Re: [PATCH] support ptrdiff_t if it has the same storage size as int, but does not alias it

"'Robin Haberkorn' via scintilla-interest" <[email protected]> Thu, 09 Oct 2025 22:21:36 +0000

Newsgroups	gmane.comp.lib.scintilla.devel
Message-ID	<[email protected]>

On Fri Oct 10, 2025 at 00:08:54 GMT +03, Neil wrote:
> Still looks to be too much of a change when a simple -D__HAIKU__ can avoid 
> most of it. It increases the proportion of code in headers leading to worse 
> build times and is a bad direction to move in.

Even if we could assume that ptrdiff_t is always long on 32-bit Haiku
and therefore doesn't alias int that would be a lot trickier on NetBSD where
apparently some ports use long and others int.
Also, do we really know that on Haiku? They support armv7 as well.

Am I supposed to write some kind of custom Autoconf compile test to check
for the aliasability of ptrdiff_t with int if sizeof(ptrdiff_t) == sizeof(int)
and pass in -D__HAIKU__ on all platforms that do?
Ugly, but possible. Then we should at the very least give it a more
neutral name like RUNSTYLES_NEEDS_PTRDIFF or something.

Robin

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