diff -Naurp gcc/config/avr/avr-devices.c gcc/config/avr/avr-devices.c
--- gcc/config/avr/avr-devices.c	2012-02-10 20:20:51.000000000 +0530
+++ gcc/config/avr/avr-devices.c	2012-02-10 20:21:25.000000000 +0530
@@ -305,6 +305,7 @@ const struct mcu_type_s avr_mcu_types[] 
   { "atxmega128d4", ARCH_AVRXMEGA6, "__AVR_ATxmega128D4__",         0, 0x2000, "x128d4" },
   { "atxmega192a3", ARCH_AVRXMEGA6, "__AVR_ATxmega192A3__",         0, 0x2000, "x192a3" },
   { "atxmega192a3u",ARCH_AVRXMEGA6, "__AVR_ATxmega192A3U__",        0, 0x2000, "x192a3u"},
+  { "atxmega192c3", ARCH_AVRXMEGA6, "__AVR_ATxmega192C3__",         0, 0x2000, "x192c3" },
   { "atxmega192d3", ARCH_AVRXMEGA6, "__AVR_ATxmega192D3__",         0, 0x2000, "x192d3" },
   { "atxmega256a3", ARCH_AVRXMEGA6, "__AVR_ATxmega256A3__",         0, 0x2000, "x256a3" },
   { "atxmega256a3u",ARCH_AVRXMEGA6, "__AVR_ATxmega256A3U__",        0, 0x2000, "x256a3u"},
diff -Naurp gcc/config/avr/t-avr gcc/config/avr/t-avr
--- gcc/config/avr/t-avr	2012-02-10 20:20:51.000000000 +0530
+++ gcc/config/avr/t-avr	2012-02-10 20:21:25.000000000 +0530
@@ -311,6 +311,7 @@ MULTILIB_MATCHES = \
 	mmcu?avrxmega6=mmcu?atxmega128d4 \
 	mmcu?avrxmega6=mmcu?atxmega192a3 \
 	mmcu?avrxmega6=mmcu?atxmega192a3u \
+	mmcu?avrxmega6=mmcu?atxmega192c3 \
 	mmcu?avrxmega6=mmcu?atxmega192d3 \
 	mmcu?avrxmega6=mmcu?atxmega256a3 \
 	mmcu?avrxmega6=mmcu?atxmega256a3u \