Ubuntu中编译Android 源码出现Switch.pm出错信息的解决方法

在Ubuntu中编译Android JellyBean 4.2.1源码，出错以下出错信息：

1. Import includes file: out/target/product/mx3/obj/STATIC_LIBRARIES/libwebcore_intermediates/import_includes  
2. target Generated: libwebcore <= external/webkit/Source/WebCore/css/tokenizer.flex  
3. <span style="background-color: rgb(255, 255, 51);">Can't locate Switch.pm in @INC (you may need to install the Switch module)</span> (@INC contains: /etc/perl /usr/local/lib/perl/5.18.2 /usr/local/share/perl/5.18.2 /usr/lib/perl5 /usr/share/perl5 /usr/lib/perl/5.18 /usr/share/perl/5.18 /usr/local/lib/site_perl .) at external/webkit/Source/WebCore/make-hash-tools.pl line 23.  
4. BEGIN failed--compilation aborted at external/webkit/Source/WebCore/make-hash-tools.pl line 23.  
5. Can't locate Switch.pm in @INC (you may need to install the Switch module) (@INC contains: /etc/perl /usr/local/lib/perl/5.18.2 /usr/local/share/perl/5.18.2 /usr/lib/perl5 /usr/share/perl5 /usr/lib/perl/5.18 /usr/share/perl/5.18 /usr/local/lib/site_perl .) at external/webkit/Source/WebCore/make-hash-tools.pl line 23.  
6. BEGIN failed--compilation aborted at external/webkit/Source/WebCore/make-hash-tools.pl line 23.  
7. make: *** [out/target/product/mx3/obj/STATIC_LIBRARIES/libwebcore_intermediates/Source/WebCore/html/DocTypeStrings.cpp] Error 2  
8. make: *** Waiting for unfinished jobs....  
9. make: *** [out/target/product/mx3/obj/STATIC_LIBRARIES/libwebcore_intermediates/Source/WebCore/platform/ColorData.cpp] Error 2  
10. target Generated: libwebcore <= external/webkit/Source/WebCore/html/parser/HTMLEntityNames.in  

解决方法是安装perl的switch库：

1. sudo apt-get install libswitch-perl