[PATCH] Add cross compile dependecy info for ARMv7

[Heinrich Schuchardt]

On 28.11.24 17:48, Peter Polgar wrote:
> This commit adds info about the needed package to cross compile
> U-Boot to ARMv7 (32 bit) architecture on Debian based distros.
> ---
>   doc/build/gcc.rst | 12 ++++++++++++
>   1 file changed, 12 insertions(+)
> 
> diff --git a/doc/build/gcc.rst b/doc/build/gcc.rst
> index d8fcfdc4bf..c552e7b590 100644
> --- a/doc/build/gcc.rst
> +++ b/doc/build/gcc.rst
> @@ -19,6 +19,12 @@ You could install GCC and the GCC cross compiler
> for the ARMv8 architecture with
> 
>       sudo apt-get install gcc gcc-aarch64-linux-gnu
> 
> +For the ARMv7 architecture (32 bit)  use the below command instead
> +
> +.. code-block:: bash
> +
> +    sudo apt-get install gcc crossbuild-essential-armhf

crossbuild-essential-armhf depends on
gcc-arm-linux-gnueabihf gcc:armhf, g++-arm-linux-gnueabihf, g++:armhf, 
dpkg-cross

But gcc-arm-linux-gnueabi is all you need for cross-compiling 32-bit ARM 
U-Boot.

Adding an example for every architecture seems too much to me.

Can't we simply update this sentence pointing out the the arm 
cross-compiler has a suffix.

"On Debian based systems the cross compiler packages are named
gcc-<architecture>-linux-gnu".

E.g. add

"gcc-arm-linux-gnueabi is the 32-bit ARM cross-compiler package."

> +
>   Depending on the build targets further packages maybe needed
> 
>   .. code-block:: bash
> @@ -118,6 +124,12 @@ Assuming cross compiling on Debian for ARMv8 this would be
> 
>       CROSS_COMPILE=aarch64-linux-gnu- make
> 
> +Also on Debian but for ARMv7 it would be
> +
> +.. code-block:: bash
> +
> +    CROSS_COMPILE=arm-linux-gnueabihf- make

U-Boot supports  ARM SoCs prior to ARMv7. U-Boot doesn't use floating 
point. So arm-linux-gnueabi is the right choice for all 32-bit ARM boards.

Best regards

Heinrich

> +
>   Out-of-tree building
>   ~~~~~~~~~~~~~~~~~~~~
>