From 4f8b1384df0009675263efeb56cb489b79addb14 Mon Sep 17 00:00:00 2001
From: shirosaki <shirosaki@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Tue, 24 Jul 2012 15:12:26 +0000
Subject: Fix broken pow() on x64-mingw32

* include/ruby/win32.h (rb_w32_pow): add new function.
  We use powl() instead of broken pow() for x64-mingw32. This workaround
  fixes test failures related to floating point numeric.
  [ruby-core:46686] [Bug #6784]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@36522 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 include/ruby/win32.h | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

(limited to 'include/ruby/win32.h')

diff --git a/include/ruby/win32.h b/include/ruby/win32.h
index 5ec3d3dd66..7cbdb884df 100644
--- a/include/ruby/win32.h
+++ b/include/ruby/win32.h
@@ -764,4 +764,18 @@ uintptr_t rb_w32_asynchronize(asynchronous_func_t func, uintptr_t self, int argc
 }  /* extern "C" { */
 #endif
 
+#ifdef __MINGW64__
+/*
+ * Use powl() instead of broken pow() of x86_64-w64-mingw32.
+ * This workaround will fix test failures in test_bignum.rb,
+ * test_fixnum.rb and test_float.rb etc.
+ */
+static inline double
+rb_w32_pow(double x, double y)
+{
+    return powl(x, y);
+}
+#define pow rb_w32_pow
+#endif
+
 #endif /* RUBY_WIN32_H */
-- 
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