This layer contains recipes for GNU Arm toolchains which could either be built from source or pre-built toolchain binaries.
Information regarding contributing, reporting bugs, etc can be found in the top-level meta-arm readme file.
Recipes for GNU Arm toolchain built from source are provided under recipes-devtools/gcc/. In order to use Arm toolchain instead of OE core toolchain, one just needs to override GCCVERSION in corresponding distro conf file.
9.2 GCCVERSION = "arm-9.2"Recipes for pre-built GNU Arm toolchain for Linux development are provided under recipes-devtools/external-arm-toolchain/.
external-arm-toolchain.bb
This recipe provides support for pre-built GNU toolchains targeting processors from the Arm Cortex-A family and implementing the Arm A-profile architecture. Usage ^^^^^ In order to use any of pre-built Arm toolchain versions (8.2, 8.3, 9.2 and so on), a user needs to download and untar tool-set on host machine at a particular installation path eg: ``/opt/toolchain/``. Then user needs to specify following in ``conf/local.conf`` in order to replace OE toolchain with pre-built GNU-A toolchain: TCMODE = "external-arm" EXTERNAL_TOOLCHAIN = "<path-to-the-toolchain>" - Eg. for AArch64 (eg. qemuarm64 machine in poky distro) EXTERNAL_TOOLCHAIN = "\ <installation-path>/gcc-arm-9.2-2019.12-x86_64-aarch64-none-linux-gnu \ " - Eg. for AArch32 (eg. qemuarm machine in poky distro) EXTERNAL_TOOLCHAIN = "\ <installation-path>/gcc-arm-9.2-2019.12-x86_64-arm-none-linux-gnueabihf \ " Supported distros and machines ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Since this pre-built GNU-A tool-set simply replaces OE toolchain, so it is meant to be distro and machine agnostic as long as one is cross-compiling for Arm A-profile architecture. Tested distro and machines (for zeus stable release): 1. Distro: poky; machines: qemuarm and qemuarm64 (build and boot tested) 2. Distro: RPB; machines: dragonboard-410c (build and boot tested) 3. Distro: world; machines: qemuarm and qemuarm64. Build tested for following layers: - poky/meta - poky/meta-poky - poky/meta-yocto-bsp - meta-openembedded/meta-oe - meta-openembedded/meta-python - meta-openembedded/meta-networking SDK support ^^^^^^^^^^^ Pre-built toochain provides support to build OE SDK which has been tested using following commands: $ bitbake core-image-base -c populate_sdk $ bitbake core-image-base -c testsdk Note: Currently generated SDK only uses glibc provided by pre-built toolchain. The cross compiler, binutils, gdb/gdbserver etc. are built from source. This is something we would like to improve in future in order to package most of the components from pre-built toolchain instead. Pre-built Arm toolchain for bare-metal development -------------------------------------------------- Recipes for pre-built GNU Arm toolchain for bare-metal development are provided under ``recipes-devtools/external-arm-toolchain/``. gcc-arm-none-eabi_<version>.bb
This recipe provides support for pre-built GNU Arm Embedded toolchain for bare-metal software development on devices based on 32-bit Arm Cortex-A, Cortex-R and Cortex-M processors.
Supported version: 9-2019-q4-major
gcc-aarch64-none-elf_.bb
This recipe provides support for pre-built GNU Arm toolchain for bare-metal software development on devices based on 64-bit Arm Cortex-A processors. Supported version: 9.2-2019.12 Layer maintainer(s) ------------------- * Sumit Garg <sumit.garg@linaro.org> * Denys Dmytriyenko <denis@denix.org>