EmisonLu opened a new issue #364:
URL: https://github.com/apache/incubator-teaclave-sgx-sdk/issues/364
rust-sdk version: v1.1.4
rustc version: rustc 1.57.0-nightly (51e514c0f 2021-09-12)
When I use `cargo b` in the folder `sgx_align_struct_attribute`, the
following error is reported:
```
error[E0658]: use of unstable library feature 'proc_macro_is_available'
-->
/home/emison/.cargo/registry/src/mirrors.tuna.tsinghua.edu.cn-df7c3c540f42cdbd/proc-macro2-1.0.33/src/detection.rs:28:21
|
28 | let available = proc_macro::is_available();
| ^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: see issue #71436 <https://github.com/rust-lang/rust/issues/71436>
for more information
= help: add `#![feature(proc_macro_is_available)]` to the crate
attributes to enable
```
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