only define zero constant when it is used

12 years ago · c77e7a4f23
1 changed files with 2 additions and 0 deletions
--- a/Modules/_math.c
+++ b/Modules/_math.c
@ -22,7 +22,9 @@
 static const double ln2 = 6.93147180559945286227E-01;
 static const double two_pow_m28 = 3.7252902984619141E-09; /* 2**-28 */
 static const double two_pow_p28 = 268435456.0; /* 2**28 */
+#ifndef Py_NAN
 static const double zero = 0.0;
+#endif

 /* acosh(x)
 * Method :