Date: Wed, 17 Sep 2025 22:53:11 +0300 From: Konstantin Belousov <kostikbel@gmail.com> To: "Josef 'Jeff' Sipek" <jeffpc@josefsipek.net> Cc: freebsd-hackers@freebsd.org Subject: Re: COMPAT_FREEBSD<ancient> Message-ID: <aMsRp8meBz7G8DbE@kib.kiev.ua> In-Reply-To: <aMsMyHevBpAraa2m@hvm> References: <aMlZu48yxBX0k6Pe@satis> <aMlg8FWoZCe5ibam@kib.kiev.ua> <aMsMyHevBpAraa2m@hvm>
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On Wed, Sep 17, 2025 at 03:32:24PM -0400, Josef 'Jeff' Sipek wrote: > On Tue, Sep 16, 2025 at 16:06:56 +0300, Konstantin Belousov wrote: > > On Tue, Sep 16, 2025 at 08:36:11AM -0400, Josef 'Jeff' Sipek wrote: > ... > > > Which brings up a question - at what point does it make sense to remove some > > > of this code? > > Never. > > Fair enough. > > > > IIUC, this code falls well outside the current policy around > > > ABI compatibility. > > How so? > > > > > So the only thing that the removal of these compat > > > layers should affect is source compatibility, but since this compat code is > > You do not understand what ABI compat is. > > Sorry, I rushed when I wrote my email and goofed. (1) I meant to say binary > compat not ABI compat, and (2) I conflated the ports policy with all of And what is the difference between binary compatibily and ABI? > FreeBSD. Not that it matters since this removal isn't happening :) > > > > about syscalls (at least according to sys/conf/NOTES) any code still using > > > these interfaces would have to explicitly invoke these compat syscalls and > > > not their new replacements. IOW, this should be a vanishingly small number > > > of programs. (As an additional data point, on amd64 GENERIC defines all of > > > them but MINIMAL starts with COMPAT_FREEBSD10.) > > > > We do run FreeBSD 1.0 binaries on HEAD, with the right config. I do not see > > a reason to break this. > > Interesting! Out of curiosity, what kind of programs are these? The 1.0 or 1.1 world in chroot. Last time I ran make in src/.
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