On 2019-01-04 11:47+0530 Tom Schoonjans wrote:
Hi all,
I ran into the same problem a couple of weeks ago. It is in fact a bug in pango
1.43.0 which uses meson as buildsystem instead of autotools, and the pkg-config
issue was introduced in the transition.
I reported this as a bug
<https://gitlab.gnome.org/GNOME/pango/merge_requests/22#note_390137> and submitted a
patch <https://gitlab.gnome.org/GNOME/pango/merge_requests/38>, which is now in
master and should end up in 1.44 (or possibly in 1.43.1 if this ever gets released).
In the meantime, the problem can be fixed by executing:
echo "Requires: gobject-2.0" >> /mingw64/lib/pkgconfig/pango.pc
followed by building plplot… The cairo backend should build fine then.
Thanks, Tom, for that really helpful comment about what appears to be a
widespread issue with pango 1.43.0. That's a heavily used free
library. So let's hope the upstream pango developers quickly release
1.43.1 with your fix and that quickly propagates to free software
distributions for Linux (thousands of them), Mac OS X (fink, macports,
and homebrew), and Windows (Cygwin and MinGW-w64/MSYS2).
@Günter:
So to summarize, it looks like my recent tests on Debian Testing have
been fine because I have installed cairo 1.42.3, and that platform has
not (yet) got around to packaging cairo-1.43.0. Arjen's test was also
a success because he has cairo 1.42.1 currently installed (and has not
yet updated his system), but your recent test failed because you did
do such an update which exposed you to the bad pango 1.43.0 version.
So hopefully Tom's above echo command will sort out the issue for you
until upstream developers fix the issue, and that fix propagates to
MinGW-w64/MSYS2.
At the same time, I also stand by my advice to drop "MinGW Makefiles"
and mingw32-make and use the "Unix Makefiles" or "MSYS Makefiles"
generators and bash and make instead simply because if you ever run
into PLplot trouble with the platform, the very much enhanced test
capability (via bash scripts) you have access to with the latter
method can be quite useful, e.g., the report tarball that can
be generated for that case makes it much easier to
understand your bug reports.
@Arjen: you will likely also be affected by the same bug and have to do the
same fix
when you update your own MinGW-w64/MSYS2.
And I will likely be affected by the same bug if Debian Testing starts packaging
pango 1.43.0.
Alan
__________________________
Alan W. Irwin
Programming affiliations with the FreeEOS equation-of-state
implementation for stellar interiors (freeeos.sf.net); the Time
Ephemerides project (timeephem.sf.net); PLplot scientific plotting
software package (plplot.sf.net); the libLASi project
(unifont.org/lasi); the Loads of Linux Links project (loll.sf.net);
and the Linux Brochure Project (lbproject.sf.net).
__________________________
Linux-powered Science
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