toml
akira@taniguchieinoMacBook-Pro-2 horobi_gengar % cargo stylus check
Building project with Cargo.toml version: 0.1.9
   Compiling proc-macro2 v1.0.88
   Compiling paste v1.0.15
   Compiling crunchy v0.2.2
   Compiling unicode-ident v1.0.12
   Compiling cfg-if v1.0.0
   Compiling generic-array v0.14.7
   Compiling typenum v1.17.0
   Compiling proc-macro-error v1.0.4
   Compiling heck v0.5.0
   Compiling hashbrown v0.14.3
error[E0463]: can't find crate for `core`
  |
  = note: the `wasm32-unknown-unknown` target may not be installed
  = help: consider downloading the target with `rustup target add wasm32-unknown-unknown`

For more information about this error, try `rustc --explain E0463`.
error: could not compile `unicode-ident` (lib) due to 1 previous error
warning: build failed, waiting for other jobs to finish...
error: could not compile `cfg-if` (lib) due to 1 previous error
cargo build command failed
akira@taniguchieinoMacBook-Pro-2 horobi_gengar % rustc --explain E0152

zsh: suspended  rustc --explain E0152
akira@taniguchieinoMacBook-Pro-2 horobi_gengar % rustup target add wasm32-unknown-unknown
info: downloading component 'rust-std' for 'wasm32-unknown-unknown'
info: installing component 'rust-std' for 'wasm32-unknown-unknown'

rust
cd cd ~/.cargo/registry/src/index.crates.io-*/openzeppelin-stylus-0.1.0/

そしてlib.rsを修正


/*!
# OpenZeppelin Contracts for Stylus

A library for secure smart contract development written in Rust for
[Arbitrum Stylus](https://docs.arbitrum.io/stylus/stylus-gentle-introduction).
This library offers common smart contract primitives and affordances that take
advantage of the nature of Stylus.

## Usage

To start using it, add `openzeppelin-stylus` to your `Cargo.toml`, or simply run
`cargo add openzeppelin-stylus`.

```toml
[dependencies]
openzeppelin-stylus = "x.x.x"
```

We recommend pinning to a specific version -- expect rapid iteration.

Once defined as a dependency, use one of our pre-defined implementations by
importing them:

```ignore
use openzeppelin_stylus::token::erc20::Erc20;

sol_storage! {
    #[entrypoint]
    struct MyContract {
        #[borrow]
        Erc20 erc20;
    }
}

#[public]
#[inherit(Erc20)]
impl MyContract { }
```
*/

#![allow(clippy::pub_underscore_fields, clippy::module_name_repetitions)]
#![cfg_attr(not(feature = "std"), no_std, no_main)]
#![deny(rustdoc::broken_intra_doc_links)]
extern crate alloc;

// ここをコメントアウト！！！！！
// #[global_allocator]
// static ALLOC: mini_alloc::MiniAlloc = mini_alloc::MiniAlloc::INIT;

pub mod access;
pub mod token;
pub mod utils;

// ここをコメントアウト！！！！！
// #[cfg(target_arch = "wasm32")]
// #[panic_handler]
// fn panic(_info: &core::panic::PanicInfo) -> ! {
//     loop {}
// }

toml
[package]
name = "stylus-hello-world"
version = "0.1.9"
edition = "2021"
license = "MIT OR Apache-2.0"
homepage = "https://github.com/OffchainLabs/stylus-hello-world"
repository = "https://github.com/OffchainLabs/stylus-hello-world"
keywords = ["arbitrum", "ethereum", "stylus", "alloy"]
description = "Stylus hello world example"

[dependencies]
alloy-primitives = "=0.7.6"
alloy-sol-types = "=0.7.6"
mini-alloc = "0.4.2"
stylus-sdk = { version = "0.6.0", default-features = false } // default-features = falseを追加
hex = "0.4.3"
dotenv = "0.15.0"
openzeppelin-stylus = "0.1.0"

[dev-dependencies]
tokio = { version = "1.12.0", features = ["full"] }
ethers = "2.0"
eyre = "0.6.8"

[features]
export-abi = ["stylus-sdk/export-abi"]
debug = ["stylus-sdk/debug"]

// ここの下記3行を追加！
default = ["std"]
std = []
no_std = ["stylus-sdk/no_std"]

[[bin]]
name = "stylus-hello-world"
path = "src/main.rs"

[lib]
crate-type = ["lib", "cdylib"]

[profile.release]
codegen-units = 1
strip = true
lto = true
panic = "abort"
opt-level = "s"

// ここの下記2行を追加！
[build-dependencies]
stylus-sdk = { version = "0.6.0", default-features = false }