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--- ruby-2.0.0-p247.orig/missing/isinf.c 2011-05-15 13:55:52.000000000 +0200
+++ ruby-2.0.0-p247/missing/isinf.c 2013-10-24 09:18:55.000000000 +0200
@@ -5,6 +5,7 @@
#define _IEEE 1
#include <nan.h>
+
int
isinf(double n)
{
@@ -52,6 +53,8 @@ static double zero(void) { return 0.0; }
static double one (void) { return 1.0; }
static double inf (void) { return one() / zero(); }
+#undef isinf
+
int
isinf(double n)
{
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