If the libstd-rs recipe is not correctly embedding LVM bitcode in its
output, then it can produce a toolchain that appears to work until you
try building a project that requests LTO:
error: failed to get bitcode from object file for LTO (Bitcode section not found in object file)
Enable LTO for rust-hello-world to give us an easy watch to catch such
problems.
The old cargo.bbclass had no users in meta-rust and had lots of
problems (not least of which was lots of duplicated lines with
cargo_util.bbclass). Delete the old cargo.bbclass and replace it
entirely wiht cargo_util
Cody P Schafer
Dan Callaghan
Steven Walter
Doug Goldstein