Re: RFA: AVR: add infrastructure for device packages

[Denis Chertykov <chertykov at gmail dot com>]

2014-10-08 21:50 GMT+04:00 Joern Rennecke <joern.rennecke@embecosm.com>:
> As the steering commitee still hasn't spoken on the maintainership issue,
> apparently this still has to go the write-after-approval route.
>
> The purpose of this patch is to make it possible to add support for new
> devices (MCUs) to the AVR toolchain, without having to re-build the
> entire toolchain.  This capability is desirable because new MCUs are added
> fairly frequently.
>
> There are multiple parts of the toolchain involved.
> gcc changes multilibbing to key off the new -march option; the -mmcu option
> is translated via DRIVER_SELF_SPECS into a -specs option, and the
> individual spec files contain the required settings like -march, and various
> more detailed settings (some of which are for new options).
>
> binutils provides new relocation and relaxation facilities to allow referring
> symbolically to symbol differences and/or I/O addresses.
> avr-libc puts the device-specifc header settings in avr/io*.h, and a few
> small device-specific likbale functions into a device-specific library.
>
> The other toolchain parts are staged here:
> git@github.com:embecosm/avr-binutils-gdb.git avr-mainline
> git@github.com:embecosm/avr-libc.git avr-libc-embecosm-mainline
>
>
> Attached is the GCC patch for the basic device package infrastructure.
> OK to apply?


Please, apply.

Denis.