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From: Keith Thompson <Keith.S.Thompson+u@gmail.com>
Newsgroups: comp.lang.c
Subject: Re: 8 bit cpu
Date: Tue, 23 Dec 2025 19:35:03 -0800
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kalevi@kolttonen.fi (Kalevi Kolttonen) writes:
[...]
> I do not know whether C standards permit 8-bit ints,

It does not.  C (up to C17) requires INT_MIN to be -32767 or lower,
and INT_MAX to be +32767 or higher.  (C23 changes the requirement
for INT_MIN from -32767 to -32768, and mandates 2's-complement for
signed integer types.)

>                                                      but
> cc65 is a real-world 6502 C cross-compiler available straight
> from the standard repositories on Fedora Linux 43 and FreeBSD 15.
>
> We can install cc65 and VICE emulator to do a simple test:
[...]

I have cc65 on my Ubuntu system.  Here's how I demonstrated the same
thing (that sizeof (int) is 2):

$ cat c.c
int SIZEOF_INT = sizeof (int);
$ cc65 c.c
$ cat c.s
;
; File generated by cc65 v 2.18 - Ubuntu 2.19-1
;
	.fopt		compiler,"cc65 v 2.18 - Ubuntu 2.19-1"
	.setcpu		"6502"
[7 lines deleted]
	.export		_SIZEOF_INT

.segment	"DATA"

_SIZEOF_INT:
	.word	$0002

$

-- 
Keith Thompson (The_Other_Keith) Keith.S.Thompson+u@gmail.com
void Void(void) { Void(); } /* The recursive call of the void */