[issue34640] remove the configure check TANH_PRESERVES_ZERO_SIGN

[Benjamin Peterson]

New submission from Benjamin Peterson <benjamin at python.org>:

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.

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

_______________________________________
Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue34640>
_______________________________________