Android 源码编译出错解决思路

Android 源码编译出错
我的ubuntu是8.04,下载的是eclair版本的源码。第一次编译的时候通过了，后来再次编译的时候总是提示如下这个错误的。
============================================
PLATFORM_VERSION_CODENAME=REL
PLATFORM_VERSION=2.1
TARGET_PRODUCT=generic
TARGET_BUILD_VARIANT=eng
TARGET_SIMULATOR=
TARGET_BUILD_TYPE=release
TARGET_ARCH=arm
HOST_ARCH=x86
HOST_OS=linux
HOST_BUILD_TYPE=release
BUILD_ID=ERD79
============================================
Checking build tools versions...
build/core/copy_headers.mk:15: warning: overriding commands for target `out/target/product/generic/obj/include/libpv/getactualaacconfig.h'
build/core/copy_headers.mk:15: warning: ignoring old commands for target `out/target/product/generic/obj/include/libpv/getactualaacconfig.h'
/bin/bash: line 0: cd: sdk/layoutopt/app/src/resources: No such file or directory
sdk/layoutopt/app/src/这个目录下的确没有resources这个文件的，我手工加入一个空文件也还是不行的。最后我把out全部删除了，还是编译不通过的，提示如下错误。
PLATFORM_VERSION_CODENAME=REL
PLATFORM_VERSION=2.1
TARGET_PRODUCT=generic
TARGET_BUILD_VARIANT=eng
TARGET_SIMULATOR=
TARGET_BUILD_TYPE=release
TARGET_ARCH=arm
HOST_ARCH=x86
HOST_OS=linux
HOST_BUILD_TYPE=release
BUILD_ID=ERD79
============================================
Checking build tools versions...
build/core/copy_headers.mk:15: warning: overriding commands for target `out/target/product/generic/obj/include/libpv/getactualaacconfig.h'
build/core/copy_headers.mk:15: warning: ignoring old commands for target `out/target/product/generic/obj/include/libpv/getactualaacconfig.h'
/bin/bash: line 0: cd: sdk/layoutopt/app/src/resources: No such file or directory
diff: out/target/product/generic/obj/PACKAGING/updater_extensions_intermediates/register.inc.list: No such file or directory
find: src: No such file or directory
build/core/java.mk:9: *** bin: Target java module does not define any source or resource files. Stop.
网上查了好多资料，也没找到解决方法的。如果哪位大牛遇到同样的问题，麻烦告诉我的。先谢谢大家了。

------解决方案--------------------
1.用JDK1.5
2.build之前clean一下试试看
3.再不行的话，就svn st一下，看看你可能不小心改了什么文件。