Failed to compile "syn" dependency #288
Description
I tried RMC on the virtio devices code:
https://github.com/firecracker-microvm/firecracker/tree/main/src/devices/src/virtiousing the following command line invocation as per PR #264:
RUST_BACKTRACE=1 RUSTFLAGS="-Z trim-diagnostic-paths=no -Z codegen-backend=gotoc --cfg=rmc" RUSTC=rmc-rustc cargo build --target x86_64-unknown-linux-gnu -j1
with RMC version: main-153-2021-07-02
I expected the code to compile succesfully.
Instead, this happened:
error[E0460]: found possibly newer version of crate `std` which `proc_macro2` depends on
--> /home/ANT.AMAZON.COM/sandreim/.cargo/registry/src/github.com-1ecc6299db9ec823/syn-1.0.55/src/lib.rs:304:1
|
304 | extern crate proc_macro2;
| ^^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: perhaps that crate needs to be recompiled?
= note: the following crate versions were found:
crate `std`: /home/ANT.AMAZON.COM/sandreim/rmc/build/x86_64-unknown-linux-gnu/stage1/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-5fb2fb5733ae0bb1.rlib
crate `std`: /home/ANT.AMAZON.COM/sandreim/rmc/build/x86_64-unknown-linux-gnu/stage1/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-5fb2fb5733ae0bb1.so
crate `proc_macro2`: /home/ANT.AMAZON.COM/sandreim/firecracker/build/cargo_target/debug/deps/libproc_macro2-de0f0702f4c2e4d3.rmeta