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Date: Wed, 29 Jul 2020 19:12:52 -0500
From: "A. Wilcox" <awilfox@...lielinux.org>
To: musl@...ts.openwall.com, bug-bison@....org
Subject: Re: Building Bison 3.7 with musl (was Re: portability issues
with unicodeio)
On 29/07/2020 19:05, Rich Felker wrote:
> 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.
Ah, ok.
> 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.
Actually, it's assuming iconv will replace \u2022 with '.', and failing
because it isn't:
@@ -1,9 +1,9 @@
State 0
- 0 $accept: . S $end
- 1 S: . 'a' A 'a'
- 2 | . 'b' A 'b'
- 3 | . 'c' c
+ 0 $accept: * S $end
+ 1 S: * 'a' A 'a'
+ 2 | * 'b' A 'b'
+ 3 | * 'c' c
'a' shift, and go to state 1
'b' shift, and go to state 2
This test gets more and more "fun" the more platforms it's ported to.
--arw
--
A. Wilcox (awilfox)
Project Lead, Adélie Linux
https://www.adelielinux.org
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