Linux/PROCESSOR-SDK-AM335X: Setting up build environment for arago

Vraj Patel

Tool/software: Linux

Hello

I am setting up build environment for the bitbake build and need to set toolchain path. I am looking at two resources and both set it up differently. First resource is http://arago-project.org/wiki/index.php/Setting_Up_Build_Environment

$ bitbake TOOLCHAIN_PATH=$HOME/gcc-arm-8.3-2019.03-x86_64-arm-linux-gnueabihf ...

And second one is http://software-dl.ti.com/processor-sdk-linux/esd/docs/latest/linux/Overview_Building_the_SDK.html.

export TOOLCHAIN_PATH_ARMV7=$HOME/gcc-linaro-7.2.1-2017.11-x86_64_arm-linux-gnueabihf
export TOOLCHAIN_PATH_ARMV8=$HOME/gcc-linaro-7.2.1-2017.11-x86_64_aarch64-linux-gnu

What is the difference between this two ways?

over 4 years ago

0 Kemal R. Shakir over 4 years ago

TI__Guru 55345 points

Hello Vraj,

Please, see this patch to understand the difference.

If you do not have the TOOLCHAIN_PATH defined, TOOLCHAIN_PATH_ARMV7, TOOLCHAIN_PATH_ARMV8 or TOOLCHAIN_PATH_ARMV5 will be taken as TOOLCHAIN_PATH.

Best regards,
Kemal

0 Denys Dmytriyenko over 4 years ago in reply to Kemal R. Shakir

TI__Prodigy 355 points

If you do not have the TOOLCHAIN_PATH defined, TOOLCHAIN_PATH_ARMV7, TOOLCHAIN_PATH_ARMV8 or TOOLCHAIN_PATH_ARMV5 will be taken as TOOLCHAIN_PATH.

Correct. And in this particular case AM335x is an ARMv7 core, so only one toolchain needs to be defined. Setting TOOLCHAIN_PATH is preferred, but if not set, it will be taken from TOOLCHAIN_PATH_ARMV7 as a fall back.

There are other platforms with multiple cores of different ARM architectures (e.g. ARMv7+ARMv8), which require specifying multiple toolchains, hence the mechanism to do so on a per-architecture level. Luckily, AM335x is not such platform, so don't need to worry about this complexity.

0 Vraj Patel over 4 years ago in reply to Denys Dmytriyenko

Intellectual 255 points

Thanks Denys for the clarification.

0 Kemal R. Shakir over 4 years ago in reply to Vraj Patel

TI__Guru 55345 points

Hello Vraj,

If everything is clear now, please do not forget to mark the thread as resolved.

Thanks,
Kemal

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Linux/PROCESSOR-SDK-AM335X: Setting up build environment for arago