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Re: [musl] Building Bison 3.7 with musl (was Re: portability issues with


From: Rich Felker
Subject: Re: [musl] Building Bison 3.7 with musl (was Re: portability issues with unicodeio)
Date: Wed, 29 Jul 2020 20:05:28 -0400
User-agent: Mutt/1.5.21 (2010-09-15)

On Wed, Jul 29, 2020 at 06:23:19PM -0500, A. Wilcox wrote:
> Seeing some weird behaviour here building Bison 3.7 on musl libc.
> 
> Something seems to be "intelligent" enough to know that \u2022 is a
> bullet character, and is replacing it with "*" instead of ".", causing
> all the tests to fail:
> 
> awilcox on gwyn [17] bison: LC_ALL=C /bin/printf '\u2022\n' | od -t x1
> 0000000 2a 0a
> 0000002

I don't think the '*' has anything to do with it being a bullet
character. It's just the implementation-defined replacement character
musl's iconv uses.

I would guess the code in bison and coreutils printf is assuming the
non-conforming glibc behavior for iconv of returning an error if a
character from the input is not exactly representable in the output,
rather than making replacements and returning the number of inexact
conversions made.

Rich



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