[Buildroot] gtk+

[Buildroot] gtk+

[Thomas Petazzoni]

Hello Zoran,

Could you please post future questions about Buildroot directly on the
mailing list? I'm Cc'ing the list now.

Le Sat, 30 Jun 2012 01:58:42 -0700 (PDT),
Zoran Djordjevic <djdjdjole@yahoo.com> a ?crit :

> I recently read? some answer you put regarding gtkmm question. What make me
> interested in that answer was your declaration: "We already have gtk+ support
> in Buildroot...".
> My question is what should I check in menuconfig to enable gtk+ support ?

gtk+ requires:

 * A graphic backend, either DirectFB or X.org. The DirectFB backend is
   not very well maintained, so I'd say you'll probably have more luck
   with the X.org backend. So you have to enable a X.org server in
   your Buildroot configuration.

 * A toolchain with wide char support and C++ support.

These dependencies can be found by reading package/libgtk2/Config.in:

config BR2_PACKAGE_LIBGTK2
        bool "libgtk2"
	[...]
        depends on BR2_PACKAGE_XORG7||BR2_PACKAGE_DIRECTFB
        depends on BR2_USE_WCHAR # glib2
        depends on BR2_INSTALL_LIBSTDCPP # pango
        help
          The GTK+ version 2 graphical user interface library

Or by looking at the help text for BR2_PACKAGE_LIBGTK2 in menuconfig.

Hope this helps,

Thomas
-- 
Thomas Petazzoni, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com

[Buildroot] gtk+

[Sven Neumann]

On Tue, 2012-07-03 at 11:11 +0200, Thomas Petazzoni wrote:

> gtk+ requires:

>  * A toolchain with wide char support and C++ support.
> 
> These dependencies can be found by reading package/libgtk2/Config.in:
> 
> config BR2_PACKAGE_LIBGTK2
>         bool "libgtk2"
> 	[...]
>         depends on BR2_PACKAGE_XORG7||BR2_PACKAGE_DIRECTFB
>         depends on BR2_USE_WCHAR # glib2
>         depends on BR2_INSTALL_LIBSTDCPP # pango
>         help
>           The GTK+ version 2 graphical user interface library

I don't quite understand why pango needs C++ support though. As far as I
know it is written in plain C. The pango Config.in file refers to
freetype:

        depends on BR2_INSTALL_LIBSTDCPP # freetype support

But freetype itself doesn't depend on C++ support.


Regards,
Sven

[Buildroot] gtk+

[Thomas Petazzoni]

Le Tue, 03 Jul 2012 17:28:37 +0200,
Sven Neumann <s.neumann@raumfeld.com> a ?crit :

> I don't quite understand why pango needs C++ support though. As far as I
> know it is written in plain C. The pango Config.in file refers to
> freetype:
> 
>         depends on BR2_INSTALL_LIBSTDCPP # freetype support
> 
> But freetype itself doesn't depend on C++ support.

I haven't looked in details, but:

commit 1c4dbb5fa7df89731e5d59f680e9dc34f24f8835
Author: Peter Korsgaard <jacmet@sunsite.dk>
Date:   Mon Aug 30 10:02:39 2010 +0200

    pango: needs C++ for freetype handling
    
    Pango was recently updated to v1.28 as a dependency of webkit, but its
    freetype support has unfortunately been rewritten with parts in C++
    (since pango 1.25), so adjust dependencies of pango and users of it to
    require C++ support.

Regards,    

Thomas
-- 
Thomas Petazzoni, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com

[Buildroot] gtk+

[Peter Korsgaard]

>>>>> "Thomas" == Thomas Petazzoni <thomas.petazzoni@free-electrons.com> writes:

Hi,

 >> I don't quite understand why pango needs C++ support though. As far as I
 >> know it is written in plain C. The pango Config.in file refers to
 >> freetype:
 >> 
 >> depends on BR2_INSTALL_LIBSTDCPP # freetype support
 >> 
 >> But freetype itself doesn't depend on C++ support.

 Thomas> I haven't looked in details, but:

 Thomas> commit 1c4dbb5fa7df89731e5d59f680e9dc34f24f8835
 Thomas> Author: Peter Korsgaard <jacmet@sunsite.dk>
 Thomas> Date:   Mon Aug 30 10:02:39 2010 +0200

 Thomas>     pango: needs C++ for freetype handling

 Thomas>     Pango was recently updated to v1.28 as a dependency of
 Thomas>     webkit, but its freetype support has unfortunately been
 Thomas>     rewritten with parts in C++ (since pango 1.25), so adjust
 Thomas>     dependencies of pango and users of it to require C++
 Thomas>     support.

Ahh yes, the harfbuzz text shaping engine:

find -name \*.cc
./pango/opentype/hb-font.cc
./pango/opentype/hb-ot-layout.cc
./pango/opentype/main.cc

http://www.freedesktop.org/wiki/Software/HarfBuzz

-- 
Bye, Peter Korsgaard

[Buildroot] gtk+

[Sven Neumann]

Hi,

On Tue, 2012-07-03 at 21:07 +0200, Peter Korsgaard wrote:

>  Thomas> I haven't looked in details, but:
> 
>  Thomas> commit 1c4dbb5fa7df89731e5d59f680e9dc34f24f8835
>  Thomas> Author: Peter Korsgaard <jacmet@sunsite.dk>
>  Thomas> Date:   Mon Aug 30 10:02:39 2010 +0200
> 
>  Thomas>     pango: needs C++ for freetype handling
> 
>  Thomas>     Pango was recently updated to v1.28 as a dependency of
>  Thomas>     webkit, but its freetype support has unfortunately been
>  Thomas>     rewritten with parts in C++ (since pango 1.25), so adjust
>  Thomas>     dependencies of pango and users of it to require C++
>  Thomas>     support.
> 
> Ahh yes, the harfbuzz text shaping engine:
> 
> find -name \*.cc
> ./pango/opentype/hb-font.cc
> ./pango/opentype/hb-ot-layout.cc
> ./pango/opentype/main.cc
> 
> http://www.freedesktop.org/wiki/Software/HarfBuzz

Ah, indeed. Thanks for pointing this out.


Regards,
Sven