mirror of https://github.com/python/cpython
closes bpo-34640: Remove the TANH_PRESERVES_ZERO_SIGN configure check. (GH-9206)
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@ -577,8 +577,6 @@ class CMathTests(unittest.TestCase):
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self.assertTrue(cmath.isinf(complex(INF, NAN)))
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@requires_IEEE_754
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@unittest.skipIf(sysconfig.get_config_var('TANH_PRESERVES_ZERO_SIGN') == 0,
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"system tanh() function doesn't copy the sign")
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def testTanhSign(self):
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for z in complex_zeros:
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self.assertComplexIdentical(cmath.tanh(z), z)
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@ -1355,8 +1355,6 @@ class MathTests(unittest.TestCase):
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self.assertTrue(math.isnan(math.tanh(NAN)))
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@requires_IEEE_754
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@unittest.skipIf(sysconfig.get_config_var('TANH_PRESERVES_ZERO_SIGN') == 0,
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"system tanh() function doesn't copy the sign")
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def testTanhSign(self):
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# check that tanh(-0.) == -0. on IEEE 754 systems
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self.assertEqual(math.tanh(-0.), -0.)
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@ -14163,53 +14163,6 @@ cat >>confdefs.h <<_ACEOF
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_ACEOF
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# On FreeBSD 6.2, it appears that tanh(-0.) returns 0. instead of
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# -0. on some architectures.
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether tanh preserves the sign of zero" >&5
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$as_echo_n "checking whether tanh preserves the sign of zero... " >&6; }
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if ${ac_cv_tanh_preserves_zero_sign+:} false; then :
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$as_echo_n "(cached) " >&6
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else
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if test "$cross_compiling" = yes; then :
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ac_cv_tanh_preserves_zero_sign=no
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else
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cat confdefs.h - <<_ACEOF >conftest.$ac_ext
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/* end confdefs.h. */
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#include <math.h>
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#include <stdlib.h>
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int main() {
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/* return 0 if either negative zeros don't exist
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on this platform or if negative zeros exist
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and tanh(-0.) == -0. */
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if (atan2(0., -1.) == atan2(-0., -1.) ||
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atan2(tanh(-0.), -1.) == atan2(-0., -1.)) exit(0);
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else exit(1);
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}
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_ACEOF
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if ac_fn_c_try_run "$LINENO"; then :
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ac_cv_tanh_preserves_zero_sign=yes
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else
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ac_cv_tanh_preserves_zero_sign=no
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fi
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rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
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conftest.$ac_objext conftest.beam conftest.$ac_ext
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fi
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fi
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_tanh_preserves_zero_sign" >&5
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$as_echo "$ac_cv_tanh_preserves_zero_sign" >&6; }
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if test "$ac_cv_tanh_preserves_zero_sign" = yes
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then
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$as_echo "#define TANH_PRESERVES_ZERO_SIGN 1" >>confdefs.h
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fi
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LIBS=$LIBS_SAVE
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# For multiprocessing module, check that sem_open
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# actually works. For FreeBSD versions <= 7.2,
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# the kernel module that provides POSIX semaphores
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27
configure.ac
27
configure.ac
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@ -4359,33 +4359,6 @@ AC_CHECK_FUNCS([acosh asinh atanh copysign erf erfc expm1 finite gamma])
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AC_CHECK_FUNCS([hypot lgamma log1p log2 round tgamma])
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AC_CHECK_DECLS([isinf, isnan, isfinite], [], [], [[#include <math.h>]])
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# On FreeBSD 6.2, it appears that tanh(-0.) returns 0. instead of
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# -0. on some architectures.
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AC_MSG_CHECKING(whether tanh preserves the sign of zero)
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AC_CACHE_VAL(ac_cv_tanh_preserves_zero_sign, [
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AC_RUN_IFELSE([AC_LANG_SOURCE([[
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#include <math.h>
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#include <stdlib.h>
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int main() {
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/* return 0 if either negative zeros don't exist
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on this platform or if negative zeros exist
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and tanh(-0.) == -0. */
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if (atan2(0., -1.) == atan2(-0., -1.) ||
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atan2(tanh(-0.), -1.) == atan2(-0., -1.)) exit(0);
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else exit(1);
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}
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]])],
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[ac_cv_tanh_preserves_zero_sign=yes],
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[ac_cv_tanh_preserves_zero_sign=no],
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[ac_cv_tanh_preserves_zero_sign=no])])
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AC_MSG_RESULT($ac_cv_tanh_preserves_zero_sign)
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if test "$ac_cv_tanh_preserves_zero_sign" = yes
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then
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AC_DEFINE(TANH_PRESERVES_ZERO_SIGN, 1,
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[Define if tanh(-0.) is -0., or if platform doesn't have signed zeros])
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fi
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LIBS=$LIBS_SAVE
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# For multiprocessing module, check that sem_open
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# actually works. For FreeBSD versions <= 7.2,
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# the kernel module that provides POSIX semaphores
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@ -1419,9 +1419,6 @@
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(which you can't on SCO ODT 3.0). */
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#undef SYS_SELECT_WITH_SYS_TIME
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/* Define if tanh(-0.) is -0., or if platform doesn't have signed zeros */
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#undef TANH_PRESERVES_ZERO_SIGN
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/* Library needed by timemodule.c: librt may be needed for clock_gettime() */
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#undef TIMEMODULE_LIB
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