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

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 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. Mesa Git Yields Performance Improvements For Newer AMD GPUs
  2. Apple OS X 10.10 vs. Ubuntu 14.10 Performance
  3. Mesa 10.5-devel Brings Some Intel Haswell HD Graphics Changes Over Mesa 10.3
  4. NVIDIA vs. Nouveau Drivers With Linux 3.18 + Mesa 10.4-devel
Latest Linux News
  1. ReactOS Lands Its New Explorer Shell
  2. Weston's IVI Shell Sees New Version
  3. IMP Launches As Another Open-Source Computer Attempt
  4. Git 2.2.0 Released With 550+ Changes
  5. GNOME 3.15.2 Released
  6. Quantum OS Aims For A Linux Desktop With QML, Wayland & Material Design
  7. New Open-Source, Linux Benchmarks To Feast On
  8. FreeBSD Plans For The Next Ten Years
  9. Qt 5.4 Planned For Release On 9 December
  10. Meizu's Ubuntu Phone Not Expected Until Early Next Year
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