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diff --git a/gcc/config/i386/cygwin2.c b/gcc/config/i386/cygwin2.c
new file mode 100644
index 00000000..c48e2a52
--- /dev/null
+++ b/gcc/config/i386/cygwin2.c
@@ -0,0 +1,66 @@
+/* Helper routines for cygwin-specific command-line parsing.
+   Contributed by Christopher Faylor (cgf@redhat.com)
+   Copyright 2003, 2007 Free Software Foundation, Inc.
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 3, or (at your option)
+any later version.
+
+GCC is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GCC; see the file COPYING3.  If not see
+<http://www.gnu.org/licenses/>.  */
+
+#include "config.h"
+#include "system.h"
+#include "coretypes.h"
+#include "tm.h"
+
+#include "safe-ctype.h"
+#include <string.h>
+
+/*
+static void remove_w32api (void);
+*/
+static void add_mingw (void);
+static void set_mingw (void) __attribute__ ((constructor));
+
+static void
+add_mingw (void)
+{
+  char **av;
+  char *p;
+  for (av = cvt_to_mingw; *av; av++)
+    {
+      int sawcygwin = 0;
+      while ((p = strstr (*av, "-cygwin")))
+	{
+	  char *over = p + sizeof ("-cygwin") - 1;
+	  memmove (over + 1, over, strlen (over));
+	  memcpy (p, "-mingw32", sizeof("-mingw32") - 1);
+	  p = ++over;
+	  while (ISALNUM (*p))
+	    p++;
+	  strcpy (over, p);
+	  sawcygwin = 1;
+	}
+      if (!sawcygwin && !strstr (*av, "mingw"))
+	strcat (*av, CYGWIN_MINGW_SUBDIR);
+    }
+}
+
+
+static void
+set_mingw (void)
+{
+  char *env = getenv ("GCC_CYGWIN_MINGW");
+  if (env && *env == '1')
+    add_mingw ();
+}