diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 5fd061871cb..35991916d20 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,11 @@
+2006-11-20  Anatoly Sokolov <aesok@post.ru>
+
+	PR target/18553
+	PR target/29449
+	* config/avr/avr.h (OBJECT_FORMAT_ELF): Define.
+
+	* config/avr/avr.h (DWARF2_DEBUGGING_INFO): Define.
+
 2006-11-20  J"orn Rennecke  <joern.rennecke@st.com>
 
 	* config.gcc (sh*-superh-elf): Add t-superh to tmake_file.
diff --git a/gcc/config/avr/avr.h b/gcc/config/avr/avr.h
index d34a6b640b4..48a59335ed4 100644
--- a/gcc/config/avr/avr.h
+++ b/gcc/config/avr/avr.h
@@ -918,3 +918,7 @@ mmcu=*:-mmcu=%*}"
 #define CR_TAB "\n\t"
 
 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
+
+#define DWARF2_DEBUGGING_INFO 1
+
+#define OBJECT_FORMAT_ELF