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Subject:	Re: [geda-user] [PATCH] Elements Window
From:	"Rob Spanton (rob AT robspanton DOT com) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com>
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Date:	Sat, 13 Feb 2016 14:02:06 +0000
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Hey Bert,=C2=A0

I wrote:
> You can find the patches I sent in the 'for-master/elementwin' branch
> of my clone of pcb

Bert Timmerman wrote:
> I pulled your branch and tried to build pcb to evaluate.
>=C2=A0
> It barfs on "g_object_class_install_properties" and=C2=A0
> "g_object_notify_by_pspec", both GObject-2.26 functions.

Ah, rats!

> As pcb still has a minimum version for Gtk of 2.18.? (released September=
=C2=A0
> 2009 ... March 2010) we happen to be a bit behind current development.

So it's GObject that's old on your system (Gtk might be too, but it's
not complaining about that).=C2=A0=C2=A0What platform are you building on?

There are two ways of solving it that I can see:

=C2=A01) Increase the version number of GLib required by pcb.=C2=A0=C2=A0(A=
dd a check
=C2=A0=C2=A0=C2=A0=C2=A0into the autotools stuff for this.)

=C2=A02) Rewrite to support older glib version.=C2=A0=C2=A0This can be comb=
ined with
=C2=A0=C2=A0=C2=A0=C2=A0the use of the GLIB_VERSION_MAX_ALLOWED [1] #define=
 to ensure that
=C2=A0=C2=A0=C2=A0=C2=A0it doesn't use any newer features.

Obviously option 1 would result it in it not building on your system
Bert.=C2=A0=C2=A0However, this is quite an old version of GLib, and stickin=
g to it
will prevent things like updates to Gtk 3 (which I have started having a
look into).

I've tried to determine what versions of glib the various distros are
currently shipping:

=C2=A0* Fedora 21: 2.42.2
=C2=A0* Fedora 22: 2.44.1
=C2=A0* Fedora 23: 2.46.2=C2=A0=C2=A0<--- What I'm using
=C2=A0* Ubuntu 12.04 LTS: 2.32.1
=C2=A0* Ubuntu 14.04 LTS: 2.40.0
=C2=A0* Debian Jessie: 2.42.1
=C2=A0* Debian Wheezy (Obsolete): 2.33.12

So as far as I can tell, there aren't really any current (or recently
current!) platforms that don't have GObject 2.26...=C2=A0=C2=A0I'm quite
interested to hear what you're running Bert!

> For the moment I pushed into "home/bert/element_window" and will have to
> look into if both issues can be solved.

I'm happy to help out with that.

Cheers,

Rob

[1] https://developer.gnome.org/glib/stable/glib-Version-Information.html#G=
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