[issue34640] remove the configure check TANH_PRESERVES_ZERO_SIGN

[Benjamin Peterson]

Benjamin Peterson  added the comment:


New changeset 865c17fb28f8c3275fd94da6ee4ac51472ec874a by Benjamin Peterson in 
branch 'master':
closes bpo-34640: Remove the TANH_PRESERVES_ZERO_SIGN configure check. (GH-9206)
https://github.com/python/cpython/commit/865c17fb28f8c3275fd94da6ee4ac51472ec874a


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[issue34640] remove the configure check TANH_PRESERVES_ZERO_SIGN

[Mark Dickinson]

Mark Dickinson  added the comment:

> So, I think we should remove this configure check.

+1.

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[issue34640] remove the configure check TANH_PRESERVES_ZERO_SIGN

[Benjamin Peterson]

Change by Benjamin Peterson :


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stage:  -> patch review

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[issue34640] remove the configure check TANH_PRESERVES_ZERO_SIGN

[Benjamin Peterson]

New submission from Benjamin Peterson :

configure.ac currently has to check for a bug in FreeBSD 6.2:

# On FreeBSD 6.2, it appears that tanh(-0.) returns 0. instead of
# -0. on some architectures.
AC_MSG_CHECKING(whether tanh preserves the sign of zero)
...

FreeBSD 6.2 is nearing 12 years old. It looks like the FreeBSD 10 bot is 
passing this check. So, I think we should remove this configure check.

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messages: 325106
nosy: benjamin.peterson, mark.dickinson
priority: normal
severity: normal
status: open
title: remove the configure check TANH_PRESERVES_ZERO_SIGN

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