Version v8.2.1-1.3 20190202 is a maintenance release of GNU MCU Eclipse ARM Embedded GCC that fixes the GDB and liblto_plugin bugs 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
  • the -static option was removed from the Windows build, to allow for the liblto_plugin-0.dll to be created; the libwinpthread-1.dll was copied to the bin folder
  • the liblto_plugin copied/linked to the lib/bdf-plugins for ar to find it and be able to process archives with LTO objects.


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 & debugging on Windows

The Arm 8-2018-q4-major release introduced a problem on Windows, enabling debugging information (-g/-g3) prevents -flto to properly link. For Release configurations it is not a problem to remove the debug options, but for Debug configurations this is unusable. The workaround is to revert to the previous 7-2018-q2-update release, or to temporarily disable -flto. (89183)

LTO & paths with spaces on Windows

When installing on Windows in locations with spaces in folder names, the link step fails for builds using LTO. (89249)


The SHA-256 hashes for the files are:

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