Android invalid resource directory name:appcompat_v7\bin\res crunch

My app add the v7 lib under the libraries dependency. When I run the build script(under Eclipse), I got the following error:

[mergemanifest] Manifest merger disabled. Using project manifest only.
     [echo] Handling aidl files...
     [aidl] No AIDL files to compile.
     [echo] ----------
     [echo] Handling RenderScript files...
     [echo] ----------
     [echo] Handling Resources...
     [aapt] Generating resource IDs...
     [aapt] invalid resource directory name: D:\Workspace\appcompat_v7\bin\res crunch

I tried everything, but can't figure out how to solve it. Any help? This happens with all libraries I added, so I'm forced to use the .jar instead but v7 appears has no jar.