Version v8.2.1-1.4 20190214 is a maintenance release of GNU MCU Eclipse ARM Embedded GCC that fixes the bugs affecting Windows LTO builds, present in the previous release.

Binary files »


Use v8.2.1-1.6.


This release follows the official GNU Arm Embedded Toolchain 8-2018-q4-major release from December 20, 2018 and it is based on the gcc-arm-none-eabi-8-2018-q4-major-src.tar.bz2 source invariant.


Compared to the ARM distribution, the build procedure is more or less the same and there should be no functional differences, except the following bug fixes:

  • a patch was applied to binutils to fix the 32-bit objcopy bug 24065
  • GDB was built the Git commit ad0f979c9 from 2019-01-29, to fix the bugs affecting C++ LTO projects 24145
  • [Issue:#3] by default, the GCC build script fails to create liblto_plugin-0.dll for static builds with mingw; code to create the plugin was added
  • [Issue:#1] the liblto_plugin copied/linked to the lib/bdf-plugins for ar to find it and be able to process archives with LTO objects
  • a patch was applied to gcc to fix the Windows LTO with -g bug 89183
  • a patch was applied to gcc to fix the Windows paths with spaces bug 89249


Binaries for Windows, macOS and GNU/Linux are provided.

The GNU/Linux binaries were built on two CentOS 6 Docker images (32/64-bit), and run on any distribution based on CentOS 6 or later.

The macOS binary was built on a macOS 10.10.5 and must run on any newer macOS system.

The Windows binaries were built with mingw-w64, and run on any reasonably recent i686 and x86_64 Windows machines.

Instructions on how to install the binaries are available in the How to install the ARM toolchain? page.

The toolchain is also available as an xPack and can be conveniently installed with xpm:

xpm install --global @gnu-mcu-eclipse/arm-none-eabi-gcc

This installs the latest available version.

For better control and repeatability, the build scripts use Docker containers; all files required during builds are available as a separate gnu-mcu-eclipse/arm-none-eabi-gcc-build project.

Known problems

  • LTO is still not functional on Windows.


The SHA-256 hashes for the files are:

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845274a50fa7b0c6e4af7641ece4aba33c1fec447cb32537f68fda389998a6af ?

f9f517082540f13e0803ac8eaf64a7f3a8c54bfc5b5ad4e6589c31e2289d617e ?

fbdbdf46ca35201bc3330eda659b3aeb8f77003ebc26e930c1f2535429e0e3be ?