From f253786a807967c2a7f289fa294b66d5dffadcdd Mon Sep 17 00:00:00 2001
From: Mark Dickinson <dickinsm@gmail.com>
Date: Sat, 18 Apr 2009 13:58:18 +0000
Subject: Add check for C99 round function to configure, and define a fallback
 function if round doesn't exist.

---
 Python/pymath.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

(limited to 'Python/pymath.c')

diff --git a/Python/pymath.c b/Python/pymath.c
index 2e049be870..eb06eb2244 100644
--- a/Python/pymath.c
+++ b/Python/pymath.c
@@ -69,6 +69,19 @@ copysign(double x, double y)
 }
 #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
 #include <float.h>
 
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