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Add check for C99 round function to configure, and define 

a fallback function if round doesn't exist.
This commit is contained in:
Mark Dickinson 2009-04-18 13:58:18 +00:00
parent f498113f3f
commit f253786a80
5 changed files with 24 additions and 3 deletions
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4
Include/pymath.h
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@ -22,6 +22,10 @@ functions and constants
extern double copysign(double, double); extern double copysign(double, double);
#endif #endif
#ifndef HAVE_ROUND
extern double round(double);
#endif
#ifndef HAVE_ACOSH #ifndef HAVE_ACOSH
extern double acosh(double); extern double acosh(double);
#endif #endif

13
Python/pymath.c
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@ -69,6 +69,19 @@ copysign(double x, double y)
} }
#endif /* HAVE_COPYSIGN */ #endif /* HAVE_COPYSIGN */
#ifndef HAVE_ROUND
double
round(double x)
{
double absx, y;
absx = fabs(x);
y = floor(absx);
if (absx - y >= 0.5)
y += 1.0;
return copysign(y, x);
}
#endif /* HAVE_ROUND */
#ifndef HAVE_LOG1P #ifndef HAVE_LOG1P
#include <float.h> #include <float.h>

5
configure vendored
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@ -1,5 +1,5 @@
#! /bin/sh #! /bin/sh
# From configure.in Revision: 71274 . # From configure.in Revision: 71663 .
# Guess values for system-dependent variables and create Makefiles. # Guess values for system-dependent variables and create Makefiles.
# Generated by GNU Autoconf 2.61 for python 3.1. # Generated by GNU Autoconf 2.61 for python 3.1.
# #
@ -22310,7 +22310,8 @@ fi
for ac_func in acosh asinh atanh copysign expm1 finite hypot log1p
for ac_func in acosh asinh atanh copysign expm1 finite hypot log1p round
do do
as_ac_var=`echo "ac_cv_func_$ac_func" | $as_tr_sh` as_ac_var=`echo "ac_cv_func_$ac_func" | $as_tr_sh`
{ echo "$as_me:$LINENO: checking for $ac_func" >&5 { echo "$as_me:$LINENO: checking for $ac_func" >&5

2
configure.in
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@ -3337,7 +3337,7 @@ then
[Define if tanh(-0.) is -0., or if platform doesn't have signed zeros]) [Define if tanh(-0.) is -0., or if platform doesn't have signed zeros])
fi fi
AC_CHECK_FUNCS([acosh asinh atanh copysign expm1 finite hypot log1p]) AC_CHECK_FUNCS([acosh asinh atanh copysign expm1 finite hypot log1p round])
AC_CHECK_DECLS([isinf, isnan, isfinite], [], [], [[#include <math.h>]]) AC_CHECK_DECLS([isinf, isnan, isfinite], [], [], [[#include <math.h>]])
LIBS=$LIBS_SAVE LIBS=$LIBS_SAVE

3
pyconfig.h.in
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@ -521,6 +521,9 @@
/* Define if you have readline 4.0 */ /* Define if you have readline 4.0 */
#undef HAVE_RL_PRE_INPUT_HOOK #undef HAVE_RL_PRE_INPUT_HOOK
/* Define to 1 if you have the `round' function. */
#undef HAVE_ROUND
/* Define to 1 if you have the `select' function. */ /* Define to 1 if you have the `select' function. */
#undef HAVE_SELECT #undef HAVE_SELECT