Imagen OPIE para tu FriendlyARM

En anteriores recetas escribí sobre cómo compilar e instalar u-boot en una tarjeta mini2440, cómo compilar Linux para la misma tarjeta y finalmente sobre como prepararle una bonita imagen Emdebian. Ahora, para terminar, vamos a compilar una imagen Opie haciendo uso de la toolchain OpenEmbedded.

Introducción

Requisitos para la creación de la imagen

Configuración de bitbake y compilación de Opie

javieralso@rigoberto:~$ mkdir -p OE/build/conf
javieralso@rigoberto:~$ cd OE/build/conf

# Use this to specify where BitBake should place the downloaded sources into
DL_DIR = "/home/javieralso/OE/sources"

# Delete the line below. Then specify which .bb files to consider for
# your build. Typically this will be something like BBFILES = "/path/to/openembedded/recipes/*/*.bb"
BBFILES := "/home/javieralso/OE/openembedded/recipes/*/*.bb"

# Use the BBMASK below to instruct BitBake to _NOT_ consider some .bb files
# This is a regulary expression, so be sure to get your parenthesis balanced.
#BBMASK = "bluez*"

# Uncomment this if you want to use a prebuilt toolchain. You will need to
# provide packages for toolchain and additional libraries yourself. You also
# have to set PATH in your environment to make sure BitBake finds additional binaries.
# ASSUME_PROVIDED += "virtual/${TARGET_PREFIX}gcc virtual/libc"

# Uncomment this if you're building for an arch that uses emulated locale
# generation under qemu (mainly arm glibc) and have an external gcc 3.x compiler
# that OE recognises. This will mean the gcc-native build is skipped, speeding
# builds up.
# ASSUME_PROVIDED += "gcc3-native"

# Uncomment this if you are building Linux 2.4 Embedix kernels.
# i.e. openzaurus-sa-2.4.18 and openzaurus-pxa-2.4.18 - and don't forget
# to rename the binaries as instructed in the Wiki.
# Most users do not need this anymore thankfully!
# ASSUME_PROVIDED += "virtual/arm-linux-gcc-2.95"

# Select between multiple alternative providers, if more than one is eligible.
PREFERRED_PROVIDERS = "virtual/qte:qte virtual/libqpe:libqpe-opie"
PREFERRED_PROVIDERS += " virtual/libsdl:libsdl-x11"
PREFERRED_PROVIDERS += " virtual/${TARGET_PREFIX}gcc-initial:gcc-cross-initial"
PREFERRED_PROVIDERS += " virtual/${TARGET_PREFIX}gcc-intermediate:gcc-cross-intermediate"
PREFERRED_PROVIDERS += " virtual/${TARGET_PREFIX}gcc:gcc-cross"
PREFERRED_PROVIDERS += " virtual/${TARGET_PREFIX}g++:gcc-cross"

# Uncomment this to specify where BitBake should create its temporary files.
# Note that a full build of everything in OpenEmbedded will take GigaBytes of hard
# disk space, so make sure to free enough space. The default TMPDIR is
# /tmp
# Don't use symlinks in in the path to avoid problems
# TMPDIR = /usr/local/projects/oetmp

# Uncomment this to specify a machine to build for. See the conf directory
# for machines currently known to OpenEmbedded. This will automatically take care
# of TARGET_ARCH
MACHINE = "mini2440"

# Use this to specify the target architecture. Note that this is only
# needed when building for a machine not known to OpenEmbedded. Better use
# the MACHINE attribute (see above)
# TARGET_ARCH = "arm"

# Use this to specify the target operating system.  The default is "linux",
# for a normal linux system with glibc. Set this to "linux-uclibc" if you want
# to build a uclibc based system.
# Normally the DISTRO of your choosing will take care of this
TARGET_OS = "linux"
# TARGET_OS = "linux-uclibc"

# Uncomment this to select a distribution policy. See the conf directory
# for distributions currently known to OpenEmbedded.
# Although it no longer contain version number in the (file-)name
# openzaurus-unstable is a so called "versioned"  distro, i.e. they
# explicitely select specific versions of various packages.
# Stay away from unversioned distros unless you really know what you are doing
DISTRO = "angstrom-2008.1"

# So far, angstrom.conf sets ENABLE_BINARY_LOCALE_GENERATION
# to generate binary locale packages at build time using qemu-native and
# thereby guarantee i18n support on all devices. If your build breaks on
# qemu-native consider disabling ENABLE_BINARY_LOCALE_GENERATION (note that
# this breaks i18n on devices with less than 128MB RAM) or installing
# a working third-party qemu (e.g. provided by your distribution) and
# adding qemu-native to ASSUME_PROVIDED. Caveat emptor, since third-party
# qemus lack patches needed to work with various OE targets.
ENABLE_BINARY_LOCALE_GENERATION = "1"
# ASSUME_PROVIDED += "qemu-native"

# If ENABLE_BINARY_LOCALE_GENERATION is set to "1", you can limit locales
# generated to the list provided by GLIBC_GENERATE_LOCALES. This is huge
# time-savior for developmental builds. Format: list of locale.encoding pairs
# with spaces as separators.
GLIBC_GENERATE_LOCALES = "es_ES.UTF-8"

# Uncomment this to select a particular major kernel version if the MACHINE setting
# supports more than one major kernel version. Currently this is suported by the
# following MACHINE types: poodle, tosa and simpad.
MACHINE_KERNEL_VERSION = "2.6"

# Uncomment one of these to build packages during the build process.
# This is done automatically if you set DISTRO (see above)
INHERIT = "package_ipk"
# INHERIT = "package_tar"

# Add the required image file system types below. Valid are
# jffs2, tar(.gz|bz2), cpio(.gz), cramfs, ext2(.gz), ext3(.gz)
# squashfs, squashfs-lzma
#IMAGE_FSTYPES = "jffs2 ext3"

# Uncomment this if you want to keep the temporary rootfs
# diretory, this can be useful during development.
# (Note that this rootfs is NOT usuable as NFS export.)
IMAGE_KEEPROOTFS = "1"

# Uncomment this to disable the parse cache (not recommended).
# CACHE = ""

# Uncomment this if you want BitBake to emit debugging output
# BBDEBUG = "yes"

# Uncomment these two if you want BitBake to build images useful for debugging.
# Note that INHIBIT_PACKAGE_STRIP needs a package format to be defined.
# Also note that OE now produces -dbg packages which contain debugging symbols.
# DEBUG_BUILD = "1"
# INHIBIT_PACKAGE_STRIP = "1"

# Uncomment these to build a package such that you can use gprof to profile it.
# NOTE: This will only work with 'linux' targets, not
# 'linux-uclibc', as uClibc doesn't provide the necessary
# object files.  Also, don't build glibc itself with these
# flags, or it'll fail to build.
#
# PROFILE_OPTIMIZATION = "-pg"
# SELECTED_OPTIMIZATION = "${PROFILE_OPTIMIZATION}"
# LDFLAGS =+ "-pg"

# Uncomment this to enable parallel make.
# This allows make to spawn mutliple processes to take advantage of multiple
# processors. Useful on SMP machines. This may break some packages - we're
# in the process of marking these so let us know if you find any.
# PARALLEL_MAKE = "-j 4"

# Uncomment to run multiple bitbake threads in parallel.
# Bitbake can do multiple jobs in parallel: Its a good idea make use of
# all available resources: e.g. to download sources while some other
# piece of software is compiled.
BB_NUMBER_THREADS = "2"

# Uncomment this if you want BitBake to emit the log if a build fails.
BBINCLUDELOGS = "yes"

# Specifies a location to search for pre-generated tarballs when fetching
# a cvs:// URI. Outcomment this, if you always want to pull directly from CVS.
#CVS_TARBALL_STASH = ""

# Uncomment this if you want to install shared libraries directly under their SONAME,
# rather than installing as the full version and symlinking to the SONAME.
# PACKAGE_SNAP_LIB_SYMLINKS = "1"

# EDIT THIS FILE and then remove the line below before using!
#REMOVE_THIS_LINE:="${@bb.fatal('Read the comments in your conf/local.conf')}"

• DL_DIR: Especifica la ruta en la que se guardarán todas las fuentes que se descarguen y sus parches, para después compilarlas.
• BBFILES: Lugar en el el que se encuentran los archivos de tareas para bitbake (con extensión .bb). Dentro de éste directorio hay un subdirectorio por paquete a compilar, en el cual se encuentran los *.bb que dirigirán la compilación.
• BBMASK: Paquetes que NO serán compilados (se pueden expresar como una Expresión Regular). Desaconsejo totalmente descomentar ésta línea, puesto que aunque haya paquetes que a priori nos parezca que no serán útiles, éstos pueden representar dependencias que detendrán la compilación (y la compilación puede tardar hasta 36 horas según la máquina que utilices, así que "fastidia" bastante que ésto suceda a mitad del proceso).
• MACHINE: Máquina destino para la que se va a compilar.

javieralso@rigoberto:~/OE$
javieralso@rigoberto:~$ git clone http://repo.or.cz/r/openembedded.git
javieralso@rigoberto:~$ export BBPATH=~/OE/build:~/OE/openembedded

javieralso@rigoberto:~/OE$ bitbake opie-image

NOTE: Running task 4827 of 4834 (ID: 39, /home/javieralso/OE/openembedded/recipes/ipkg-utils/ipkg-utils-native_1.6+cvs20050404.bb, do_package_stage)
NOTE: Running task 4828 of 4834 (ID: 23, /home/javieralso/OE/openembedded/recipes/quilt/quilt-native_0.48.bb, do_qa_staging)
NOTE: Running task 4829 of 4834 (ID: 18, /home/javieralso/OE/openembedded/recipes/images/opie-image.bb, do_package_update_index_ipk)
NOTE: Running task 4830 of 4834 (ID: 25, /home/javieralso/OE/openembedded/recipes/quilt/quilt-native_0.48.bb, do_package_stage)
NOTE: Running task 4831 of 4834 (ID: 15, /home/javieralso/OE/openembedded/recipes/images/opie-image.bb, do_distribute_sources)
NOTE: Running task 4832 of 4834 (ID: 7, /home/javieralso/OE/openembedded/recipes/images/opie-image.bb, do_package_stage_all)
NOTE: Running task 4833 of 4834 (ID: 14, /home/javieralso/OE/openembedded/recipes/images/opie-image.bb, do_rootfs)
NOTE: Running task 4834 of 4834 (ID: 8, /home/javieralso/OE/openembedded/recipes/images/opie-image.bb, do_build)
NOTE: Tasks Summary: Attempted 4834 tasks of which 0 didn't need to be rerun and 0 failed.
javieralso@fry:~/OE$

Instalación

javieralso@rigoberto:~/kernel/mini2440# sudo make INSTALL_MOD_PATH=/media/rootfs/  O=../kernel-bin/ modules_install
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Lots and lots of INSTALL messages
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Referencias

• Opie
• OpenEmbedded
• Doing a build with bitbake