commit 591d0dab81465e5e0df5b5ba6b70e2ec74f25bbc
Author: John Klug <john.klug@multitech.com>
Date:   Tue Apr 11 17:35:38 2017 -0500

    Allow a DEFAULT ENV file, and get the MTD_SIZE from CONFIG_ENV_SIZE in uboot

diff --git a/configure.in b/configure.in
index 8fdc9ef..8f6a1db 100644
--- a/configure.in
+++ b/configure.in
@@ -15,12 +15,15 @@ required header missing]))
 
 AC_CHECK_LIB([z], [crc32], [], AC_MSG_ERROR([libz is required]))
 
-AC_DEFINE([DEBUG], 0, [set to 1 to enable debug])
+AC_DEFINE([DEBUG], 1, [set to 1 to enable debug])
 AC_DEFINE([MTD_ENV1], "/dev/mtd3", [set to the first u-boot env mtd])
 AC_DEFINE([MTD_ENV2], "/dev/mtd4", [set to the second (redundant) u-boot env mtd])
-AC_DEFINE([MTD_SIZE], 0x20000, [size of u-boot env mtd])
-AC_DEFINE([DEFAULT_ENV], ["bootargs=mem=64M console=ttyS0,115200 root=/dev/mtdblock8 ro rootfstype=jffs2\0" "bootcmd=nboot.jffs2 ${loadaddr} 0 ${kernel_addr}; bootm ${loadaddr}\0" "bootdelay=3\0" "baudrate=115200\0" "ethaddr=00:D0:A0:02:0D:E1\0" "ipaddr=192.168.2.1\0" "serverip=192.168.2.2\0" "netmask=255.255.255.0\0" "hostname=AT91SAM9G20\0" "loadaddr=0x21400000\0" "kernel_addr=0x000A0000\0" "\0"]
-, [default env if corrupt])
+
+AC_DEFINE([MAC_PATH],["/sys/devices/platform/mts-io/mac-eth"], [MAC_PATH for defining ethaddr= in boot environment])
+
+AC_DEFINE_UNQUOTED([DEFAULT_ENV],
+                   [$(cat ../DEFAULT_ENV.cfg | tr -d '\n')],
+                   [default environment values])
 
 AC_OUTPUT([Makefile src/Makefile])