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isinf and isnan are macros, not functions; fix configure script

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to use AC_CHECK_DECLS instead of AC_CHECK_FUNCS for these.
(See discussion in issue #4506)
This commit is contained in:
Mark Dickinson 2009-01-04 13:57:26 +00:00
parent 04b272336d
commit d181e3a246
5 changed files with 224 additions and 16 deletions
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4
Include/pymath.h
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@ -87,7 +87,7 @@ extern double copysign(double, double);
* Note: PC/pyconfig.h defines Py_IS_NAN as _isnan
*/
#ifndef Py_IS_NAN
#ifdef HAVE_ISNAN
#ifdef HAVE_DECL_ISNAN
#define Py_IS_NAN(X) isnan(X)
#else
#define Py_IS_NAN(X) ((X) != (X))
@ -104,7 +104,7 @@ extern double copysign(double, double);
* Note: PC/pyconfig.h defines Py_IS_INFINITY as _isinf
*/
#ifndef Py_IS_INFINITY
#ifdef HAVE_ISINF
#ifdef HAVE_DECL_ISINF
#define Py_IS_INFINITY(X) isinf(X)
#else
#define Py_IS_INFINITY(X) ((X) && (X)*0.5 == (X))