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= Building Qt5 for the N900 (using scratchbox) =

Prerequisites:
* any scratchbox ARMEL target, tested with [[CSSU-thumb toolchain setup (gcc4.7.2-linaro)]]
* Xlib-xcb.h and libX11-xcb.so build from http://maemo.org/packages/source/view/fremantle_sdk_free_source/libx11/1.1.99.6+0m5 (build with --with-xcb) 
** We would need to deliver libX11.so.6 too, but --with-xcb breaks keyboard support for system apps
** Solution: we install a copy of libX11.so with XCB supoort, named libXc11.so and link against this copy, so system binaries don't load it (tested, works reliably) 
*** apt-get install libxc11-xcb-dev (with frafl's temporary Qt5 repo enabled, see [[Qt5-Maemo5]])
*** all "-lX11" (and "-lX11-xcb") in the Qt sources have been changed to "-lX'''c'''11" ("-lX'''c'''11-xcb" respectively)

=== Prepare your build environment ===
 #clone the repo
 git clone https://gitlab.com/qt5-maemo5/qt5-maemo5.git
 cd qt5-maemo5 && git remote set-url --push origin git@gitlab.com:qt5-maemo5/qt5-maemo5.git
 git checkout maemo5
 ./init-repository -f --module-subset=all
  cd qtbase && git remote set-url --push origin git@gitlab.com:qt5-maemo5/qt5-maemo5-qtbase.git && cd ..
  cd qtdeclarative && git remote set-url --push origin git@gitlab.com:qt5-maemo5/qt5-maemo5-qtdeclarative.git && cd ..  
  cd qtmaemo5 && git remote set-url --push origin git@gitlab.com:qt5-maemo5/qt5-maemo5-qtmaemo5.git && cd ..
  cd debian && ./setupdebianlinks.sh && cd ..
 #if you like to use the Thumb2 instructions check for -mthumb in QMAKE_CFLAGS
 vim qtbase/mkspecs/devices/linux-maemo-n900-g++/qmake.conf

=== Now it's time to configure ===
configure for a normal build within scratchbox (now standard)
  PKG_CONFIG_LIBDIR=/usr/lib/pkgconfig/ PKG_CONFIG_SYSROOT_DIR=/ ./configure -no-c++11 -developer-build -opensource -nomake examples -nomake tests -gtkstyle -confirm-license -device linux-maemo-n900-g++ -qt-xcb -make libs -prefix /opt/qt5

configure for a build '''outside of scratchbox''' instead (should still work, see wiki history for additional prerequisites)
 #-no-c++11 is only needed because of a single bug (related to gcc4.7?)
 ./configure -no-c++11 -developer-build -opensource -nomake examples -nomake tests -confirm-license -device linux-maemo-n900-g++ -device-option CROSS_COMPILE=/scratchbox/compilers/${COMPILER}/bin/arm-none-linux-gnueabi- -sysroot /scratchbox/users/${USER}/targets/${TARGET}/ -qt-xcb -make libs -prefix /opt/qt5

=== Finally, we build Qt ===
 make module-qtbase module-qtdeclarative
 #or, especially for additional modules, but works for base and declarative, too
 cd qtSOMEMODULE
 ../qtbase/bin/qmake
 make
 #if debianized (i.e. debian exists)
 dpkg-buildpackage -b
 #attention: no prober clean rules in debian (to save some time)
 #so remove debian/tmp to force prober reinstall

installation (build '''in''' scratchbox (s.a.))
 cd qtbase && fakeroot make install && cd ..
 cd qtjsbackend && fakeroot make install && cd ..
 cd qtsvg && fakeroot make install && cd .. 
 cd qtdeclarative && fakeroot make install && cd ..
 ln -s /opt/qt5/bin/qmake /usr/bin/qmake-qt5

=== Use Qt5 ===
If you like to compile any Qt program with the newly created Qt build
 ${GITROOT}/qtbase/bin/qmake
 #qmake already knows about sysroot and toolchain as configured above
 make
 #copy results to N900

Theoretically, you can even install this Qt build in scratchbox (untested):
 #only the first step should require root privileges
 ln -s  /scratchbox/users/${USER}/targets/${TARGET}/opt/qt5 /opt/qt5
 cd ${GITROOT}/qtbase && make install
 cd ${GITROOT}/qtdeclarative && make install
 cd ${GITROOT}/qtjsbackend && make install
 #... (some more as needed by qtdeclarative, e.g. qtsvg)
 /scratchbox/login
 #change target to the target TARGET
 cd /your/qt/program/
 /opt/qt5/bin/qmake
 make

= Building Qt5 for the N900 (using MADDE) =
'''Deprecated'''

Prerequisites:
* [[MADDE]]
* The same as for scratchbox

MADDEROOT=/opt/QtSDK/Maemo/4.6.2
 #see scratchbox
 git clone ...
 #-sysroots redirects everything to a path under ${MADDEROOT}
 ln -s `pwd` ${MADDEROOT}/sysroots/fremantle-arm-sysroot-20.2010.36-2-slim`pwd`
 #**Remove** -mthumb in QMAKE_CFLAGS (does not work with current MADDE)
 vim qtbase/mkspecs/devices/linux-maemo-n900-g++/qmake.conf

Now it's time to configure and build:
 #change if your host is not x86_64
 ./configure -developer-build -opensource -nomake examples -nomake tests -confirm-license -device linux-maemo-n900-g++ -device-option CROSS_COMPILE=${MADDEROOT}/toolchains/arm-2007q3-51sb6-gdb71-arm-none-linux-gnueabi_linux_x86_64/bin/arm-none-linux-gnueabi- -sysroot ${MADDEROOT}/sysroots/fremantle-arm-sysroot-20.2010.36-2-slim -qt-xcb -make libs -prefix /opt/qt5
 make module-qtbase module-qtdeclarative

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Editing Qt5-Maemo5/Development

@@ Line 50: / Line 50: @@
   cd qtdeclarative && fakeroot make install && cd ..
   ln -s /opt/qt5/bin/qmake /usr/bin/qmake-qt5
+=== Use Qt5 ===
+If you like to compile any Qt program with the newly created Qt build
+ ${GITROOT}/qtbase/bin/qmake
+ #qmake already knows about sysroot and toolchain as configured above
+ make
+ #copy results to N900
+Theoretically, you can even install this Qt build in scratchbox (untested):
+ #only the first step should require root privileges
+ ln -s  /scratchbox/users/${USER}/targets/${TARGET}/opt/qt5 /opt/qt5
+ cd ${GITROOT}/qtbase && make install
+ cd ${GITROOT}/qtdeclarative && make install
+ cd ${GITROOT}/qtjsbackend && make install
+ #... (some more as needed by qtdeclarative, e.g. qtsvg)
+ /scratchbox/login
+ #change target to the target TARGET
+ cd /your/qt/program/
+ /opt/qt5/bin/qmake
+ make
 = Building Qt5 for the N900 (using MADDE) =