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[perl #131506] sprintf: %f rounding different in 5.24.0 and 5.26.0

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From:
Tony Cook via RT
Date:
January 7, 2019 23:25
Subject:
[perl #131506] sprintf: %f rounding different in 5.24.0 and 5.26.0
Message ID:
rt-4.0.24-25063-1546903526-1268.131506-15-0@perl.org
On Mon, 07 Jan 2019 14:04:45 -0800, tonyc wrote:
> > Both win32/GNUmakefile and win32/makefile.mk now accommodate the
> > defining
> > of __USE_MINGW_ANSI_STDIO for "double" builds of perl, though the
> > default
> > is to NOT define that symbol. (I actually think it should be the
> > other way
> > around - ie defined by default, with an option to NOT define it.)
> > With "long double" builds, __USE_MINGW_ANSI_STDIO is defined by
> > default. I
> > don't think it would make sense to NOT define the symbol when
> > building with
> > "long double" support.
> 
> Are there any negatives to defining it?

And should they instead define _GNU_SOURCE?

https://rt.perl.org/Ticket/Display.html?id=130447#txn-1461711

https://gmplib.org/list-archives/gmp-bugs/2017-May/004162.html

Tony

---
via perlbug:  queue: perl5 status: rejected
https://rt.perl.org/Ticket/Display.html?id=131506

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