[zz]Cross-compiling GTK+ over DirectFB

popy

This guide explains how to cross-compile GTK+ over DirectFB.
Intro
This guide is based in the wiki
GTK on DirectFB for Embedded Systems
from the
DirectFB
site, but it uses the latest packages available to this date. Since
this procedure has some unstable packages and is still experimental,
it’s not in the mentioned wiki. Hopefully, once this procedure becomes
stable, the wiki will be updated.
I tested this procedure in a STMicroelectronics ST40 processor (SH
architecture). If you’re using this processor, this is the
configuration I have:

• Board: STB7109 cut 3.0, also called cocoref_gold_7109
• Linux distribution: STLinux 2.2
• ST drivers and API: STFAE A16

Warnings

This documentation assumes you already have DirectFB install in $PREFIX/usr. Change it accordingly to your installation.

This documentation is still a work in progress, some steps of this
procedure could be useless, ugly and/or dangerous. In order to make
this procedure easier, it might be that there is the need of some
patches.

The autotools are not very user-friendly when cross-compiling,
thus, several configure files and Makefile (that are generated by the
autotools) have to be edited by hand.

This procedure uses unstable or development versions of some
packages like Glib and Cairo. However, the procedure should be the same
for the latest stable release.

GTK+ and all the packages underneath need a considerable amount of
space and processor. If your embedded device provides a
hard-drive/compact-flash and supports hardware accelerated graphics you
can use GTK+ without problems.
Requirements
Typically, when developing applications for an embedded system a
cross-toolchain is needed. If you already have a cross-toolchain you
don’t have to worry about building it yourself. Otherwise, a well known
resource for building one is
http://www.kegel.com/crosstool
When developing for embedded systems, there are very few Linux
distributions or packages that contain all the required software for
building GTK+, therefore you have to build everything from scratch.
The order in which the packages are compiled is important since some
of them won’t compile without the others. The packages, their versions
and the order used for building GTK+ are the following:

• Glib  from git repository 15/02/08
• atk-1.20.0
• freetype-2.3.5
• zlib-1.2.3
• libxml2-2.6.30
• fontconfig-2.5.0
• libpng-1.2.24
• Pixmap  from git repository 15/02/08
• Cairo  from git repository 15/02/08
• pango-1.19.2
• gtk+-2.12.3

Environment configuration
Suppose that the libraries will be installed in
/opt/gtkdfb/usr/local (may be /opt/gtkdfb is the root fs of your
embedded target) and that the cross-toolchain (compiler, linker…) is in
your path.
Set the following environment variables that will make our life easier:
$ export PREFIX=/opt/gtkdfb/usr/local
$ export LD_LIBRARY_PATH=$PREFIX/lib
$ export PKG_CONFIG_PATH=$LD_LIBRARY_PATH/pkgconfig
$ export COMPILER=sh4-linux-gcc
$ export HOST=sh4-linux
$ export BUILD=i386-linux
$ export STRIP=sh4-linux-strip
Building GTK+ and its requirements
Glib
Edit the “configure” file:
Search for the texts “cannot run test program while cross compiling”
and “cross-compiling”. Remove the following code that appears a couple
of lines below the searched texts:
{ (exit 1); exit 1; };
Compile and install:
$ CC=$COMPILER ./configure –build=$BUILD –host=$HOST –prefix=$PREFIX \
–disable-selinux –disable-fam –disable-largefile –enable-debug=no –disable-gtk-doc \
–disable-man
$ make
$ make install
Atk
Compile and install:
$ CC=$COMPILER ./configure –host=$HOST –build=$BUILD –prefix=$PREFIX \
–disable-glibtest –disable-gtk-doc
$ make
$ make install
Freetype
Compile and install:
$ CC=$COMPILER ./configure –host=$HOST –build=$BUILD –prefix=$PREFIX
$ make
$ make install
Zlib
Compile and install:
$ CC=$COMPILER ./configure –prefix=$PREFIX –shared
$ make
$ make install
libxml2
Compile and install:
$ CC=$COMPILER ./configure –host=$HOST –build=$BUILD –prefix=$PREFIX \
–without-debug
$ make
$ make install
Fontconfig
Change the value of the flag –with-arch according to your architecture.
Compile and install:
$ CC=$COMPILER ./configure –build=$BUILD –host=$HOST –prefix=$PREFIX \
–with-freetype-config=$PREFIX/bin/freetype-config \
–enable-libxml2 –with-arch=sh4 –disable-docs
$ make
$ make install
libpng
Edit the “configure” file:
Set to ‘yes’ the following variable:
ac_cv_lib_z_zlibVersion=yes
Compile and install:
$ CC=$COMPILER ./configure –host=$HOST –build=$BUILD –prefix=$PREFIX
$ make
$ make install
Pixman
Compile and install:
$ CC=$COMPILER ./autogen.sh –host=$HOST –build=$BUILD –prefix=$PREFIX
$ make
$ make install
Cairo
Compile and install:
$ CC=$COMPILER \
directfb_CFLAGS=”-I$PREFIX/../include/directfb” \
directfb_LIBS=”$PREFIX/../lib/libdirectfb.so \
$PREFIX/../lib/libdirect.so \
$PREFIX/../lib/libfusion.so” \
png_CFLAGS=”-I$PREFIX/include” \
png_LIBS=$PREFIX/lib/libpng12.so \
FONTCONFIG_CFLAGS=”-I$PREFIX/include/fontconfig” \
FONTCONFIG_LIBS=$PREFIX/lib/libfontconfig.so \
FREETYPE_CFLAGS=”-I$PREFIX/include/freetype2″ \
FREETYPE_LIBS=$PREFIX/lib/libfreetype.so \
./configure –host=$HOST –build=$BUILD –prefix=$PREFIX \
–enable-directfb=yes –without-x –disable-xlib –disable-xlib-xrender \
–disable-win32 –enable-pdf=no –enable-ps=no –enable-png
$ make
$ make install
Pango
Configure:
$ CC=$COMPILER \
GLIB_CFLAGS=”-I$PREFIX/include/glib-2.0 \
-I$PREFIX/lib/glib-2.0/include” \
GLIB_LIBS=”$PREFIX/lib/libglib-2.0.so \
$PREFIX/lib/libgmodule-2.0.so \
$PREFIX/lib/libgobject-2.0.so \
$PREFIX/lib/libfontconfig.so \
$PREFIX/lib/libxml2.so \
$PREFIX/lib/libfreetype.so” \
CAIRO_CFLAGS=”-I$PREFIX/include/cairo” \
CAIRO_LIBS=$PREFIX/lib/libcairo.so \
FONTCONFIG_CFLAGS=”-I$PREFIX/include/fontconfig” \
FONTCONFIG_LIBS=$PREFIX/lib/libfontconfig.so \
FREETYPE_CFLAGS=”-I$PREFIX/include/freetype2″ \
FREETYPE_LIBS=$PREFIX/lib/libfreetype.so \
FREETYPE_CONFIG=$PREFIX/bin/freetype-config \
./configure –host=$HOST –build=$BUILD –prefix=$PREFIX \
–without-x
Edit the examples/Makefile:
Add to the GLIB_LIBS variable the following:
/opt/gtkdfb/usr/local/lib/libpng12.so \
/opt/gtkdfb/usr/lib/libdirectfb.so \
/opt/gtkdfb/usr/lib/libdirect.so \
/opt/gtkdfb/usr/lib/libfusion.so
Edit the tests/Makefile:
Set the LIBS variables to the following value:
LIBS = $(GLIB_LIBS)
Compile and install:
$ gmake
$ gmake install
GTK+
Configure:
$ CC=$COMPILER \
BASE_DEPENDENCIES_CFLAGS=”-I$PREFIX/include \
-I$PREFIX/lib/glib-2.0/include -I$PREFIX/include/glib-2.0 \
-I$PREFIX/include/pango-1.0 \
-I$PREFIX/include/cairo \
-I$PREFIX/include/atk-1.0″ \
BASE_DEPENDENCIES_LIBS=”-L$PREFIX/lib \
$PREFIX/lib/libglib-2.0.so \
$PREFIX/lib/libgobject-2.0.so $PREFIX/lib/libgmodule-2.0.so \
$PREFIX/lib/libfontconfig.so $PREFIX/lib/libxml2.so” \
GLIB_CFLAGS=”-I$PREFIX/include \
-I$PREFIX/lib/glib-2.0/include \
-I$PREFIX/include/glib-2.0″ \
GLIB_LIBS=”-L$PREFIX/lib \
$PREFIX/lib/libglib-2.0.so \
$PREFIX/lib/libgobject-2.0.so \
$PREFIX/lib/libgmodule-2.0.so \
$PREFIX/lib/libfontconfig.so \
$PREFIX/lib/libxml2.so” \
PANGO_CFLAGS=”-I$PREFIX/include/pango-1.0″ \
PANGO_LIBS=”-L$PREFIX/lib \
$PREFIX/lib/libpango-1.0.so \
$PREFIX/lib/libpangoft2-1.0.so \
$PREFIX/lib/libpangocairo-1.0.so” \
GDK_DEP_CFLAGS=”-pthread -I$PREFIX/include/glib-2.0 \
-I$PREFIX/lib/glib-2.0/include \
-I$PREFIX/include/pango-1.0 \
-I$PREFIX/include/cairo \
-I$PREFIX/include \
-D_REENTRANT -D_GNU_SOURCE \
-I$PREFIX/../include \
-I$PREFIX/../include/directfb” \
GDK_DEP_LIBS=”-L$PREFIX/lib -lpthread -ldl -lpangocairo-1.0 \
-lpango-1.0 -lcairo -lgobject-2.0 -lgmodule-2.0 -lglib-2.0 -lpng12 -lm \
$PREFIX/../lib/libdirectfb.so \
$PREFIX/../lib/libdirect.so \
$PREFIX/../lib/libfusion.so” \
GDK_PIXBUF_DEP_CFLAGS=”-pthread -I$PREFIX/include/glib-2.0 \
-I$PREFIX/lib/glib-2.0/include \
-I$PREFIX/include \
-I$PREFIX/../include” \
GDK_PIXBUF_DEP_LIBS=”-L$PREFIX/lib \
-lgmodule-2.0 -ldl -lgobject-2.0 -lglib-2.0 -lpng12 -lm” \
GTK_DEP_CFLAGS=”-pthread -I$PREFIX/include/glib-2.0 \
-I$PREFIX/lib/glib-2.0/include \
-I$PREFIX/include/pango-1.0 \
-I$PREFIX/include/cairo \
-I$PREFIX/include -D_REENTRANT -D_GNU_SOURCE \
-I$PREFIX/../include/directfb \
-I$PREFIX/include/atk-1.0 \
-I$PREFIX/../include” \
GTK_DEP_LIBS=”-L$PREFIX/lib \
-lpangocairo-1.0 -lpango-1.0 -latk-1.0 -lgobject-2.0 -lgmodule-2.0 \
-ldl -lglib-2.0 -lcairo -lpng12 -lm \
$PREFIX/../lib/libdirectfb.so \
$PREFIX/../lib/libdirect.so \
$PREFIX/../lib/libfusion.so” \
GDK_EXTRA_CFLAGS=”-I$PREFIX/../include” \
GDK_EXTRA_LIBS=”-L$PREFIX/../lib -lz -lpthread -ldl \
$PREFIX/../lib/libdirectfb.so \
$PREFIX/../lib/libdirect.so \
$PREFIX/../lib/libfusion.so” \
./configure \
–host=$HOST \
–build=$BUILD \
–prefix=$PREFIX \
–with-gdktarget=directfb \
–without-libtiff \
–disable-glibtest \
–disable-largefile \
–disable-modules \
–with-included-loaders=gif,jpeg,png,xpm
Dangerous/ugly step:
GTK needs a cairo-pdf/ps printing support for compiling, but it’s
unlikely that PDF/PS will be needed in an embedded system. There is no
flag to compile it without this setting. There are some patches in
development to solve this issue, meanwhile it was compiled without the
cairo-pdf support by doing the following very ugly and dangerous step.
If you want to add to add PDF/PS support you can try
Poppler
.
Edit the files:

• gtk/gtkprintoperation.c
• gtk/gtkprintoperation-unix.c
• modules/printbackends/lpr/gtkprintbackendlpr.c
• modules/printbackends/file/gtkprintbackendfile.c

Comment the lines in all these files that contains the following includes or function calls:
#include
#include
cairo_pdf_surface_set_size()
cairo_pdf_surface_create()
cairo_ps_surface_create_for_stream()
Compile and install:
$ make
$ make install
That’s it.
Keep in mind that this procedure is still experimental and uses
unstable versions of Glib and Cairo. In fact, with a stable version of
Cairo, there’s no need for compiling Pixman because it’s already
included in Cairo.
Any help, suggestions and/or ideas are welcome.
BTW:http://www.paguilar.org/blog/?cat=4


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