diff -Naurp gcc/config/avr/avr-devices.c gcc/config/avr/avr-devices.c
--- gcc/config/avr/avr-devices.c	2011-10-28 11:44:14.000000000 +0530
+++ gcc/config/avr/avr-devices.c	2011-10-28 11:55:44.000000000 +0530
@@ -96,6 +96,7 @@ const struct mcu_type_s avr_mcu_types[] 
   { "attiny87",             ARCH_AVR25, "__AVR_ATtiny87__",         0, 0x0100, "tn87" },
   { "attiny48",             ARCH_AVR25, "__AVR_ATtiny48__",         0, 0x0100, "tn48" },
   { "attiny88",             ARCH_AVR25, "__AVR_ATtiny88__",         0, 0x0100, "tn88" },
+  { "attiny80",             ARCH_AVR25, "__AVR_ATtiny80__",         0, 0x0100, "tn80" },
   { "at86rf401",            ARCH_AVR25, "__AVR_AT86RF401__",        1, 0x0060, "86401" },
     /* Classic, > 8K, <= 64K +2-byte PC + { JMP/CALL }.  */
   { "avr3",                 ARCH_AVR3, NULL,                        0, 0x0060, "43355" },
diff -Naurp gcc/config/avr/t-avr gcc/config/avr/t-avr
--- gcc/config/avr/t-avr	2011-10-28 11:40:24.000000000 +0530
+++ gcc/config/avr/t-avr	2011-10-28 11:55:44.000000000 +0530
@@ -138,6 +138,7 @@ MULTILIB_MATCHES = \
 	mmcu?avr25=mmcu?attiny87 \
 	mmcu?avr25=mmcu?attiny48 \
 	mmcu?avr25=mmcu?attiny88 \
+	mmcu?avr25=mmcu?attiny80 \
 	mmcu?avr25=mmcu?at86rf401 \
 	mmcu?avr3=mmcu?at43usb355 \
 	mmcu?avr3=mmcu?at76c711 \