armv7m--uclibc--bleeding-edge-2017.05-toolchains-1-2 Toolchains are hosted here: http://toolchains.bootlin.com/ All the licenses can be found here: http://toolchains.bootlin.com/downloads/releases/licenses/ All the sources can be found here: http://toolchains.bootlin.com/downloads/releases/sources/ PACKAGE VERSION LICENSE buildroot 2017.05 GPL-2.0+ gcc-final 6.3.0 unknown binutils 2.28 GPL-3.0+, libiberty LGPL-2.1+ elf2flt 9dbc458c6122c495bbdec8dc975a15c9d39e5ff2 GPL-2.0+ zlib 1.2.11 Zlib gmp 6.1.2 LGPL-3.0+ or GPL-2.0+ m4 1.4.18 GPL-3.0+ mpc 1.0.3 LGPL-3.0+ mpfr 3.1.5 LGPL-3.0+ gcc-initial 6.3.0 unknown uclibc 1.0.24 LGPL-2.1+ linux-headers 4.9.30 GPL-2.0 For those who would like to reproduce the toolchain, you can just follow these steps: git clone https://github.com/free-electrons/buildroot-toolchains.git buildroot cd buildroot git checkout 2017.05-toolchains-1 curl http://toolchains.bootlin.com/downloads/releases/build_fragments/armv7m--uclibc--bleeding-edge-2017.05-toolchains-1-2.defconfig > .config make olddefconfig make This toolchain has been built, but the test system failed to build with it. This doesn't mean that this toolchain doesn't work, just that it hasn't been successfully tested. FLAG: SYSTEM-BUILD-FAILED