1. Computers
  2. Display Drivers
  3. Graphics Cards
  4. Memory
  5. Motherboards
  6. Processors
  7. Software
  8. Storage
  9. Operating Systems


Facebook RSS Twitter Twitter Google Plus


Phoronix Test Suite

OpenBenchmarking.org

Moving Towards Building The Linux Kernel With Clang

Compiler

Published on 04 November 2012 07:58 AM EST
Written by Michael Larabel in Compiler
37 Comments

While it hasn't been a news item for a couple months, a group of developers are still hard at work to advance the LLVM/Clang compiler and the Linux kernel to a point where this alternative compiler to GCC can be used for building the Linux kernel.

Going back two years ago when a concerted effort began to build the Linux kernel with LLVM's Clang compiler. At the time a number of patches were needed to both LLVM/Clang and the Linux kernel itself plus there were lots of broken parts. Patches are still needed, but more of the Linux kernel is properly working and it's an easier process than it once was.

Building the Linux kernel with the Apple-sponsored C/C++ compiler began as an independent project by individuals, but Qualcomm has also jumped on the task as they want to build ARM Linux kernels with Clang for their hardware. In August at LinuxCon was the most recent status update on the LLVM Linux project.

While there is no major announcement to share this weekend, for those interested in supporting this project or trying out an x86_64/ARM Clang'ed kernel build, the efforts continue to be centralized at llvm.linuxfoundation.org.

There is an easy-to-use project bug status report there that shows the state of LLVM issues for x86 and ARM, outstanding kernel issues, and Clang problems. Among the outstanding issues are items like superfluous warnings when compiling the kernel, the which command seg-faulting from Clang-built kernels on ARM, global register variables not being supported in LLVM/Clang, various compiler arguments that Clang is missing compared to GCC, a crash in the Clang static analyzer, broken kernel module unloading, etc.

While there are outstanding problems, it is possible to build a (non-production) working kernel. The Git repository for the modified Linux kernel that supports building under LLVM/Clang can be found on the Linux Foundation server. For those looking to get involved, there is an active mailing list.

About The Author
Michael Larabel is the principal author of Phoronix.com and founded the web-site in 2004 with a focus on enriching the Linux hardware experience and being the largest web-site devoted to Linux hardware reviews, particularly for products relevant to Linux gamers and enthusiasts but also commonly reviewing servers/workstations and embedded Linux devices. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics hardware drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated testing software. He can be followed via and or contacted via .
Latest Linux Hardware Reviews
  1. Intel Xeon E5-1680 v3 & E5-2687W v3 Compared To The Core i7 5960X On Linux
  2. Intel 120GB 530 Series SSD Linux Performance
  3. Btrfs/EXT4/XFS/F2FS RAID 0/1/5/6/10 Linux Benchmarks On Four SSDs
  4. AMD's Windows Catalyst Driver Remains Largely Faster Than Linux Drivers
Latest Linux Articles
  1. Apple OS X 10.10 vs. Ubuntu 14.10 Performance
  2. Mesa 10.5-devel Brings Some Intel Haswell HD Graphics Changes Over Mesa 10.3
  3. NVIDIA vs. Nouveau Drivers With Linux 3.18 + Mesa 10.4-devel
  4. Is The Open-Source NVIDIA Driver Fast Enough For Steam On Linux Gaming?
Latest Linux News
  1. Meizu's Ubuntu Phone Not Expected Until Early Next Year
  2. DragonFlyBSD 4.0 Drops i386 Support, Improves Graphics
  3. Expensive "Free/Libre Software Laptop" Uses A NVIDIA GPU
  4. QEMU 2.2-rc3 Released, Final Release Pushed Back By Couple Days
  5. 64-bit ARM FreeBSD Support Is Taking Shape
  6. GCW Zero Starts Seeing New Game Releases
  7. Intel's Cherry Trail Delayed To Next Year
  8. Bq Introduces More Android Devices, But Still No Ubuntu Phones
  9. Qt 5.4 Release Candidate Expected Later This Week
  10. ArrayFire Accelerated Compute Library Open-Sourced
Latest Forum Discussions
  1. Updated and Optimized Ubuntu Free Graphics Drivers
  2. Hurrican SDL Port
  3. Roadmap to Catalyst 14.10 ?
  4. how to configure module phoromatic ?
  5. PulseAudio 6.0 Is Coming & Other Linux Audio Plans For The Future
  6. Debian Developer Resigns From The Systemd Maintainership Team
  7. Cant get working Kaveri APU - A10-7850k
  8. Script for Fan Speed Control