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Date: Tue, 27 Oct 2020 13:08:17 -0400
From: Rich Felker <>
To: Mark Wielaard <>
Cc: Florian Weimer <>,,,
	√Črico Rolim <>,
	Max Rees <>
Subject: Re: Re: [QUESTION] Which fnmatch() functionality does
 elfutils depend on?

On Tue, Oct 27, 2020 at 04:04:44PM +0100, Mark Wielaard wrote:
> On Tue, 2020-10-27 at 10:19 +0100, Florian Weimer via Elfutils-devel
> wrote:
> > * Rich Felker:
> > 
> > > As I stated in my other reply, I'm opposed to that because it does not
> > > admit implementation with the same (very desirable) big-O properties,
> > > and the "extmatch" syntax is not widely known or widely used.
> > 
> > The syntax comes from ksh and is used in shell scripts.  (bash requires
> > the extglob option to enable it, which makes it easy to search for
> > instances.)
> Right, it is also adopted by zsh and some other shells. The big-O
> properties don't really matter in this case because fnmatch is used on
> small input strings like file names (or in this case section names).

They do because they're also in space, unless you want
exponential-time which is huge even on small inputs, and greater than
O(1) space requirement means the interface can't satisfy its contract
to return a conclusive result for valid inputs.


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