diff --git a/libc/arch-x86/include/machine/cdefs.h b/libc/arch-x86/include/machine/cdefs.h
new file mode 100644
index 0000000..6efee6a
--- /dev/null
+++ b/libc/arch-x86/include/machine/cdefs.h
@@ -0,0 +1,24 @@
+/*	$OpenBSD: cdefs.h,v 1.9 2005/11/24 20:46:45 deraadt Exp $	*/
+
+/*
+ * Written by J.T. Conklin <jtc@wimsey.com> 01/17/95.
+ * Public domain.
+ */
+
+#ifndef	_MACHINE_CDEFS_H_
+#define	_MACHINE_CDEFS_H_
+
+#if defined(lint)
+#define __indr_reference(sym,alias)	__lint_equal__(sym,alias)
+#define __warn_references(sym,msg)
+#define __weak_alias(alias,sym)		__lint_equal__(sym,alias)
+#elif defined(__GNUC__) && defined(__STDC__)
+#define __weak_alias(alias,sym)				\
+	__asm__(".weak " __STRING(alias) " ; "		\
+	    __STRING(alias) " = " __STRING(sym));
+#define __warn_references(sym,msg)			\
+	__asm__(".section .gnu.warning." __STRING(sym)	\
+	    " ; .ascii \"" msg "\" ; .text");
+#endif
+
+#endif /* !_MACHINE_CDEFS_H_ */