`make check` (repo_test.sh) fails with plplot 5.11

[Jari Häkkinen]

The reason for this is that plplot issues a warning to stderr

*** PLPLOT WARNING ***
All pages after the first skipped because family file output not specified.

The statement is correct since we do not want family file output. Explicitly turning of ​familying does not remove the warning message. A consequence of turning on familying is that all generated graphics files will have changed names.

[Peter Johansson]

So we need to ignore that warning.

replace line

test -e stderr || exit_fail

with something like

grep -v 'PLPLOT WARNING' stderr \
| grep -v '^All pages after the first skipped because' \
&& exit_fail

[Jari Häkkinen]

plplot released 5.11.1 yesterday that fixes the problem with the spurious warning message. I cannot pinpoint to what caused the message but it is gone.

Should we simply ignore this issue and maybe add an note somewhere as a known issue?

[Peter Johansson]

A note in the test should suffice.

[Jari Häkkinen]

(In [1589]) Addresses #533. Added note to say that the test will fail with plplot 5.11.0

[Jari Häkkinen]

We'll ignore the failed test for plplot 5.11.0.