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-rw-r--r--Misc/NEWS3
-rw-r--r--PC/pyconfig.h4
2 files changed, 7 insertions, 0 deletions
diff --git a/Misc/NEWS b/Misc/NEWS
index 94a2f8788a8..edb5f717511 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -103,6 +103,9 @@ Tests
Build
-----
+- Issue #20221: Removed conflicting (or circular) hypot definition when
+ compiled with VS 2010 or above. Initial patch by Tabrez Mohammed.
+
- Issue #20609: Restored the ability to build 64-bit Windows binaries on
32-bit Windows, which was broken by the change in issue #19788.
diff --git a/PC/pyconfig.h b/PC/pyconfig.h
index 299527db7d4..ccf75f37364 100644
--- a/PC/pyconfig.h
+++ b/PC/pyconfig.h
@@ -207,7 +207,11 @@ typedef int pid_t;
#define Py_IS_INFINITY(X) (!_finite(X) && !_isnan(X))
#define Py_IS_FINITE(X) _finite(X)
#define copysign _copysign
+
+/* VS 2010 and above already defines hypot as _hypot */
+#if _MSC_VER < 1600
#define hypot _hypot
+#endif
/* Side by Side assemblies supported in VS 2005 and VS 2008 but not 2010*/
#if _MSC_VER >= 1400 && _MSC_VER < 1600