Sylvestre's blog

The LLVM toolchain version 3.3 has been released a couple months ago.
Here are now the result of the rebuild of Debian archive using this version of the compiler.
Like the previous releases, we are at a bit less than 12% of packages failing (2188 packages on a total of 18854).
More warnings / errors detections have been added to the software (for example: like this defect of the C++ standard or the detection of unused linker option) causing more build failures, but, in the mean time, we fixed some issues in the Debian packages...

As usual, the following image shows clearly the evolution of the build failures over time.

As stated in my blog post for the release 3.2, this rebuilds prove that Clang is ready for production in term of support of the C, C++ and Objective C languages.

With the performance results showed by Chandler Carruth from Google at the last Euro LLVM summit (see this video from 5:40), I believe that it is now time to report and fix the bugs in the upstream packages.

I also presented this work (video) at the Debconf 13 last week in Vaumarcus (Switzerland) and I will be also presenting this work at the Linux Plumbers Conference, New Orleans.

With Léo Cavaille (as part of his GSOC) and Paul Tagliamonte, we are also working on providing a better automatic rebuild infrastructure for clang-built packages (and other static analyzers). More in the next few weeks.

Finally, I would like to thank folks at AWS for the Debian credit and David Suarez for helping on with the Ruby segfaults.