

In my error log I did not get Cannot find plplot library (libplplotd.so) I did get a few others that I am going to install. Cannot find hdf library, libdf.a. Cannot find GD library and Cannot find Proj library I am going to try cpan -i PDL::Graphics::PLplot to see if I get any different messages.

I did get a few others that I am going to install. Cannot find hdf library, libdf.a. Cannot find GD library and Cannot find Proj library

Those messages regarding missing libraries would have appeared during the building of the PDL module. When building the PDL module, no attempt is made to locate PLplot. You won't get to see Cannot find plplot library (libplplotd.so) until you attempt to build the PDL::Graphics::PLplot module (if libplplotd.so can't be found).

Having installed hdf, GD, and Proj you will then have to rebuild PDL in order for PDL to make use of those libraries. (I think cpan -fi PDL will provide you with that rebuild.)

I am going to try cpan -i PDL::Graphics::PLplot to see if I get any different messages.
Yes, I think that's probably the best approach.

Cheers,
Rob

I believe you are on to something here.