# riscv-gnu-toolchain

**Repository Path**: yushulx/riscv-gnu-toolchain

## Basic Information

- **Project Name**: riscv-gnu-toolchain
- **Description**: No description available
- **Primary Language**: Unknown
- **License**: Not specified
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 22
- **Forks**: 7
- **Created**: 2020-09-25
- **Last Updated**: 2024-12-31

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

RISC-V GNU Compiler Toolchain
=============================
此仓库的源码已经包含了riscv-gnu-toolchain源码中除了QEMU之外的子模块代码，方便网络不佳，又需要体验RISC-V的开发者。
如果GitHub访问速度好的，去https://github.com/riscv/riscv-gnu-toolchain 拿最新代码。
如果网速不好，又需要全部源码的，去https://gitee.com/mirrors/riscv-gnu-toolchain 拿每天同步的代码。

## 编译安装
接下来就按照官方教程编译。

### 依赖工具
Ubuntu
```
$ sudo apt-get install autoconf automake autotools-dev curl python3 libmpc-dev libmpfr-dev libgmp-dev gawk build-essential bison flex texinfo gperf libtool patchutils bc zlib1g-dev libexpat-dev
```
Fedora/CentOS/RHEL OS
```
$ sudo yum install autoconf automake python3 libmpc-devel mpfr-devel gmp-devel gawk  bison flex texinfo patchutils gcc gcc-c++ zlib-devel expat-devel
```

Arch Linux
```
$ pacman -Syyu autoconf automake curl python3 mpc mpfr gmp gawk build-essential bison flex texinfo gperf libtool patchutils bc zlib expat
```

OS X
```
$ brew install python3 gawk gnu-sed gmp mpfr libmpc isl zlib expat
```
### 编译GCC
编译`riscv64-unknown-elf-gcc`:

```
./configure --prefix=/opt/riscv
sudo make
```

编译64-bit`riscv64-unknown-linux-gnu-gcc`:

```
./configure --prefix=/opt/riscv
sudo make linux
```

编译32-bit:

```
./configure --prefix=/opt/riscv --with-arch=rv32gc --with-abi=ilp32d
sudo make linux
```

编译32-bit和64-bit:

```
./configure --prefix=/opt/riscv --enable-multilib
sudo make linux
```

这两个gcc的区别在于，elf-gcc是静态链接，linux-gnu-gcc是动态链接。

## 运行程序

### Simulator

首先编译安装pk: https://github.com/riscv/riscv-pk。

然后编译安装spike：https://github.com/riscv/riscv-isa-sim

编译程序

```
riscv64-unknown-elf-gcc -o hello hello.c
```

运行

```
spike $(which pk) hello
```

### Emulator
下载安装QEMU
https://www.qemu.org/download/#source

参考教程运行模拟环境：https://wiki.qemu.org/Documentation/Platforms/RISCV

另外也可以使用tinyemu: https://bellard.org/tinyemu/

Fedora镜像获取：https://dl.fedoraproject.org/pub/alt/risc-v/repo/virt-builder-images/images/

```
Fedora-Minimal-Rawhide-20200108.n.0-sda.raw.xz 
Fedora-Minimal-Rawhide-20200108.n.0-fw_payload-uboot-qemu-virt-smode.elf
```

解压镜像：

```
unxz Fedora-Minimal-Rawhide-*-sda.raw.xz
```

启动模拟器：

```
 qemu-system-riscv64 \
   -nographic \
   -machine virt \
   -smp 4 \
   -m 2G \
   -kernel Fedora-Minimal-Rawhide-*-fw_payload-uboot-qemu-virt-smode.elf \
   -bios none \
   -object rng-random,filename=/dev/urandom,id=rng0 \
   -device virtio-rng-device,rng=rng0 \
   -device virtio-blk-device,drive=hd0 \
   -drive file=Fedora-Minimal-Rawhide-20200108.n.0-sda.raw,format=raw,id=hd0 \
   -device virtio-net-device,netdev=usernet \
   -netdev user,id=usernet,hostfwd=tcp::10000-:22
```

登录用户名`riscv`，密码`fedora_rocks!`

拷贝程序到模拟器中：

```
scp <user-name>@<ip address>:/<file path> ./
```