Re: [Mingw-w64-public] Regarding strtold() bugs #711 and #725

sisyphus1 Sun, 01 Jul 2018 15:15:02 -0700

Hi Carl,

I'm already defining __USE_MINGW_ANSI_STDIO.


The messages you've quoted from the ChangeLog relate to strtod().
But strtod() works fine - the bug occurs only with strtold().

Is it just that strtold() needs to be aliased to __mingw_strtold() when__USE_MINGW_ANSI_STDIO is defned ?


Thanks for looking into it.

Cheers,
Rob

-----Original Message-----From: Carl Kleffner

Sent: Sunday, July 01, 2018 11:13 PM
To: mingw-w64-public@lists.sourceforge.net
Subject: Re: [Mingw-w64-public] Regarding strtold() bugs #711 and #725

I was too hasty, it's just the other way around.
Try to define __USE_MINGW_ANSI_STDIO to make automatically use of
__mingw_strtold instead of the strtold (msvcrt).

2018-07-01 15:03 GMT+02:00 Carl Kleffner <cmkleff...@gmail.com>:


mingw-w64/mingw-w64-headers/crt/ChangeLog:

2014-03-03  Ray Donnelly mingw.andr...@gmail.com
    * stdlib.h (strtod): Don't define it to __strtod if
    __USE_MINGW_STRTOX is defined.

mingw-w64-headers/crt/ChangeLog.2013:

2013-01-12  Jonathan Yong  <jo...@users.sourceforge.net>

* stdlib.h: Define __USE_MINGW_STRTOX if __USE_MINGW_ANSI_STDIO inuse.

    (strtod): Alias to __mingw_strtod if __USE_MINGW_STRTOX.
    (strtof): Likewise to __mingw_strtof.

This bug should only happen if either __USE_MINGW_ANSI_STDIO or

__USE_MINGW_STRTOX is defined. However, I am not sure if this should bethe

desired behaviour.

2018-07-01 11:27 GMT+02:00 <sisyph...@optusnet.com.au>:

Hi,

In relation to

https://sourceforge.net/p/mingw-w64/bugs/711/
and
https://sourceforge.net/p/mingw-w64/bugs/725/

I've just discovered that replacing the strtold() calls with calls to
__mingw_strtold() avoids the buggy behaviour.

Why would that be so ?
Does this observation open the door to these bugs with strtold() soon
being fixed ?
Are there any downsides to my using __mingw_strtold() as a replacement
for strtold() ?

I should add that I've tested this only on gcc version 8.1.0
(i686-posix-dwarf-rev0, Built by MinGW-W64 project) and gcc version 8.1.0
(x86_64-posix-seh-rev0, Built by MinGW-W64 project).
I haven't actually tested it on mingw-w64 ports of earlier versions of
gcc.

Cheers,
Rob

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Re: [Mingw-w64-public] Regarding strtold() bugs #711 and #725

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