Re: Using localedef to define custom charmaps

[Florian Weimer <fweimer at redhat dot com>]

On 06/11/2018 07:53 PM, Carlos O'Donell wrote:
> On 06/11/2018 12:51 PM, Florian Weimer wrote:
> > On 06/11/2018 06:49 PM, Carlos O'Donell wrote:
> >
> > > However, once you've done the work of using the charmap to build
> > > the output locale data ... why do you need it anymore?
> > >
> > > Conversions will be handled by gconv converters after that.
> >
> > What if there's no gconv converter for my charmap?
>
> Are we talking in the abstract here?

Not quite.  I suggested a custom charmap as a way to customize 
transliteration for a character which is present in the destination 
character set:

  https://sourceware.org/bugzilla/show_bug.cgi?id=23076

If there are no custom charmaps, then obviously this will not work.

> I imagine some simple character maps could be automatically
> driven by the existing data.

We auto-generate gconv modules from charmaps for most (if not all) 8-bit 
character sets.  This is a bit unfortunate because the code is 
identical, and the overhead of loading the data via dlopen is quite 
large (mostly in terms of private RSS consumption).

Thanks,
Florian