在Ubuntu上搭建RiscV交叉编译环境

• 参考文档

安装 RISC-V 交叉编译工具链 - USTC CECS 2023

• 安装依赖库

sudo apt update

sudo apt -y install autoconf automake autotools-dev curl python3 python3-pip
sudo apt -y install libmpc-dev libmpfr-dev libgmp-dev gawk
sudo apt -y install build-essential bison flex texinfo gperf libtool patchutils
sudo apt -y install bc zlib1g-dev libexpat-dev ninja-build git cmake libglib2.0-dev

• 下载代码及编译

我用的是Ubuntu22虚拟机，耗时很久。

git clone --recursive https://github.com/riscv/riscv-gnu-toolchain
cd riscv-gnu-toolchain
mkdir build
cd build

../configure --prefix=/opt/riscv64 --enable-multilib --target=riscv64-linux-multilib
sudo make linux -j 4

• 测试

$ echo 'export PATH=/opt/riscv64/bin:$PATH' >> ~/.bashrc
$ source ~/.bashrc

$ riscv64-unknown-linux-gnu-gcc --version
riscv64-unknown-linux-gnu-gcc (gc891d8dc23e) 13.2.0
Copyright (C) 2023 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.