When you archive the SDKs, you should preserve the permission of the files

[Yi Wang]

The links in the framework became unreachable after I unarchive your online disk files.

If your using a command to archive those SDKs, you should add -p in the command line:

Useful link: http://www.linuxquestions.org/questions/linux-newbie-8/tar-preserve-the-symbolic-links-927221/

[stuff i'd rather not have attributed to me]

Duly noted.