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Doc: update rust information of STD #163

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Jan 20, 2025
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Doc: update rust information of STD #163

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17 changes: 10 additions & 7 deletions README.md
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Expand Up @@ -14,7 +14,8 @@ TrustZone applications with Rust's standard library (std) and many third-party
libraries (i.e., crates). Teaclave TrustZone SDK is a sub-project of [Apache
Teaclave (incubating)](https://teaclave.apache.org/).

Teaclave TrustZone SDK provides two development modes for Rust TAs: `no-std` and `std`.
Teaclave TrustZone SDK provides two development modes for Rust TAs: `no-std`
and `std`.
We recommend using `no-std` by default. For a detailed comparison, please refer
to [Comparison](#comparison).

Expand Down Expand Up @@ -60,18 +61,20 @@ branch (`main`), please refer to the
- Substantial reduction in binary size.

- **Cons**:
- Limited support for third-party crates. In the no-std mode, Trusted Applications
(TAs) are unable to utilize crates dependent on the standard library (std).
- Limited support for third-party crates. In the no-std mode, Trusted
Applications (TAs) are unable to utilize crates dependent on the standard
library (std).

#### `std`

- **Pros**:
- Enables the utilization of more third-party crates, including those requiring
`std`, such as `serde_json` and `rustls`, which are essential for functionality.
- Enables the utilization of more third-party crates, including those
requiring `std`, such as `rustls`, which are essential for functionality.

- **Cons**:
- Manual porting of `std` with infrequent updates. Currently using `std` version
`1.56.1` and `Rust` version `nightly-2021-09-20`. (Planned to update)
- Manual porting of `std` with infrequent updates. Currently using `std`
version `1.80.0` and `Rust` version `nightly-2024-05-14`, which might not
meet the MSRV requirements of some crates.

### Supported Examples

Expand Down