• How to setup sbuild
• Improve things with APT-cacher-NG
• Change sbuild configuration, add the following lines to ~/.sbuildrc:

# Do not update chroot everytime i.e. you need to take care of that yourself!
$apt_update = 0;
$apt_upgrade = 0;
$apt_distupgrade = 0;

NB: the following will only work with '3.0 (quilt)' package. Check "Format:" field in dsc file.

1. Make sure a bug report does not already exist
2. Get package source from sid: apt-get -t unstable source _package_
3. Update your sbuild chroot once (we disabled automatic updates in ~/.sbuildrc): sudo sbuild-update -udcar sid-amd64-sbuild If GCC stuff was installed/updated, clean it (see the wiki page above).
4. Test if build still fails: sbuild _package-version_.dsc
5. If build fails, cd to package directory: cd _package-version_/
6. Create a new patch using quilt: quilt new _patchname_
7. Add source file(s) to fix: quilt add _some-source-to-fix_
8. Fix source files using your favorite $EDITOR
9. "commit" them: quilt refresh
10. Generate a proper patch header: quilt header -e --dep3
11. Un-apply all patches: quilt pop -a
12. Move to parent folder: cd ..
13. Create a source package from folder: dpkg-source -b _package-version_/
14. Try a new build: sbuild _package-version_.dsc

If your patch fixes the issue the build should be successful. Fill a bug report with patch :-)

• reportbug: FTBFS with clang instead of gcc
• When editing the message, add

Usertags: clang-ftbfs
User: pkg-llvm-team@lists.alioth.debian.org

• Do not forget to attach the patch (a after editing or reportbug -A path/to/the/patch)
• Send it :-)