Recent removal of a.out and COFF support for sparc

[John Paul Adrian Glaubitz]

Hello!

binutils/bfd recently removed a.out and COFF support for sparc [1].

Unfortunately, this means that we are no longer able to built GRUB
or SILO for sparc/sparc64 which need to be built as a.out binaries
as the Open Boot Firmware requires them to be in a.out format [2].

I would therefore like to ask to start a discussion about a potential
reversal of this commit as I don't think we can forgo being able
to build a bootloader on sparc/sparc64.

Also, since m68k is still very actively maintained (there is even
LLVM support in the works now) and since AmigaOS uses COFF, I would
to ask for the a.out and COFF support for m68k to be reinstated
as well [3].

Thanks,
Adrian

> [1] 
> https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;a=commit;h=c9098af41e3246586a30f4f0bdb0ee4367e9a5e7
> [2] https://docs.oracle.com/cd/E19457-01/801-7042/801-7042.pdf
> [3] 
> https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;a=commit;h=dc12032bca08554cf0a72d224e44f755f7789ff3

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