diff -Naurp gcc/config/avr/avr-devices.c gcc/config/avr/avr-devices.c
--- gcc/config/avr/avr-devices.c 2011-10-28 14:31:05.000000000 +0530
+++ gcc/config/avr/avr-devices.c 2011-10-28 14:34:49.000000000 +0530
-@@ -275,6 +275,7 @@ const struct mcu_type_s avr_mcu_types[]
+@@ -274,6 +274,7 @@ const struct mcu_type_s avr_mcu_types[]
{ "avrxmega4", ARCH_AVRXMEGA4, NULL, 0, 0x2000, "x64d3" },
{ "atxmega64a3", ARCH_AVRXMEGA4, "__AVR_ATxmega64A3__", 0, 0x2000, "x64a3" },
{ "atxmega64a3u", ARCH_AVRXMEGA4, "__AVR_ATxmega64A3U__", 0, 0x2000, "x64a3u"},
diff -Naurp gcc/config/avr/t-avr gcc/config/avr/t-avr
--- gcc/config/avr/t-avr 2011-10-28 14:31:05.000000000 +0530
+++ gcc/config/avr/t-avr 2011-10-28 14:34:49.000000000 +0530
-@@ -285,6 +285,7 @@ MULTILIB_MATCHES = \
+@@ -284,6 +284,7 @@ MULTILIB_MATCHES = \
mmcu?avrxmega2=mmcu?atxmega32x1 \
mmcu?avrxmega4=mmcu?atxmega64a3 \
mmcu?avrxmega4=mmcu?atxmega64a3u \