GNU logs - #78439, boring messages

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Subject: bug#78439: Accent insensitive grep
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Re-iterating the question on SO <https://stackoverflow.com/questions/209378=
64/> of applying an
accent-insensitive grep to text. (e.g: all accents of a letter 'e' should b=
e regarded as an ascii 'e').

The response by Adam Katz mentions:
> You should not expect equivalence classes to be portable as they are too =
arcane.

What's the stance of grep developers on this? are equivalence classes the
right tool to approach this? I see that they depend on LC_COLLATE, in
which case it would be possible to setup a custom locale that matches
digraphs.

In the example he gave, he also mentions:
> This matches all words like aei... [but won't match] =C3=A6i... it's quit=
e
> likely that digraphs are beyond the reach of even the best equivalence
> class map.

Is there a way to setup a locale without having to recompile glibc or
are these locale values hardcoded into programs using glibc?

Thanks,
Avid

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To: "Avid Seeker" <avidseeker@HIDDEN>
Subject: bug#78439: Acknowledgement (Accent insensitive grep)
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Subject: bug#78439: Accent insensitive grep
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On 2025-05-14 22:49, Avid Seeker via Bug reports for GNU grep wrote:

> are equivalence classes the
> right tool to approach this?

They're supposed to be, yes ...

> I see that they depend on LC_COLLATE, in
> which case it would be possible to setup a custom locale that matches
> digraphs.

... though you're venturing into uncharted territory here. Please let us 
know of any monsters you find.

> Is there a way to setup a locale without having to recompile glibc

Yes, use localedef.

Last modified: Thu, 15 May 2025 16:30:02 UTC

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