We have a new release candidate! Lots of changes all over the tree, see the CHANGES file for details, and read the announcement.
Head to the downloads page to pick up the 2015.05-rc1 release candidate, and report any problems found to the mailing list or bug tracker.
The stable 2015.02 release is out - Thanks to everyone contributing and testing the release candidates. See the CHANGES file for more details, read the announcement and go to the downloads page to pick up the 2015.02 release.
Release candidate 3 is out with more cleanups and security / build fixes. See the CHANGES file for details.
Head to the downloads page to pick up the 2015.02-rc3 release candidate, and report any problems found to the mailing list or bug tracker.
Another week, another release candidate with more cleanups and build fixes. See the CHANGES file for details.
Head to the downloads page to pick up the 2015.02-rc2 release candidate, and report any problems found to the mailing list or bug tracker.
We have a new release candidate! Lots of changes all over the tree, see the CHANGES file for details, and read the announcement.
Head to the downloads page to pick up the 2015.02-rc1 release candidate, and report any problems found to the mailing list or bug tracker.
The stable 2014.11 release is out - Thanks to everyone contributing and testing the release candidates. See the CHANGES file for more details, and go to the downloads page to pick up the 2014.11 release.
Release candidate 3 is out with more cleanups and build fixes. See the CHANGES file for details.
Head to the downloads page to pick up the 2014.11-rc3 release candidate, and report any problems found to the mailing list or bug tracker.
Another week, another release candidate with more cleanups and build fixes. See the CHANGES file for details.
Head to the downloads page to pick up the 2014.11-rc2 release candidate, and report any problems found to the mailing list or bug tracker.
A report from the recent Buildroot Developers Meeting is now available.
Once again, thanks to all the participants and to Mind for sponsoring the event.
The next Developer Days will take place on February 2nd and 3rd in Brussels, Belgium, right after FOSDEM. See the wiki for more details.
We have a new release candidate! Lots of changes all over the tree, see the CHANGES file for details, and read the announcement.
Head to the downloads page to pick up the 2014.11-rc1 release candidate, and report any problems found to the mailing list or bug tracker.
The stable 2014.08 release is out - Thanks to everyone contributing and testing the release candidates. See the CHANGES file for more details, read the announcement and go to the downloads page to pick up the 2014.08 release.
Release candidate 3 is out with more cleanups and build fixes. See the CHANGES file for details.
Head to the downloads page to pick up the 2014.08-rc3 release candidate, and report any problems found to the mailing list or bug tracker.
Another week, another release candidate with more cleanups and build fixes. See the CHANGES file for details.
Head to the downloads page to pick up the 2014.08-rc2 release candidate, and report any problems found to the mailing list or bug tracker.
We have a new release candidate! Lots of changes all over the tree, see the CHANGES file for details, and read the announcement.
Head to the downloads page to pick up the 2014.08-rc1 release candidate, and report any problems found to the mailing list or bug tracker.
The stable 2014.05 release is out - Thanks to everyone contributing and testing the release candidates. See the CHANGES file for more details, read the announcement and go to the downloads page to pick up the 2014.05 release.
Release candidate 3 is out with more cleanups and build fixes. See the CHANGES file for details.
Head to the downloads page to pick up the 2014.05-rc3 release candidate, and report any problems found to the mailing list or bug tracker.
Another week, another release candidate with more cleanups and build fixes. See the CHANGES file for details.
Head to the downloads page to pick up the 2014.05-rc2 release candidate, and report any problems found to the mailing list or bug tracker.
We have a new release candidate! Lots of changes all over the tree, see the CHANGES file for details, and read the announcement.
Head to the downloads page to pick up the 2014.05-rc1 release candidate, and report any problems found to the mailing list or bug tracker.
The stable 2014.02 release is out - Thanks to everyone contributing and testing the release candidates. See the CHANGES file for more details, and go to the downloads page to pick up the 2014.02 release.
Release candidate 3 is out with more cleanups and build fixes. See the CHANGES file for details.
Head to the downloads page to pick up the 2014.02-rc3 release candidate, and report any problems found to the mailing list or bug tracker.
Another week, another release candidate with more cleanups and build fixes. See the CHANGES file for details.
Head to the downloads page to pick up the 2014.02-rc2 release candidate, and report any problems found to the mailing list or bug tracker.
We have a new release candidate! Lots of changes all over the tree, see the CHANGES file for details, and read the announcement.
Head to the downloads page to pick up the 2014.02-rc1 release candidate, and report any problems found to the mailing list or bug tracker.
A report from the recent Buildroot Developers Meeting is now available.
Once again, thanks to all the participants and to Google and Mind for sponsoring the event.
The upcoming Buildroot Developers meeting will take place in Brussels on February, 3rd and 4th, after the FOSDEM conference. Additional details about the meeting can be found on the corresponding wiki page.
Persons not able to join the meeting in Brussels can participate
remotely using Google Hangouts. Simply give your Google address to
thomas.petazzoni@free-electrons.com.
This meeting is sponsored by Google (for the meeting room) and Mind (for the dinner). Thanks to our sponsors!
The stable 2013.11 release is out - Thanks to everyone contributing and testing the release candidates. See the CHANGES file for more details, read the announcement and go to the downloads page to pick up the 2013.11 release.
The slides from the Buildroot presentation at the recent Embedded Linux Conference Europe 2013 are now available.
Another week, another release candidate with more fixes. See the CHANGES file for details.
Head to the downloads page to pick up the 2013.11-rc3 release candidate, and report any problems found to the mailing list or bug tracker.
Another week, another release candidate with more cleanups and build fixes. See the CHANGES file for details.
Head to the downloads page to pick up the 2013.11-rc2 release candidate, and report any problems found to the mailing list or bug tracker.
The next Buildroot Developer Days meeting will take place on Monday 3rd and Tuesday 4th February 2014 in Brussels, Belgium - Just after FOSDEM (February 1st/2nd). This two days meeting is mainly open to Buildroot developers and contributors, or Buildroot users having a prior experience with the tool. It will allow developers to work on Buildroot and discuss current issues, the future directions, and more.
In addition to the Buildroot event, we encourage embedded Linux developers to propose talks for the Embedded and Mobile Developer Room at FOSDEM. See the CFP.
We would like to thank our sponsor Google for sponsoring the event by providing all the needed logistics.
For more details, see the wiki page dedicated to the meeting.
We have a new release candidate! Lots of changes all over the tree, see the CHANGES file for details, and read the announcement.
Head to the downloads page to pick up the 2013.11-rc1 release candidate, and report any problems found to the mailing list or bug tracker.
A report from the recent Buildroot Developers Meeting is now available.
Once again, thanks to all the participants and to Imagination Technologies for sponsoring the event.
The 2013.08.1 bugfix release is out - Thanks to everyone contributing. This release fixes critical issues discovered since the 2013.08 release. See the CHANGES file for more details, and go to the downloads page to pick up the 2013.08.1 release.
The next Buildroot Developer Days meeting will take place on Saturday October 26th and Sunday October 27th 2013 in Edinburgh, UK - Just after the Embedded Linux Conference Europe (October 23th-24th). This two days meeting is mainly open to Buildroot developers and contributors, or Buildroot users having a prior experience with the tool. It will allow developers to work on Buildroot and discuss current issues, the future directions, and more.
For more details, see the wiki page dedicated to the meeting.
The stable 2013.08 release is out - Thanks to everyone contributing and testing the release candidates. See the CHANGES file for more details, read the announcement and go to the downloads page to pick up the 2013.08 release.
Another week, another release candidate with more cleanups and build fixes. See the CHANGES file for details.
Head to the downloads page to pick up the 2013.08-rc3 release candidate, and report any problems found to the mailing list or bug tracker.
We have a new release candidate! Lots of changes all over the tree, see the CHANGES file for details.
Head to the downloads page to pick up the 2013.08-rc2 release candidate, and report any problems found to the mailing list or bug tracker.
We have a new release candidate! Lots of changes all over the tree, see the CHANGES file for details.
Head to the downloads page to pick up the 2013.08-rc1 release candidate, and report any problems found to the mailing list or bug tracker.
The stable 2013.05 release is out - Thanks to everyone contributing and testing the release candidates. See the CHANGES file for more details, read the announcement and go to the downloads page to pick up the 2013.05 release.
Another week, another release candidate with more cleanups and build fixes. See the CHANGES file for details.
Head to the downloads page to pick up the 2013.05-rc3 release candidate, and report any problems found to the mailing list or bug tracker.
Another week, another release candidate with more cleanups and build fixes. See the CHANGES file for details.
Head to the downloads page to pick up the 2013.05-rc2 release candidate, and report any problems found to the mailing list or bug tracker.
We have a new release candidate! Lots of changes all over the tree, see the CHANGES file for details, and read the announcement.
Head to the downloads page to pick up the 2013.05-rc1 release candidate, and report any problems found to the mailing list or bug tracker.
The stable 2013.02 release is out - Thanks to everyone contributing and testing the release candidates. See the CHANGES file for more details and go to the downloads page to pick up the 2013.02 release.
Another week, another release candidate with more cleanups and build fixes. See the CHANGES file for details.
Head to the downloads page to pick up the 2013.02-rc3 release candidate, and report any problems found to the mailing list or bug tracker.
Another week, another release candidate with more cleanups and build fixes. See the CHANGES file for details.
Head to the downloads page to pick up the 2013.02-rc2 release candidate, and report any problems found to the mailing list or bug tracker.
We have a new release candidate! Lots of changes all over the tree, see the CHANGES file for details, and read the announcement.
Head to the downloads page to pick up the 2013.02-rc1 release candidate, and report any problems found to the mailing list or bug tracker.
A report from the recent Buildroot Developers Meeting is now available. Embedded Linux News also has a writeup about the event, including photos.
Once again, thanks to all the participants and to Google for sponsoring the event.
The next Buildroot Developers Meeting will take place on Monday 4th February 2013 and Tuesday 5th February 2013 in Brussels, Belgium. Those dates have been chosen to immediately follow the great FOSDEM conference.
Attending this meeting is free, after registration by contacting Thomas Petazzoni. For more details about the meeting, please see the related Wiki page.
We would like to thank Google for providing the meeting location and the Internet connection, and offering free lunch and refreshments to the participants.
The 2012.11.1 bugfix release is out - Thanks to everyone contributing. This release fixes critical issues discovered since the 2012.11 release, most importantly with non-largefile builds on recent Ubuntu versions. See the CHANGES file for more details, and go to the downloads page to pick up the 2012.11.1 release.
The stable 2012.11 release is out - Thanks to everyone contributing and testing the release candidates. See the CHANGES file for more details and go to the downloads page to pick up the 2012.11 release.
RC2 is out with more bugfixes - See the CHANGES file for details.
Head to the downloads page to pick up the 2012.11-rc2 release candidate, and report any problems found to the mailing list or bug tracker.
We have a new release candidate! Lots of changes all over the tree, see the CHANGES file for details, and read the announcement.
Head to the downloads page to pick up the 2012.11-rc1 release candidate, and report any problems found to the mailing list or bug tracker.
A report from the recent Buildroot Developer Days meeting in Barcelona, Spain is now available. Many thanks to all the participants, and a special thanks to Arnout Vandecappelle from mind for taking notes and Thomas Petazzoni from Free Electrons for handling all the practical arrangements, and naturally our sponsors, Fluendo and Synopsis.
The next Developer Days will take place on February 4th and 5th in Brussels, Belgium, right after FOSDEM.
The stable 2012.08 release is out - Thanks to everyone contributing and testing the release candidates. See the CHANGES file for more details and go to the downloads page to pick up the 2012.08 release.
We have a new release candidate! Various fixes, and addition of licensing informations on many packages. See CHANGES file for details
Head to the downloads page to pick up the 2012.08-rc3 release candidate, and report any problems found to the mailing list or bug tracker.
We have a new release candidate! Various fixes, and addition of licensing informations on many packages. See CHANGES file for details
Head to the downloads page to pick up the 2012.08-rc2 release candidate, and report any problems found to the mailing list or bug tracker.
We have a new release candidate! Lots of changes all over the tree, see the CHANGES file for details
Head to the downloads page to pick up the 2012.08-rc1 release candidate, and report any problems found to the mailing list or bug tracker.
The next Buildroot Developer Day meeting will take place on Saturday November 3th and Sunday November 4th 2012 in Barcelona, Spain, just before the Embedded Linux Conference Europe (November 5th-7th). This two days meeting is mainly opened to Buildroot developers and contributors, or Buildroot users having a prior experience with the tool. This meeting will allow developers to work and Buildroot, and discuss current issues, the future directions, and more.
For more details, see the wiki page dedicated to the meeting.
The stable 2012.05 release is out - Thanks to everyone contributing and testing the release candidates. See the CHANGES file for more details, read the announcement and go to the downloads page to pick up the 2012.05 release.
RC3 is out with more bugfixes - See the CHANGES file for details.
Head to the downloads page to pick up the 2012.05-rc3 release candidate, and report any problems found to the mailing list or bug tracker.
Another week, another release candidate with more cleanups and build fixes. See the CHANGES file for details.
Head to the downloads page to pick up the 2012.05-rc2 release candidate, and report any problems found to the mailing list or bug tracker.
We have a new release candidate! Lots of changes all over the tree, see the CHANGES file for details, and read the announcement.
Head to the downloads page to pick up the 2012.05-rc1 release candidate, and report any problems found to the mailing list or bug tracker.
The status of the autobuilders, which do repeated
randpackageconfig builds for continuous integration
testing, is now online at autobuild.buildroot.org. The
code behind it can be found in git.
Thanks to Thomas Petazzoni for running the web interface, and to The GCC Compile Farm and Free Electrons for hosting builders. Thomas also sends out a daily summary of the build status to the mailing list.
The stable 2012.02 release is out - Thanks to everyone contributing and testing the release candidates. See the CHANGES file for more details, read the announcement and go to the downloads page to pick up the 2012.02 release.
RC3 is out with more bugfixes - See the CHANGES file for details.
Head to the downloads page to pick up the 2012.02-rc3 release candidate, and report any problems found to the mailing list or bug tracker.
Another week, another release candidate with more cleanups and build fixes. See the CHANGES file for details.
Head to the downloads page to pick up the 2012.02-rc2 release candidate, and report any problems found to the mailing list or bug tracker.
We have a new release candidate! Lots of changes all over the tree, see the CHANGES file for details, and read the announcement.
Head to the downloads page to pick up the 2012.02-rc1 release candidate, and report any problems found to the mailing list or bug tracker.
Another Buildroot Developer Day will take place on Friday, February 3rd in Brussels, Belgium - The day before FOSDEM. See the announcement or the Free Electrons blog for more info.
The stable 2011.11 release is out - Thanks to everyone contributing and testing the release candidates. See the CHANGES file for more details, read the announcement and go to the downloads page to pick up the 2011.11 release.
RC3 is out with more bugfixes - See the CHANGES file for details.
Head to the downloads page to pick up the 2011.11-rc3 release candidate, and report any problems found to the mailing list or bug tracker.
Another week, another release candidate with a bunch of cleanups and build fixes. See the CHANGES file for details.
Head to the downloads page to pick up the 2011.11-rc2 release candidate, and report any problems found to the mailing list or bug tracker.
We have a new release candidate! Lots of changes all over the tree, see the CHANGES file for details, and read the announcement
Head to the downloads page to pick up the 2011.11-rc1 release candidate, and report any problems found to the mailing list or bug tracker.
The stable 2011.08 release is out - Thanks to everyone contributing and testing the release candidates. See the CHANGES file for more details, and go to the downloads page to pick up the 2011.08 release.
RC2 is out with more bugfixes. See the CHANGES file for details, and read the announcement.
Head to the downloads page to pick up the 2011.08-rc2 release candidate, and report any problems found to the mailing list or bug tracker.
We have a new release candidate! Lots of changes all over the tree, see the CHANGES file for details, and read the announcement.
Head to the downloads page to pick up the 2011.08-rc1 release candidate, and report any problems found to the mailing list or bug tracker.
The stable 2011.05 release is out - Thanks to everyone contributing and testing the release candidates. See the CHANGES file for more details, and go to the downloads page to pick up the 2011.05 release.
RC2 is out with more bugfixes. See the CHANGES file for details.
Head to the downloads page to pick up the 2011.05-rc2 release candidate, and report any problems found to the mailing list or bug tracker.
We have a new release candidate! Lots of changes all over the tree, see the CHANGES file for details, and read the announcement.
Head to the downloads page to pick up the 2011.05-rc1 release candidate, and report any problems found to the mailing list or bug tracker.
The stable 2011.02 release is out - Thanks to everyone contributing and testing the release candidates. See the CHANGES file for more details, read the announcement and go to the downloads page to pick up the 2011.02 release.
RC2 is out with more cleanups and bugfixes, see the CHANGES file for details.
Head to the downloads page to pick up the 2011.02-rc2 release candidate, and report any problems found to the mailing list or bug tracker.
We have a new release candidate! Lots of changes all over the tree, see the CHANGES file for details, and read the announcement.
Head to the downloads page to pick up the 2011.02-rc1 release candidate, and report any problems found to the mailing list or bug tracker.
The stable 2010.11 release is out - Thanks to everyone contributing and testing the release candidates. See the CHANGES file for more details, read the announcement and go to the downloads page to pick up the 2010.11 release.
RC2 is out with more cleanups and bugfixes, see the CHANGES file for details.
Head to the downloads page to pick up the 2010.11-rc2 release candidate, and report any problems found to the mailing list or bug tracker.
We have a new release candidate! Lots of changes all over the tree, see the CHANGES file for details, and read the announcement.
Head to the downloads page to pick up the 2010.11-rc1 release candidate, and report any problems found to the mailing list or bug tracker.
A Buildroot Developer Day will take place on Friday, October 29th in Cambridge, UK - Just the day after the Embedded Linux Conference Europe. This Developer Day aims at allowing Buildroot developers to meet and exchange ideas on the project and its future. See the announcement for more info.
Thanks to Thomas Petazzoni for taking care of the practical arrangements.
The stable 2010.08 release is out - Thanks to everyone contributing and testing the release candidates. See the CHANGES file for more details, read the announcement and go to the downloads page to pick up the 2010.08 release.
RC2 is out with more cleanups and bugfixes, see the CHANGES file for details.
Head to the downloads page to pick up the 2010.08-rc2 release candidate, and report any problems found to the mailing list or bug tracker.
This is very much expected to be the final release candidate, so give it a good test and expect a final 2010.08 release before September unless critical issues are found.We have a new release candidate! Lots of changes all over the tree, see the CHANGES file for details.
Head to the downloads page to pick up the 2010.08-rc1 release candidate, and report any problems found to the mailing list or bug tracker.
The stable 2010.05 release is out - Thanks to everyone contributing and testing the release candidates. See the CHANGES file for more details, read the announcement and go to the downloads page to pick up the 2010.05 release.
RC3 is out with more cleanups and bugfixes, see the CHANGES file for details.
Head to the downloads page to pick up the 2010.05-rc3 release candidate, and report any problems found to the mailing list or bug tracker.
Another week, another release candidate with a bunch of cleanups and build fixes.
Head to the downloads page to pick up the 2010.05-rc2 release candidate, and report any problems found to the mailing list or bug tracker.
We have a new release candidate! Lots of changes all over the tree, see the CHANGES file for details.
Head to the downloads page to pick up the 2010.05-rc1 release candidate, and report any problems found to the mailing list or bug tracker.
The slides from the Cross Build Systems: Present & Future session at FOSDEM are now online.
The stable 2010.02 release is out - Thanks to everyone contributing and testing the release candidates. See the CHANGES file for more details, and go to the downloads page to pick up the 2010.02 release.
RC2 is out with more cleanups and bugfixes, see the CHANGES file for details.
Head to the downloads page to pick up the 2010.02-rc2 release candidate, and report any problems found to the mailing list or bug tracker.
We have a new release candidate! Lots of changes all over the tree, see the CHANGES file for details.
Head to the downloads page to pick up the 2010.02-rc1 release candidate, and report any problems found to the mailing list or bug tracker.
The stable 2009.11 release is out - Thanks to everyone contributing and testing the release candidates. See the announcement or CHANGES for more details, and go to the downloads page to pick up the 2009.11 release.
RC2 is out with more cleanups and bugfixes, see the CHANGES file for details.
Head to the downloads page to pick up the 2009.11-rc2 release candidate, and report any problems found to the mailing list or bug tracker.
We have a new release candidate! Lots of changes all over the tree, see the CHANGES file for details.
Head to the downloads page to pick up the 2009.11-rc1 release candidate, and report any problems found to the mailing list or bug tracker.
The first Buildroot Developer Day will take place on Saturday, October 17th in Grenoble, France, just the day after Embedded Linux Conference Europe. This Developer Day aims at allowing Buildroot developers to meet and exchange ideas on the project and its future.
As the number of places is limited, interested candidates are
invited to send an e-mail to Peter Korsgaard (jacmet at
uclibc dot org) and Thomas Petazzoni (thomas dot
petazzoni at free-electrons dot com).
This Developer Day will take place thanks to the sponsoring of Calao Systems and Free Electrons.
The stable 2009.08 release is out - Thanks to everyone contributing and testing the release candidates. See the announcement or CHANGES for more details, and go to the downloads page to pick up the 2009.08 release.
A number of bugfixes have been added to the tree since RC2 (especially thanks to Thomas Petazzoni) - See the CHANGES file for details. This is very much expected to be the final release candidate, so give it a good test and expect a final 2009.08 release next weekend unless critical issues are found.
Head to the downloads page to pick up the 2009.08-rc3 release candidate, and report any problems found to the mailing list or bug tracker.
RC2 is out with more cleanups and bugfixes, see the CHANGES file for details.
Head to the downloads page to pick up the 2009.08-rc2 release candidate, and report any problems found to the mailing list or bug tracker.
We have a new release candidate! Lots of changes all over the tree, see the CHANGES file for details.
Head to the downloads page to pick up the 2009.08-rc1 release candidate, and report any problems found to the mailing list or bug tracker.
The stable 2009.05 release is out - Thanks to everyone contributing and testing the release candidates. See the announcement or CHANGES for more details, and go to the downloads page to pick up the 2009.05 release.
We had a number of fixes post-RC2, so RC3 is out (see CHANGES for details). Now is the moment to test and verify that everything is working for your favorite config - Expect a final 2009.05 very soon.
Head to the downloads page to pick up the 2009.05-rc3 release candidate, and report any problems found to the mailing list or bug tracker.
RC2 is out with more cleanups and bug fixes (see CHANGES). Unless big issues are found, expect this to be the last release candidate before the release - So give it a good test.
Head to the downloads page to pick up the 2009.05-rc2 release candidate, and report any problems found to the mailing list or bug tracker.
Earl Levine has been so kind to donate the buildroot.org domain to us, so the website can now also be reached at www.buildroot.org (and git at git.buildroot.org). Thanks a lot Earl!
We have a new release candidate! Lots of changes all over the tree, see the CHANGES file for details.
Head to the downloads page to pick up the 2009.05-rc1 release candidate, and report any problems found to the mailing list or bug tracker.
We've moved the source code from Subversion to Git. You can browse the repo online here, and clone the repo using:
git clone git://git.buildroot.net/buildrootSee the Git Access page for more details.
We have a logo! We have so far been using the Busybox logo on the website, as the website was a copy of the Busybox one - But not anymore, we now have a shiny new logo of our own.
The stable 2009.02 release is out - Thanks to everyone contributing and testing the release candidates. See the announcement for more details, and go to the downloads page to pick up the 2009.02 release.
We had more than 50 changes since RC3, several of them toolchain related, so decided to make a RC4 as well. This is very much expected to be the final release candidate, so give it a good test and expect a final 2009.02 release this week unless critical issues are found.
Head to the downloads page to pick up the 2009.02-rc4 release candidate, and report any problems found to the mailing list or bug tracker.
RC3 is out with more cleanups and bug fixes. Unless big issues are found, expect this to be the last release candidate before the release - So give it a good test.
Head to the downloads page to pick up the 2009.02-rc3 release candidate, and report any problems found to the mailing list or bug tracker.
Another week, another release candidate with a bunch of cleanups and build fixes.
Head to the downloads page to pick up the 2009.02-rc2 release candidate, and report any problems found to the mailing list or bug tracker.
It has been a long time coming, but we finally have a new release candidate! - And a new maintainer to match (Peter Korsgaard).
Head to the downloads page to pick up the 2009.02-rc1 release candidate, and report any problems found to the mailing list or bug tracker. The plan is to release 2009.02 in time for FOSDEM.
Buildroot now has its own mailing list.
Buildroot is a set of Makefiles and patches that makes it easy generate a cross-compilation toolchain and root filesystem for your target Linux system using the uClibc C library. Buildroot is useful mainly for people working with small or embedded systems. Embedded systems often use processors that are not the regular x86 processors everyone is used to using on their PC. It can be PowerPC processors, MIPS processors, ARM processors, etc. And to be extra safe, you do not need to be root to build or run buildroot.
And as of today buildroot even has its own webpage, making it a first class citizen of uclibc.org and busybox.net, and more importantly, make it easy to find and point to buildroot.
If you find a bug in buildroot, or wish to submit a patch to fix a problem or add a shiny new feature, please use the Bug and Patch Tracking System to post the details, to make certain your work is not lost.
