Comment # 1 on bug 1072055 from Luke Jones

This is correct behaviour - if someone is developing on a limited architecture
such as ARM and is writing only small/basic programs/embedded they will not
need the rust-std libs.

The libs contain such things as the String and Vec data types and macros such
as println!. 

Neither of these (and more) are required functionality for writing a rust
program, especially not for embedded applications where space use is critical.

Closing as not a bug.