# `Loongnix`上编译安装Rust

在`Loongarch`架构上基于`rustc-1.85-stable`版本编译安装`rustc-1.86-Nightly`版本。

##  编译安装

### 安装`rustc-1.85-stable`版本

1.   在龙芯社区下载1.85版本

```
wget  https://ftp.loongnix.cn/toolchain/rust/rust-1.85/2025-02-24/abi1.0/rust-1.85.0-loongarch64-unknown-linux-gnu.tar.xz
```

2.  解压并安装

```
mkdir ~/rust_1.85
tar  -xvf rust-1.85.0-loongarch64-unknown-linux-gnu.tar.xz  -C ~/rust_1.85
## 在解压目录下执行install.sh安装
chmod u+x  install.sh
./install.sh	无报错表示成功
```

3.   验证`rustc`的版本

```
默认会安装在/usr/local/bin下，执行--version验证版本
rustc  --version --verbose 
(venv) loongson@loongson-pc:~/rust/1.85$ /usr/local/bin/rustc --version  --verbose 
rustc 1.85.0 (51753f45f 2025-02-24)
binary: rustc
commit-hash: 51753f45fa686f44e1e7c88fe74be79d95282077
commit-date: 2025-02-24
host: loongarch64-unknown-linux-gnu
release: 1.85.0
LLVM version: 18.1.7
```

4.  验证cargo版本

```
默认会安装在/usr/local/bin下，执行--version验证版本
(venv) loongson@loongson-pc:~/rust/1.85$ /usr/local/bin/cargo --version  --verbose 
cargo 1.85.0 (83d2e3910 2025-02-21)
release: 1.85.0
commit-hash: 83d2e391040558e2d1b6a2f67f9f14ce43d64c66
commit-date: 2025-02-21
host: loongarch64-unknown-linux-gnu
libgit2: 1.8.1 (sys:0.19.0 vendored)
libcurl: 8.9.0-DEV (sys:0.4.74+curl-8.9.0 vendored ssl:OpenSSL/1.1.1w)
ssl: OpenSSL 1.1.1w  11 Sep 2023
os: Linux 20.0.0 (DaoXiangHu) [64-bit]
```

5.  添加stable版本的相关库文件

```
wget https://rust-lang.loongnix.cn/dist/1.85.0/2025-02-24/rust-std-1.85.0-loongarch64-unknown-linux-gnu.tar.xz
## 找到 sysroot 路径
SYSROOT=$(/usr/local/bin/rustc --print sysroot)
echo $SYSROOT

##复制标准库到 sysroot
# 解压后的目录结构通常是 rust-std-xxx/rust-std-loongarch64-unknown-linux-gnu/lib/rustlib/
# 需要把里面的内容复制到 $SYSROOT/lib/rustlib/
sudo cp -r rust-std-*/rust-std-loongarch64-unknown-linux-gnu/lib/rustlib/loongarch64-unknown-linux-gnu $SYSROOT/lib/rustlib/
```

### 安装`rustc-1.86-Nightly`版本

1.   在龙芯社区下载rustc-1.86的源码包

```
wget https://rust-lang.loongnix.cn/dist/1.86.0/2025-04-09/rust-src-1.86.0.tar.xz
## 解压
tar  -xvf  rust-src-1.86.0.tar.xz  -C /home/loongson/rust/1.86/
cd /home/loongson/rust/1.86/rustc-1.86.0-src
```

2.   编辑`config.toml`配置文件(没有该文件的话可以直接创建)

```
touch  config,toml
##  添加相应内容
(venv) loongson@loongson-pc:~/rust/1.86/rustc-1.86.0-src$ cat config.toml
# Use different pre-set defaults than the global defaults.
#
# See `src/bootstrap/defaults` for more information.
# Note that this has no default value (x.py uses the defaults in `config.example.toml`).
profile = 'dist'
change-id = 136941

[llvm]
#llvm-config = "/usr/local/llvm-20/bin/llvm-config"
download-ci-llvm = false
link-shared = false

[build]
jobs = 0
# Instead of downloading the src/stage0 version of Cargo specified, use
# this Cargo binary instead to build all Rust code
# If you set this, you likely want to set `rustc` as well.
cargo = '/usr/local/bin/cargo'

# Instead of downloading the src/stage0 version of the compiler
# specified, use this rustc binary instead as the stage0 snapshot compiler.
# If you set this, you likely want to set `cargo` as well.
rustc = '/usr/local/bin/rustc'

# Arguments passed to the `./configure` script, used during distcheck. You
# probably won't fill this in but rather it's filled in by the `./configure`
# script. Useful for debugging.

[install]

[rust]
channel = "nightly"
lto = "off" 

[target.loongarch64-unknown-linux-gnu]
llvm-config = "/usr/local/llvm-20/bin/llvm-config"

[dist]
```

- **因为是编译安装Nightly版本，一定要添加channel = “nightly”.**
- 关于其他配置或者配置说明，可直接问AI

3.   直接编译

```
## 修改配置文件之后，在解压目录下执行安装
python3.9  setup.py  build  --verbose
```

- 此过程耗时较长，可能会遇到问题，基础依赖问题可以问AI，直接处理。

4.   验证编译版本

```
无报错的话及编译完成，随后会在build/stage2*相关目录下生成对应的二进制文件。
loongson@loongson-pc:~/rust/1.86/rustc-1.86.0-src$ ls -l build/loongarch64-unknown-linux-gnu/stage2/bin/
总用量 16
-rwxr-xr-x 3 loongson loongson 21000 4月   7 03:28 rustc
loongson@loongson-pc:~/rust/1.86/rustc-1.86.0-src$ ls -l build/loongarch64-unknown-linux-gnu/stage2-tools-bin/
总用量 124884
-rwxr-xr-x 3 loongson loongson 34890680 4月   7 03:45 cargo
-rwxr-xr-x 3 loongson loongson  1731160 4月   3 08:53 cargo-clippy
-rwxr-xr-x 3 loongson loongson  1712104 4月   3 09:07 cargo-miri
-rwxr-xr-x 3 loongson loongson 17052896 4月   3 08:53 clippy-driver
-rwxr-xr-x 3 loongson loongson 12996064 4月   3 09:05 miri
-rwxr-xr-x 3 loongson loongson   732664 4月   3 08:16 rls
-rwxr-xr-x 3 loongson loongson 48955848 4月   3 08:34 rust-analyzer
-rwxr-xr-x 3 loongson loongson  1818720 4月   3 08:36 rust-analyzer-proc-macro-srv
-rwxr-xr-x 3 loongson loongson  8012928 4月   3 08:58 rustfmt
loongson@loongson-pc:~/rust/1.86/rustc-1.86.0-src$
## rustc的版本
loongson@loongson-pc:~/rust/1.86/rustc-1.86.0-src$ ./build/loongarch64-unknown-linux-gnu/stage2/bin/rustc  --version --verbose 
rustc 1.86.0-nightly (5e25f8045 2025-04-09) (built from a source tarball)
binary: rustc
commit-hash: 5e25f804539f9bea182946a5914494bbdfd56998
commit-date: 2025-04-09
host: loongarch64-unknown-linux-gnu
release: 1.86.0-nightly
LLVM version: 20.1.8
loongson@loongson-pc:~/rust/1.86/rustc-1.86.0-src$

## cargo的版本
loongson@loongson-pc:~/rust/1.86/rustc-1.86.0-src$ ./build/loongarch64-unknown-linux-gnu/stage2-tools-bin/cargo --version --verbose 
cargo 1.86.0-nightly (37587bcee 2025-04-09)
release: 1.86.0-nightly
commit-hash: 37587bceef35e93078508f9d00ab8c9d2004ecc1
commit-date: 2025-04-09
host: loongarch64-unknown-linux-gnu
libgit2: 1.9.0 (sys:0.20.0 vendored)
libcurl: 8.12.0-DEV (sys:0.4.79+curl-8.12.0 vendored ssl:OpenSSL/1.1.1d)
os: Linux 20.0.0 (DaoXiangHu) [64-bit]
loongson@loongson-pc:~/rust/1.86/rustc-1.86.0-src$ 
```

5.   设置环境变量

```
export PATH="$HOME/rust/1.86/rustc-1.86.0-src/build/loongarch64-unknown-linux-gnu/stage2/bin:$HOME/rust/1.86/rustc-1.86.0-src/build/loongarch64-unknown-linux-gnu/stage2-tools-bin:$PATH"
```

至此编译安装完成。。。。。