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Re: [PATCH] add build-time option to use unicode9 character widths
On Wed, Nov 30, 2016 at 10:49 AM, Peter Stephenson
> On Tue, 29 Nov 2016 11:53:51 -0800
> Bart Schaefer <schaefer@xxxxxxxxxxxxxxxx> wrote:
>> On Nov 29, 5:21pm, Peter Stephenson wrote:
>> } Subject: Re: [PATCH] add build-time option to use unicode9 character width
>> } On Tue, 29 Nov 2016 00:42:27 -0700
>> } Joshua Rubin <joshua@xxxxxxxxxxxxxxxxxxx> wrote:
>> } > This patch adds support for unicode9 character widths.
>> } Thanks, that looks unproblematic as it's specially enabled --- there
>> } should be some other people who can try it out now it's in.
>> This is almost exactly what I was suggesting we should put in a module,
>> except with all those large tables loaded from a run-time external file
>> of some sort.
> There's a way forward, anyway.
> It's separately enabled for now which gives people who want it the
> ability to use it.
> If it migrates to a module, --enable-unicode9 can then force the module
> to be linked and loaded at boot. Loading from an external file is then
> a separate job. There currently isn't an obvious hook to how this gets
> linked in from a module, and as Sebastian has discovered the character
> analysis functions really need to be lightweight (though character width
> isn't among the most performance sensitive, I wouldn't think). Autoload
> seems pointless for something like this.
Hopefully glibc catches up to the spec sooner rather than later, or
does a runtime thing. It's kinda useless if only zsh supports it
anyway, since your terminal needs to also display it correctly.
> diff --git a/NEWS b/NEWS
> index 433703a..7ac144b 100644
> --- a/NEWS
> +++ b/NEWS
> @@ -7,6 +7,12 @@ Note also the list of incompatibilities in the README file.
> Changes from 5.2 to 5.3
> +It is possible to enable character width support for Unicode 9 by
> +congiuring with `--enable-unicode9'; this compiles in some additional
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