环境准备

安装ubuntu系统和必要软件

首先安装好虚拟机和ubuntu18.04系统，然后安装必要软件包

sudo apt install -y git  libsdl1.2-dev libtool-bin libglib2.0-dev  libz-dev  libpixman-1-dev build-essential gdb gcc-multilib libfdt-dev python python3

配置qemu

git clone https://github.com/mit-pdos/6.828-qemu.git

cd qemu

# 下载dtc
git submodule update --init dtc

./configure --disable-kvm --disable-werror
# 若没有Error，则代表配置成功。

测试 Compiler Toolchain

cyl@ubuntu:~/qemu$  objdump -i
BFD header file version (GNU Binutils for Ubuntu) 2.30
elf64-x86-64 # 第二行出现elf64-x86-64或elf32-i386.
 (header little endian, data little endian)
  i386
elf32-i386
 (header little endian, data little endian)
  i386
elf32-iamcu
 (header little endian, data little endian)
  iamcu
elf32-x86-64
 (header little endian, data little endian)
  i386
a.out-i386-linux
 (header little endian, data little endian)
  i386


cyl@ubuntu:~/qemu$ gcc -m32 -print-libgcc-file-name
/usr/lib/gcc/x86_64-linux-gnu/7/32/libgcc.a 
# 输出 /usr/lib/gcc/i486-linux-gnu/version/libgcc.a 或者 /usr/lib/gcc/x86_64-linux-gnu/version/32/libgcc.a

参考链接