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diff --git a/CyteKit/extern.mm b/CyteKit/extern.mm
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+/* Cydia - iPhone UIKit Front-End for Debian APT
+ * Copyright (C) 2008-2015  Jay Freeman (saurik)
+*/
+
+/* GNU General Public License, Version 3 {{{ */
+/*
+ * Cydia 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 of the License,
+ * or (at your option) any later version.
+ *
+ * Cydia 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 Cydia.  If not, see <http://www.gnu.org/licenses/>.
+**/
+/* }}} */
+
+#include <CyteKit/extern.h>
+#include <UIKit/UIKit.h>
+
+bool IsWildcat_;
+CGFloat ScreenScale_;
+
+__attribute__((__constructor__))
+void CyteKit_extern() {
+    UIScreen *screen([UIScreen mainScreen]);
+    if ([screen respondsToSelector:@selector(scale)])
+        ScreenScale_ = [screen scale];
+    else
+        ScreenScale_ = 1;
+
+    UIDevice *device([UIDevice currentDevice]);
+    if ([device respondsToSelector:@selector(userInterfaceIdiom)]) {
+        UIUserInterfaceIdiom idiom([device userInterfaceIdiom]);
+        if (idiom == UIUserInterfaceIdiomPad)
+            IsWildcat_ = true;
+    }
+}