RFC: Add ELF note for description with JSON data

[Sebastian Huber]

Hello Nick,

On 29.03.23 16:27, Nick Clifton wrote:
> Hi Sebastian,
> 
>> I would like to add some metadata to executable ELF files for the 
>> RTEMS real-time operating system.
> 
> Have you considered using the --package-data linker option ?
> 
>    '--package-metadata=JSON'
>       Request the creation of a '.note.package' ELF note section.  The
>       contents of the note are in JSON format, as per the package
>       metadata specification.  For more information see:
> https://systemd.io/ELF_PACKAGE_METADATA/ If the JSON argument is
>       missing/empty then this will disable the creation of the metadata
>       note, if one had been enabled by an earlier occurrence of the
>       -package-metdata option.  If the linker has been built with
>       libjansson, then the JSON string will be validated.

thanks, this looks like the thing we need.

Independent of this, selecting the output format of readelf (and other 
tools) would be nice.

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