Re: Gdk::RGBA

[Kjell Ahlstedt <kjell ahlstedt bredband net>]

I could not reproduce the error, because I haven't got everything 
installed that's necessary.

But I've found the probable root of the problem in the FAILEDTOBUILD.txt 
file. The command for compiling dialog_export.cpp is

g++ -c src/dialog_export.cpp -Wall `pkg-config gtkmm-3.0 gtkspell-2.0 
--cflags`-DHAVE_CONFIG_H -I./build/include -O2 -o build/o/dialog_export.o

I haven't got gtkspell-2.0 installed, but I can see at
http://git.gnome.org/browse/jhbuild/tree/modulesets/gnome-world-3.2.modules
that gtkspell version 2.0.16 depends on gtk+-2.
This means that `pkg-config gtkmm-3.0 gtkspell-2.0 --cflags` will add 
include options for both gtk+-2 and gtk+- 3, since gtkmm-3.0 depends on 
gtk+-3. That will make a mess of the header file inclusions. It's not 
possible to combine gtk+-2 and gtk+-3 (or for that matter gtkmm-2.x and 
gtkmm-3.0) in the same compilation or linking.

Probably the #include <gdk/gdk.h> directive in gtkmm/rgba.h has included 
the gdk/gdk.h from gtk+-2, which does not include gdk/gdkrgba.h.

error: ‘class Gtk::TextTag’ has no member named ‘property_foreground_rgba’
indicates that the preprocessor macro GLIBMM_PROPERTIES_ENABLED is not 
defined. I don't know if this is also a result of mixing incompatible 
code. Anyway that mix must be "unmixed" before it's meaningful to search 
for other causes of errors.

Regards
Kjell

2012-07-15 11:24, ahmet öztürk skrev:
> I haven't got a gtkmm 3.2 installation. I got those errors through
> launchpad build service:
> https://launchpadlibrarian.net/109778043/buildlog_ubuntu-oneiric-i386.lifeograph_0.9.0-1~ppa2~oneiric_FAILEDTOBUILD.txt.gz  and user questions: https://answers.launchpad.net/lifeograph/+question/201044
>
> Source code of the file that launchpad build log error refers to is
> here:
> http://bazaar.launchpad.net/~dmxe/lifeograph/trunk/view/head:/src/dialog_export.cpp
>
> However, there is no reference to RGBA in that very module which is
> strange.
>
>
> On Cts, 2012-07-14 at 22:01 +0200, Kjell Ahlstedt wrote:
> > Gdk::RGBA was added in gtkmm 3.0. It's available in all 3.x versions.
> >
> > I don't understand why you get those errors. Can you show a complete
> > (preferably short) source code file that gives such errors when compiled?
> >
> > Kjell
> >
> > 2012-07-14 10:10, ahmet öztürk skrev:
> > > Hi everybody,
> > >
> > > Although there is no hint about it neither on related reference page[1]
> > > nor new API list[2], I suspect that Gdk::RGBA was added to gtkmm in 3.4.
> > > Because, when we try to build code with RGBA against gtkmm 3.2, we get
> > > errors such as following:
> > >
> > > error: return type 'Gdk::RGBATraits::CType {aka struct _GdkRGBA}' is
> > > incomplete
> > >
> > > error: ‘class Gtk::TextTag’ has no member named
> > > ‘property_foreground_rgba’
> > >
> > > etc...
> > >
> > > Could someone please clarify?
> > >
> > > Kind regards,
> > >
> > > Ahmet
> > >
> > > [1] http://developer.gnome.org/gtkmm/stable/classGdk_1_1RGBA.html
> > > [2] http://developer.gnome.org/gtkmm/stable/since_3_4.html