Android source build failed in ubuntu

[tony]

Installed source code,jdk6,ubuntu8.10,then execute

make

The build failed with error :
...
frameworks/base/core/res/res/values/public.xml:645: WARNING No comment for public symbol android:style/Widget.Spinner
frameworks/base/core/res/res/values/public.xml:657: WARNING No comment for public symbol android:style/Widget.TabWidget
frameworks/base/core/res/res/values/public.xml:639: WARNING No comment for public symbol android:style/Widget.TextView
frameworks/base/core/res/res/values/public.xml:646: WARNING No comment for public symbol android:style/Widget.TextView.PopupMenu
frameworks/base/core/res/res/values/public.xml:647: WARNING No comment for public symbol android:style/Widget.TextView.SpinnerItem
frameworks/base/core/res/res/values/public.xml:656: WARNING No comment for public symbol android:style/Widget.WebView
target Java: framework (out/target/common/obj/JAVA_LIBRARIES/framework_intermediates/classes)
Note: Some input files use or override a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
Note: Some input files use unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
target Dex: framework
make: *** [out/target/common/obj/JAVA_LIBRARIES/framework_intermediates/classes.dex] Killed

Who knows why the error will occurr?

[raozz]

it can be killed in low memory conditions.