* winbase.h: Semi-reinstantiate to workaround lack inline assembler

implementation of InterlockedCompareExchange for i686 in Mingw64
	headers.
	* pinfo.cc (pinfo::init): Remove unused variable mapaddr.

winsup/cygwin/winbase.h

@@ -0,0 +1,35 @@
+/* winbase.h
+
+   Copyright 2002, 2003, 2004, 2008, 2009, 2012 Red Hat, Inc.
+
+This software is a copyrighted work licensed under the terms of the
+Cygwin license.  Please consult the file "CYGWIN_LICENSE" for
+details. */
+
+#include_next "winbase.h"
+
+#ifndef _WINBASE2_H
+#define _WINBASE2_H
+
+#ifndef __x86_64__
+extern __inline__ LONG
+ilockcmpexch (volatile LONG *t, LONG v, LONG c)
+{
+  return
+  ({
+    register LONG ret __asm ("%eax");
+    __asm __volatile ("lock cmpxchgl %2, %1"
+	: "=a" (ret), "=m" (*t)
+	: "r" (v), "m" (*t), "0" (c)
+	: "memory");
+    ret;
+  });
+}
+
+#undef InterlockedCompareExchange
+#define InterlockedCompareExchange ilockcmpexch
+#undef InterlockedCompareExchangePointer
+#define InterlockedCompareExchangePointer(d,e,c) \
+    (PVOID)InterlockedCompareExchange((LONG volatile *)(d),(LONG)(e),(LONG)(c))
+#endif /* !__x86_64 */
+#endif /*_WINBASE2_H*/