QtMoko/CrossBuildingOnDebian
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Cross-building QtMoko on Debian
It is possible to cross-build QtMoko on a Debian box using only (em)debian tools.
On my Zotac ZBox (amd64) the whole build takes just less than five hours.
Tools needed
The builds are done the Debian way, using pbuilder on a Debian Wheezy box. Most of the magic is handled by the pdebuild-cross package:
$ sudo apt-get install pdebuild-cross
The toolchain comes from the Emdebian project and is set up via the multistrap package (pulled in by pdebuild-cross).
Building QtMoko v36
Configuration
Configuration file for multistrap (/etc/multistrap/armel-sid.conf):
[General] arch= directory= # same as --tidy-up option if set to true cleanup=true # same as --no-auth option if set to true # keyring packages listed in each debootstrap will # still be installed. noauth=false # whether to add the /suite to be explicit about where apt # needs to look for packages. Default is false. explicitsuite=true # extract all downloaded archives (default is true) unpack=true omitrequired=false configscript= setupscript=/usr/share/multistrap/setcrossarch.sh debootstrap=Debian Toolchains aptsources=Debian Toolchains tarballname=pdebuild-cross.tgz [Toolchains] packages=g++-4.4-arm-linux-gnueabi linux-libc-dev-armel-cross reinstall=binutils-multiarch source=http://www.emdebian.org/debian keyring=emdebian-archive-keyring suite=squeeze [Debian] packages=dpkg-dev binutils-multiarch build-essential dpkg-cross makedev # Choose your preferred mirror source=http://ftp.fr.debian.org/debian keyring=debian-archive-keyring suite=unstable omitdebsrc=false
Configuration file for pdebuild-cross (/etc/pdebuild-cross/pdebuild-cross.rc):
# this is your configuration file for pdebuild-cross. # /etc/pdebuild-cross/pdebuild-cross.rc is the one meant for editing. # # read pbuilderrc (5) and pdebuild-cross (1) for notes on specific options. # remember to change CROSSARCH, DEBBUILDOPTS and MULTISTRAPFILE to # change your target cross-building architecture from armel. CROSSARCH=armel DEBBUILDOPTS="-aarmel" MULTISTRAPFILE=/etc/multistrap/armel-sid.conf #BASETGZ=/var/lib/pdebuild-cross/pdebuild-cross.tgz BASETGZ=/home/pdebuild-cross.tgz BUILDPLACE=/var/lib/pdebuild-cross/build/ BUILDRESULT=.. APTCACHE=/var/lib/pdebuild-cross/aptcache/ APTCACHEHARDLINK=no PBUILDERSATISFYDEPENDSCMD=/usr/sbin/embuilddeps PBUILDERSATISFYDEPENDSOPT="-m -a armel" USEDEVPTS=yes AUTO_DEBSIGN=no # Only use when testing Xorg apps, not when building # also remember to copy ~/.Xauthority into /home/$SUDO_USER/ # (mkdir /home/$SUDO_USER if necessary). #BINDMOUNTS="/tmp"
Creating the pbuilder chroot
As simple as:
$ sudo pdebuild-cross-create $ sudo pdebuild-cross-update
Setting up the git workspace
First clone the QtMoko repo:
$ git clone --recursive git://github.com/radekp/qtmoko.git
Check out the v36 tag:
$ cd qtmoko $ git checkout v36
Patch the debian files
$ wget -O - -c http://wiki.openmoko.org/images/0/0a/QtMoko-v36-pdebuild-cross-patch.txt | patch -p1
Building the QtMoko package
Create the orig tarball (once after each git merge):
$ tar czf ../qtmoko_36.orig.tar.gz -C .. --exclude .git --exclude .pc --exclude qtmoko/debian --transform 's:\./qtmoko:qtmoko-36:' ./qtmoko
Build:
$ pdebuild-cross -aarmel
Building QtMoko v35
QtMoko v35 is the trickiest case since it requires a Debian Squeeze pbuilder chroot which misses the xapt tool. Hopefully an official backport will be available soon. For now I use a backport sitting in my own repository.
Configuration
Configuration file for multistrap (/etc/multistrap/armel-squeeze.conf):
[General] arch= directory= # same as --tidy-up option if set to true cleanup=true # same as --no-auth option if set to true # keyring packages listed in each debootstrap will # still be installed. noauth=false # whether to add the /suite to be explicit about where apt # needs to look for packages. Default is false. explicitsuite=true # extract all downloaded archives (default is true) unpack=true omitrequired=false configscript= setupscript=/usr/share/multistrap/setcrossarch.sh debootstrap=Debian Toolchains aptsources=Debian Toolchains tarballname=pdebuild-cross.tgz [Toolchains] packages=g++-4.4-arm-linux-gnueabi linux-libc-dev-armel-cross reinstall=binutils-multiarch source=http://www.emdebian.org/debian keyring=emdebian-archive-keyring suite=squeeze [Debian] packages=dpkg-dev binutils-multiarch build-essential makedev wget # Choose your preferred mirror source=http://ftp.fr.debian.org/debian keyring=debian-archive-keyring suite=squeeze omitdebsrc=false
Hook file for multistrap so that it installs the xapt backport for squeeze from my repository (/etc/multistrap/armel-squeeze-hooks/E10-xapt):
#!/bin/sh set -e if [ ! -f /usr/bin/xapt ]; then wget http://pini.free.fr/debian/pool/main/e/emdebian-crush/xapt_2.2.17~stable_all.deb dpkg -i xapt_2.2.17~stable_all.deb || apt-get -f -y install rm xapt_2.2.17~stable_all.deb fi
This file must be executable (chmod a+x).
Configuration file for pdebuild-cross (/etc/pdebuild-cross/pdebuild-cross.rc):
# this is your configuration file for pdebuild-cross. # /etc/pdebuild-cross/pdebuild-cross.rc is the one meant for editing. # # read pbuilderrc (5) and pdebuild-cross (1) for notes on specific options. # remember to change CROSSARCH, DEBBUILDOPTS and MULTISTRAPFILE to # change your target cross-building architecture from armel. CROSSARCH=armel DEBBUILDOPTS="-aarmel" MULTISTRAPFILE=/etc/multistrap/armel-squeeze.conf #BASETGZ=/var/lib/pdebuild-cross/pdebuild-cross.tgz BASETGZ=/home/pdebuild-cross.tgz BUILDPLACE=/var/lib/pdebuild-cross/build/ BUILDRESULT=.. APTCACHE=/var/lib/pdebuild-cross/aptcache/ HOOKDIR=/etc/multistrap/armel-squeeze-hooks APTCACHEHARDLINK=no PBUILDERSATISFYDEPENDSCMD=/usr/sbin/embuilddeps PBUILDERSATISFYDEPENDSOPT="-m -a armel" USEDEVPTS=yes AUTO_DEBSIGN=no # Only use when testing Xorg apps, not when building # also remember to copy ~/.Xauthority into /home/$SUDO_USER/ # (mkdir /home/$SUDO_USER if necessary). #BINDMOUNTS="/tmp"
You may want to change the BUILDPLACE path as well in case you're short of space in /var.
Creating the pbuilder chroot
As simple as:
$ sudo pdebuild-cross-create $ sudo pdebuild-cross-update
The second step will trigger the xapt installation through the E10-xapt hook script defined above.
Setting up the git workspace
First clone the QtMoko repo:
$ git clone --recursive git://github.com/radekp/qtmoko.git
Check out the v35 tag:
$ cd qtmoko $ git checkout v35
Patch the debian files
$ wget -O - -c http://wiki.openmoko.org/images/f/f6/QtMoko-v35-pdebuild-cross-patch.txt | patch -p1
Building the QtMoko package
Create the orig tarball (once after each git merge):
$ tar czf ../qtmoko_35.orig.tar.gz -C .. --exclude .git --exclude .pc --exclude qtmoko/debian --transform 's:\./qtmoko:qtmoko-35:' ./qtmoko
Build:
$ pdebuild-cross -aarmel