The seL4 microkernel
C TeX C++ Assembly Makefile HyPhy Other
Latest commit b25b826 Oct 21, 2016 @AdrianDanis AdrianDanis Makefile: Fix typo

The seL4 Repository

This repository contains the source code of seL4 microkernel.

For details about the seL4 microkernel, including details about its formal correctness proof, please see the website and associated FAQ.

DOIs for citing recent releases of this repository:

  • DOI

We welcome contributions to seL4. Please see the website for information on how to contribute.

This repository is usually not used in isolation, but as part of the build system in a larger project.

Repository Overview

  • include and src: C and ASM source code of seL4
  • tools: build tools
  • libsel4: C bindings for the seL4 ABI
  • manual: LaTeX sources of the seL4 reference manual

Build Instructions


TOOLPREFIX=arm-none-eabi- ARCH=arm PLAT=imx6 ARMV=armv7-a CPU=cortex-a9 \

The kernel source requires a cross-compiler for the target architecture. To build using make, follow these instructions:

  • Ensure that the appropriate cross-compiler for your target architecture is installed.

  • Set the TOOLPREFIX environment variable to your cross-compiler's prefix. E.g. arm-none-eabi-.

  • Set the ARCH, PLAT, ARMV and CPU variables for the intended target architecture and platform, chosen from the following lists:

    arm imx31 armv6 arm1136jf-s
    arm omap3 armv7-a cortex-a8
    arm am335x armv7-a cortex-a8
    arm imx6 armv7-a cortex-a9
    ia32 pc99
  • For a debug build, append DEBUG=y and to see serial output additionally append CONFIG_KERNEL_EXTRA_CPPFLAGS="-DCONFIG_PRINTING=y -DCONFIG_USER_STACK_TRACE_LENGTH=16".

See the seL4 website for more comprehensive build instructions.


The files in this repository are released under standard open source licenses. Please see the individual file headers and LICENSE_GPLv2.txt and LICENSE_BSD2.txt files for details.