Add a script for updating avr-libc

Author: dylanmckay

update-avr-libc.sh

@@ -0,0 +1,19 @@
+#! /bin/sh -ea
+
+TEMP_CHECKOUT_NAME=avr-libc.new.in-progress
+
+SCRIPT_DIR=$(dirname $0)
+cd "${SCRIPT_DIR}"
+
+echo "Checking out the most recent avr-libc"
+svn co svn://svn.savannah.nongnu.org/avr-libc/trunk "${TEMP_CHECKOUT_NAME}"
+
+echo "Moving the old libc to a temporary directory"
+mv avr-libc avr-libc.old
+
+echo "Moving the new libc to the avr-libc directory"
+mv "${TEMP_CHECKOUT_NAME}/avr-libc" "avr-libc"
+rm -rf "${TEMP_CHECKOUT_NAME}"
+
+echo "Cleaning up the old avr-libc sources"
+rm -rf avr-libc.old