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 Benchmarking Platform
Phoromatic Test Orchestration

Developers Still Pursue Linux Kernel With LLVM/Clang

Linux Kernel

Published on 29 January 2013 01:23 PM EST
Written by Michael Larabel in Linux Kernel
8 Comments

Open-source developers are still pursuing the feat of building the mainline Linux kernel with the LLVM/Clang compiler rather than GCC.

There's been much interest in building the Linux kernel with Clang rather than the GNU Compiler Collection, for a variety of reasons as covered in many past Phoronix articles. In 2010 the milestone was reached of building the kernel with LLVM's C/C++ compiler, but not the entire kernel was built at that time, there were many out-of-tree Linux kernel patches, out-of-tree LLVM/Clang patches, and not everything was working right.

While there's many parties going after the milestone of building the Linux kernel with a non-GCC compiler, there's still some work left. The last update covered on Phoronix with Clang'ing the Linux kernel was back in November.

Efforts surrounding this for x86 and ARM kernels continue to be via the Linux Foundation's LLVM Linux area. The latest work in this area will be covered in a talk this weekend at FOSDEM.

The Linux kernel can still be built with LLVM/Clang for x86 and ARMv7, but all the patches haven't been mainlined and there's still other work outstanding. There's LLVM patches to be upstreamed that are considered a "high priority" along with patches for the Clang compiler front-end, difference in behavior to be worked out between Clang and GCC for unsupported flags, improvements to the Clang Static Analyzer for the Linux kernel, proper 64-bit type handling support in ARM, making the Kbuild scripts in the kernel not GCC-dependent, upstreaming some kernel patches, and various other work.

A lot of this LLVM Linux work is being done by Qualcomm's Innovation Center where they have a strong interest in building the Linux kernel with Clang, as extensively covered here, so the ARM kernel support is generally in better shape than the x86 world for building with the Apple-sponsored compiler.

Expect more information once FOSDEM has concluded, but until then stop by llvm.linuxfoundation.org.

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 News
  1. Trying To Run The Intel Core i7 5775C On Linux
  2. VirtualBox 5.0 RC3 Brings VMM Fixes, Takes Care Of Some KDE DnD Problems
  3. Ubuntu Is Finally Fixing Its Annoying GRUB Setting
  4. Firefox 39.0 Brings New Features, HTML5 Changes
  5. OPNsense 15.7 Released As Fork Of Pfsense
  6. The Less-Powerful Intel Compute Stick With Ubuntu Will Soon Ship
  7. Kodi 15.0 Release Candidate 1 Arrives
  8. Fedora 23: Python 3 Default Approved; Netizen Spin Rejected
  9. GNOME Shell & Mutter Just Landed More Wayland Improvements
  10. Ubuntu MATE Announces A Partnership With A PC Hardware Vendor
Latest Articles & Reviews
  1. 6-Way File-System Comparison On The Linux 4.1 Kernel
  2. How KDE VDG Is Trying To Make Open-Source Software Beautiful
  3. Attempting To Try Out BCache On The Linux 4.1 Kernel
  4. CompuLab's Fitlet Is A Very Tiny, Fanless, Linux PC With AMD A10 Micro
Most Viewed News This Week
  1. Pinos Is For Linux Video What PulseAudio Is For Audio
  2. The State & Complications Of Porting The Unity Editor To Linux
  3. The Staging Pull For Linux 4.2: "Big, Really Big"
  4. Latest Rumor Pegs Microsoft Wanting To Buy AMD
  5. "PulseVideo" Coming To Complement PulseAudio?
  6. Exciting Features Merged So Far For The Linux 4.2 Kernel
  7. RadeonSI Gallium3D Gets New OpenGL 4 Bits
  8. Linux 4.2 Advertises GFS2 Performance Improvements