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Re: Question on BIGGEST_ALIGNMENT in GCC on NetBSD/m68k



Hi,

On 13.6.2025 15.51, John Paul Adrian Glaubitz wrote:
On Fri, 2025-06-13 at 14:30 +0200, Geert Uytterhoeven wrote:
So you change the default alignment, bump all so-versions in userspace,
but keep the kernel-userspace ABI the same by adding explicit alignment
tags where needed? Old binaries keep on working, new binaries join
the ecosystem of anything that still builds on 32-bit big-endian ;-)

I think you're still missing the part that I'm not maintaining my own Linux
distribution meaning that I cannot bump SO versions or making any substantial
changes to the distributions.>
And I'm not sure why being able to run old binaries on a retro-computing architecture
is is so important for some people that they think it justifies making my life
miserable.

Wouldn't next upgrade completely break user's Debian system so it needs complete re-install?

If true, would separate m68k arch for 4-byte alignment be out of question, similarly how there have been different ARM arch variants?


	- Eero

PS. I was peripherally involved in the ARM VFP thing, in a Debian derivative that switched to use VFP before Debian did. So I know a bit how big thing such transition is, even with the Debian cross-compiling & boot-strapping support being much better now...


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