Merged in autoconf branch.  This provides configuration via the autoconf
system.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@7014 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/Config/errno.h b/include/Config/errno.h
new file mode 100644
index 0000000..7c7f318
--- /dev/null
+++ b/include/Config/errno.h
@@ -0,0 +1,18 @@
+/*
+ * Header file: errno.h
+ *
+ * Description:
+ *	This header file is the autoconf replacement for errno.h (if it lives
+ *	on the system).
+ */
+
+#ifndef _CONFIG_ERRNO_H
+#define _CONFIG_ERRNO_H
+
+#include "Config/config.h"
+
+#ifdef HAVE_ERRNO_H
+#include <errno.h>
+#endif
+
+#endif