Buildroot: fast deployment of embedded systems - Mind
Buildroot: fast deployment of embedded systems - Mind
Buildroot: fast deployment of embedded systems - Mind
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<strong>Buildroot</strong>:<br />
<strong>fast</strong> <strong>deployment</strong><br />
<strong>of</strong> <strong>embedded</strong> <strong>systems</strong><br />
© 2012 Essensium N.V.<br />
Parts © Thomas Petazzoni, Free Electrons<br />
This work is licensed under a<br />
Creative Commons Attribution-ShareAlike 3.0<br />
Unported License<br />
http://www.mind.be/content/121028_<strong>Buildroot</strong>-Fast-Deployment.pdf
Image © Coolblue N.V.
Image © Atmel<br />
Deploy a board<br />
into the system
Deploy s<strong>of</strong>tware<br />
on the board
<strong>Buildroot</strong>:<br />
<strong>fast</strong> <strong>deployment</strong><br />
<strong>of</strong> <strong>embedded</strong> <strong>systems</strong><br />
© 2012 Essensium N.V.<br />
Parts © Thomas Petazzoni, Free Electrons<br />
This work is licensed under a<br />
Creative Commons Attribution-ShareAlike 3.0<br />
Unported License<br />
http://www.mind.be/content/121028_<strong>Buildroot</strong>-Fast-Deployment.pdf
Fast <strong>deployment</strong> with buildroot<br />
1.<strong>Buildroot</strong> makes it easy<br />
to get the board running<br />
2.How to use buildroot in real life<br />
(demonstration)<br />
3.Comparison with other projects
Build infrastructure<br />
is needed for <strong>fast</strong> <strong>deployment</strong><br />
●<br />
●<br />
●<br />
●<br />
●<br />
●<br />
Initial default <strong>deployment</strong> in no time<br />
Fast building<br />
Easy to change configuration<br />
Share with colleagues<br />
Reproducible<br />
Easy to add "packages"
http://buildroot.org<br />
●<br />
●<br />
●<br />
●<br />
●<br />
Kconfig-based interactive configuration<br />
Makefile-based build system<br />
Download, build and install<br />
Patch (cross-compilation fixes)<br />
Toolchain (compiler, library)<br />
– Packages + dependencies<br />
– Boot loader (U-Boot, barebox, grub, ...)<br />
– Linux kernel<br />
– Host tools (openocd, dfu-util, ...)<br />
● Create root filesystem (ext2, jffs2, ubi, ...)
<strong>Buildroot</strong> has a simple workflow<br />
/etc/init.d/S80startapp<br />
/etc/network/interfaces<br />
Makefiles<br />
Kconfigs<br />
patches<br />
make xconfig;<br />
make<br />
libraries<br />
kernel<br />
patches<br />
root<br />
filesystem<br />
Image © Marcello Jo
<strong>Buildroot</strong> deploys on EVM<br />
in no time
<strong>Buildroot</strong> makes it easy<br />
to change the configuration
<strong>Buildroot</strong> makes it easy<br />
to change the configuration
<strong>Buildroot</strong> makes it easy<br />
to change the configuration<br />
make linux-xconfig
<strong>Buildroot</strong> makes it easy<br />
to share with colleagues<br />
Set BR2_DEFCONFIG and BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE<br />
make update-all-config
<strong>Buildroot</strong> is reproducible<br />
●<br />
Configuration files (make update-all-config)<br />
are all that is needed to re-create<br />
exactly the same build<br />
●<br />
Sources can be collected with make source<br />
●<br />
Licenses can be collected with make legal-info
<strong>Buildroot</strong> has conventions<br />
for where to store config<br />
Board configuration goes in board directory:<br />
board//<br />
<strong>Buildroot</strong> configuration goes in configs directory:<br />
configs/_defconfig
<strong>Buildroot</strong> makes it easy<br />
to hack a package<br />
LINUX_OVERRIDE_SRCDIR = /home/arnout/src/linux<br />
make linux-rebuild
<strong>Buildroot</strong> makes it easy<br />
package/foo/foo.mk<br />
to add packages<br />
BR2_PACKAGE_FOO = y<br />
FOO_OVERRIDE_SRCDIR = …/foo<br />
FOO_DEPENDENCIES = opencv libusb<br />
define FOO_BUILD_CMDS<br />
$(TARGET_MAKE_ENV) $(MAKE) -C $(@D)<br />
endef<br />
define FOO_INSTALL_TARGET_CMDS<br />
$(INSTALL) -D -m 0755 $(@D)/foo \<br />
$(TARGET_DIR)/usr/bin/foo<br />
endef<br />
$(eval $(generic-package))
<strong>Buildroot</strong> makes it easy<br />
to cross-compile your source<br />
Use /output/host/usr/-gcc<br />
as the cross-compiler<br />
– Automatically uses cross-include and library paths<br />
– Use /output/host/usr/pkg-config<br />
to get package-specific cflags and ldflags<br />
Cross-build environment can be shared<br />
by setting BR2_HOST_DIR
●<br />
Documentation:<br />
– make help<br />
– make manual<br />
<strong>Buildroot</strong> has good support<br />
– http://buildroot.net/downloads/manual/manual.html<br />
●<br />
Mailing list:<br />
– buildroot@busybox.net<br />
– 40 mails per day (mostly patches)<br />
●<br />
●<br />
●<br />
Release every 3 months<br />
buildroot-2012.11 expected on December 1<br />
20 new packages per month<br />
Automatic tests: 100 builds per day
<strong>Buildroot</strong><br />
<strong>Buildroot</strong> has competition<br />
No package management<br />
Upgrades are system-wide<br />
Fixed-functionality <strong>systems</strong><br />
PtxDist<br />
LTIB<br />
OpenWRT<br />
OpenEmbedded<br />
Yocto<br />
Runtime package management<br />
Upgrades are per-package<br />
Functionality is dynamically added<br />
Gentoo<br />
emDebian<br />
Root filesystem<br />
generator<br />
Distribution<br />
generator<br />
Distribution
<strong>Buildroot</strong> has competition<br />
<strong>Buildroot</strong><br />
●<br />
●<br />
●<br />
●<br />
PtxDist<br />
Kconfig configuration<br />
Makefiles<br />
LTIB<br />
OpenWRT<br />
Generates completely custom rootfs<br />
Very active community<br />
OpenEmbedded<br />
Yocto<br />
Gentoo<br />
emDebian<br />
Root filesystem<br />
generator<br />
Distribution<br />
generator<br />
Distribution
PtxDist is very similar to buildroot<br />
Created and maintained <strong>Buildroot</strong> by Pengutronix<br />
PtxDist<br />
●<br />
●<br />
●<br />
●<br />
LTIB<br />
Kconfig configuration<br />
shell scripts<br />
OpenWRT<br />
OpenEmbedded<br />
Generates completely custom rootfs<br />
Active community<br />
Yocto<br />
Gentoo<br />
Root filesystem<br />
generator<br />
Distribution<br />
generator<br />
emDebian<br />
Distribution
LTIB is history<br />
Freescale's Linux <strong>Buildroot</strong> distribution<br />
PtxDist<br />
●<br />
●<br />
●<br />
One large Perl script<br />
Small community<br />
LTIB<br />
OpenWRT<br />
OpenEmbedded<br />
Surpassed by the others<br />
Yocto<br />
Gentoo<br />
emDebian<br />
Root filesystem<br />
generator<br />
Distribution<br />
generator<br />
Distribution
OpenWRT is a buildroot distro<br />
●<br />
●<br />
●<br />
Fork <strong>of</strong> ancient buildroot<br />
<strong>Buildroot</strong><br />
Focus on WLAN routers<br />
PtxDist<br />
Package management & ICU configuration data<br />
LTIB<br />
OpenWRT<br />
OpenEmbedded<br />
Yocto<br />
Gentoo<br />
emDebian<br />
Root filesystem<br />
generator<br />
Distribution<br />
generator<br />
Distribution
OpenEmbedded is huge<br />
●<br />
●<br />
●<br />
●<br />
●<br />
●<br />
Bitbake build system<br />
<strong>Buildroot</strong><br />
ipkg package manager<br />
PtxDist<br />
Layered system<br />
LTIB<br />
– build distribution from several sources<br />
OpenWRT<br />
– flexible tracking <strong>of</strong> upstreams<br />
Difficult to change configuration<br />
Hard to understand<br />
Yocto<br />
Gentoo<br />
Slooooooooooooooooooooooooooooooooooooow<br />
emDebian<br />
Root filesystem<br />
generator<br />
OpenEmbedded<br />
Distribution<br />
generator<br />
Distribution
Yocto<br />
●<br />
●<br />
●<br />
OpenEmbedded derivative<br />
<strong>Buildroot</strong><br />
Layer(s) for TI processors<br />
PtxDist<br />
Eclipse integration<br />
LTIB<br />
● Marketing machine OpenWRT<br />
OpenEmbedded<br />
Yocto<br />
Gentoo<br />
emDebian<br />
Root filesystem<br />
generator<br />
Distribution<br />
generator<br />
Distribution
Desktop distributions<br />
●<br />
●<br />
●<br />
●<br />
Package manager<br />
can also be used for <strong>embedded</strong><br />
<strong>Buildroot</strong><br />
Binaries or source<br />
PtxDist<br />
LTIB<br />
Cross-build turns out OpenWRT to be problematic<br />
OpenEmbedded<br />
Difficult to make it reproducible<br />
Yocto<br />
Gentoo<br />
emDebian<br />
Root filesystem<br />
generator<br />
Distribution<br />
generator<br />
Distribution
Bringing up your device is easy<br />
with <strong>Buildroot</strong>
www.mind.be<br />
www.essensium.com<br />
Essensium NV<br />
<strong>Mind</strong> - Embedded S<strong>of</strong>tware Division<br />
Gaston Geenslaan 9, B-3001 Leuven<br />
Tel : +32 16-28 65 00<br />
Fax : +32 16-28 65 01<br />
email : info@essensium.com
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