Building of mozilla-central fails on s390x machines with

 error[E0432]: unresolved imports `super::hidwrapper::_HIDIOCGRDESC`, `super::hidwrapper::_HIDIOCGRDESCSIZE`                                                         
   --> /home2/msirringhaus/mozilla/devel/mozilla-central/third_party/rust/authenticator/src/linux/hidraw.rs:11:25                                                    
    |                                                                                                                                                                
 11 | use super::hidwrapper::{_HIDIOCGRDESC, _HIDIOCGRDESCSIZE};                                                                                                     
    |                         ^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^^ no `_HIDIOCGRDESCSIZE` in `platform::hidwrapper`                                                      
    |                         |                                                                                                                                      
    |                         no `_HIDIOCGRDESC` in `platform::hidwrapper`                                                                                           
 error: aborting due to previous error                                                                                                                               
 For more information about this error, try `rustc --explain E0432`.                                                                                                 
 error: could not compile `authenticator`.  

The authenticator-rs crate does not support s390x.

I've created a pull request there, see: https://github.com/mozilla/authenticator-rs/pull/106

Either please update authenticator-rs if it gets accepted, or incorporate the patch itself.

This patch should fix the build until the crate itself gets updated.

Resolved in Bug 1621346. Thanks very much for the report and the patch!