diff -Naurp gcc/config/avr/avr-devices.c gcc/config/avr/avr-devices.c
--- gcc/config/avr/avr-devices.c	2011-10-28 12:06:09.000000000 +0530
+++ gcc/config/avr/avr-devices.c	2011-10-28 12:15:49.000000000 +0530
@@ -147,6 +147,7 @@ const struct mcu_type_s avr_mcu_types[] 
   { "atmega163",            ARCH_AVR5, "__AVR_ATmega163__",         0, 0x0060, "m163" },
   { "atmega164a",           ARCH_AVR5, "__AVR_ATmega164A__",        0, 0x0100, "m164a" },
   { "atmega164p",           ARCH_AVR5, "__AVR_ATmega164P__",        0, 0x0100, "m164p" },
+  { "atmega164pa",          ARCH_AVR5, "__AVR_ATmega164PA__",       0, 0x0100, "m164pa" },
   { "atmega165",            ARCH_AVR5, "__AVR_ATmega165__",         0, 0x0100, "m165" },
   { "atmega165a",           ARCH_AVR5, "__AVR_ATmega165A__",        0, 0x0100, "m165a" },
   { "atmega165p",           ARCH_AVR5, "__AVR_ATmega165P__",        0, 0x0100, "m165p" },
@@ -154,6 +155,7 @@ const struct mcu_type_s avr_mcu_types[] 
   { "atmega168",            ARCH_AVR5, "__AVR_ATmega168__",         0, 0x0100, "m168" },
   { "atmega168a",           ARCH_AVR5, "__AVR_ATmega168A__",        0, 0x0100, "m168a" },
   { "atmega168p",           ARCH_AVR5, "__AVR_ATmega168P__",        0, 0x0100, "m168p" },
+  { "atmega168pa",          ARCH_AVR5, "__AVR_ATmega168PA__",       0, 0x0100, "m168pa" },
   { "atmega169",            ARCH_AVR5, "__AVR_ATmega169__",         0, 0x0100, "m169" },
   { "atmega169a",           ARCH_AVR5, "__AVR_ATmega169A__",        0, 0x0100, "m169a" },
   { "atmega169p",           ARCH_AVR5, "__AVR_ATmega169P__",        0, 0x0100, "m169p" },
@@ -164,6 +166,7 @@ const struct mcu_type_s avr_mcu_types[] 
   { "atmega16m1",           ARCH_AVR5, "__AVR_ATmega16M1__",        0, 0x0100, "m16m1" },
   { "atmega16u4",           ARCH_AVR5, "__AVR_ATmega16U4__",        0, 0x0100, "m16u4" },
   { "atmega32",             ARCH_AVR5, "__AVR_ATmega32__",          0, 0x0060, "m32" },
+  { "atmega32a",            ARCH_AVR5, "__AVR_ATmega32A__",         0, 0x0060, "m32a" },
   { "atmega323",            ARCH_AVR5, "__AVR_ATmega323__",         0, 0x0060, "m323" },
   { "atmega324a",           ARCH_AVR5, "__AVR_ATmega324A__",        0, 0x0100, "m324a" },
   { "atmega324p",           ARCH_AVR5, "__AVR_ATmega324P__",        0, 0x0100, "m324p" },
@@ -192,6 +195,7 @@ const struct mcu_type_s avr_mcu_types[] 
   { "atmega32u6",           ARCH_AVR5, "__AVR_ATmega32U6__",        0, 0x0100, "m32u6" },
   { "atmega406",            ARCH_AVR5, "__AVR_ATmega406__",         0, 0x0100, "m406" },
   { "atmega64",             ARCH_AVR5, "__AVR_ATmega64__",          0, 0x0100, "m64" },
+  { "atmega64a",            ARCH_AVR5, "__AVR_ATmega64A__",         0, 0x0100, "m64a" },
   { "atmega640",            ARCH_AVR5, "__AVR_ATmega640__",         0, 0x0200, "m640" },
   { "atmega644",            ARCH_AVR5, "__AVR_ATmega644__",         0, 0x0100, "m644" },
   { "atmega644a",           ARCH_AVR5, "__AVR_ATmega644A__",        0, 0x0100, "m644a" },
diff -Naurp gcc/config/avr/t-avr gcc/config/avr/t-avr
--- gcc/config/avr/t-avr	2011-10-28 12:04:00.000000000 +0530
+++ gcc/config/avr/t-avr	2011-10-28 12:15:49.000000000 +0530
@@ -178,6 +178,7 @@ MULTILIB_MATCHES = \
 	mmcu?avr5=mmcu?atmega163 \
 	mmcu?avr5=mmcu?atmega164a \
 	mmcu?avr5=mmcu?atmega164p \
+	mmcu?avr5=mmcu?atmega164pa \
 	mmcu?avr5=mmcu?atmega165 \
 	mmcu?avr5=mmcu?atmega165a \
 	mmcu?avr5=mmcu?atmega165p \
@@ -185,11 +186,13 @@ MULTILIB_MATCHES = \
 	mmcu?avr5=mmcu?atmega168 \
 	mmcu?avr5=mmcu?atmega168a \
 	mmcu?avr5=mmcu?atmega168p \
+	mmcu?avr5=mmcu?atmega168pa \
 	mmcu?avr5=mmcu?atmega169 \
 	mmcu?avr5=mmcu?atmega169a \
 	mmcu?avr5=mmcu?atmega169p \
 	mmcu?avr5=mmcu?atmega169pa \
 	mmcu?avr5=mmcu?atmega32 \
+	mmcu?avr5=mmcu?atmega32a \
 	mmcu?avr5=mmcu?atmega323 \
 	mmcu?avr5=mmcu?atmega324a \
 	mmcu?avr5=mmcu?atmega324p \
@@ -216,6 +219,7 @@ MULTILIB_MATCHES = \
 	mmcu?avr5=mmcu?atmega64rfa2 \
 	mmcu?avr5=mmcu?atmega64rfr2 \
 	mmcu?avr5=mmcu?atmega64  \
+	mmcu?avr5=mmcu?atmega64a \
 	mmcu?avr5=mmcu?atmega640 \
 	mmcu?avr5=mmcu?atmega644 \
 	mmcu?avr5=mmcu?atmega644a \