DOCKER打包制作ARM64交叉编译环境，安装蓝牙库等

一、docker file制作基础docker基础镜像

FROM docker.1ms.run/library/ubuntu:24.04

ENV DEBIAN_FRONTEND=noninteractive

# 使用清华大学APT镜像源加速下载
RUN sed -i 's/archive.ubuntu.com/mirrors.tuna.tsinghua.edu.cn/g' /etc/apt/sources.list && \
    sed -i 's/security.ubuntu.com/mirrors.tuna.tsinghua.edu.cn/g' /etc/apt/sources.list && \
    apt-get update && \
    apt-get install -y \
    build-essential \
    cmake \
    git \
    pkg-config \
    gcc-aarch64-linux-gnu \
    g++-aarch64-linux-gnu \
    libbluetooth-dev \
    && rm -rf /var/lib/apt/lists/*

WORKDIR /workspace

ENV CC_aarch64-linux-gnu=aarch64-linux-gnu-gcc
ENV CXX_aarch64-linux-gnu=aarch64-linux-gnu-g++

CMD ["/bin/bash"]

执行docker部署

docker build -t test-cross-compiler .

执行并进入docker

root@ubuntu:/home/workSpace/DOCKER# docker run -it --rm test-cross-compiler

root@e95781ce11d8:/workspace# 
root@e95781ce11d8:/workspace# 

二、尝试编译，查看缺少工具链

make[2]: *** [CMakeFiles/test.dir/build.make:90: CMakeFiles/test.dir/src/broadcast_test.cpp.o] Error 1
make[2]: *** Waiting for unfinished jobs....
/workspace/test/src/network_test.cpp:13:10: fatal error: nlohmann/json.hpp: No such file or directory
   13 | #include <nlohmann/json.hpp>

缺少nlohmann库，安装：

apt update
apt install -y nlohmann-json3-dev

此时发现需要额外的 ARM64 libbluetooth-dev库，

/usr/lib/gcc-cross/aarch64-linux-gnu/13/../../../../aarch64-linux-gnu/bin/ld: cannot find -lbluetooth: No such file or directory
collect2: error: ld returned 1 exit status
make[2]: *** [CMakeFiles/test.dir/build.make:210: bin/test] Error 1
make[1]: *** [CMakeFiles/Makefile2:111: CMakeFiles/test.dir/all] Error 2

从ubuntu下载：

wget http://ports.ubuntu.com/ubuntu-ports/pool/main/b/bluez/libbluetooth3_5.72-0ubuntu5_arm64.deb
wget http://ports.ubuntu.com/ubuntu-ports/pool/main/b/bluez/libbluetooth-dev_5.72-0ubuntu5_arm64.deb

拷贝到docker环境中:

docker cp libbluetooth3_5.72-0ubuntu5_arm64.deb e95781ce11d8:workspace   a286db183044
docker cp libbluetooth-dev_5.72-0ubuntu5_arm64.deb e95781ce11d8:workspace

查看deb包内容：

root@e95781ce11d8:/workspace# dpkg -c libbluetooth3_5.72-0ubuntu5_arm64.deb | head -10

drwxr-xr-x root/root         0 2024-04-07 07:10 ./
drwxr-xr-x root/root         0 2024-04-07 07:10 ./usr/
drwxr-xr-x root/root         0 2024-04-07 07:10 ./usr/lib/
drwxr-xr-x root/root         0 2024-04-07 07:10 ./usr/lib/aarch64-linux-gnu/
drwxr-xr-x root/root         0 2024-04-07 07:10 ./usr/lib/aarch64-linux-gnu/bluetooth/
drwxr-xr-x root/root         0 2024-04-07 07:10 ./usr/lib/aarch64-linux-gnu/bluetooth/plugins/
-rw-r--r-- root/root     67800 2024-04-07 07:10 ./usr/lib/aarch64-linux-gnu/bluetooth/plugins/sixaxis.so
-rw-r--r-- root/root    271544 2024-04-07 07:10 ./usr/lib/aarch64-linux-gnu/libbluetooth.so.3.19.12
drwxr-xr-x root/root         0 2024-04-07 07:10 ./usr/share/
drwxr-xr-x root/root         0 2024-04-07 07:10 ./usr/share/doc/

因此，可以直接按当前文件夹解压，解压后自动到/usr/lib所在文件夹：

dpkg -x libbluetooth-dev_5.72-0ubuntu5_arm64.deb /
dpkg -x libbluetooth3_5.72-0ubuntu5_arm64.deb /

解压后查看是否部署完毕：

root@e95781ce11d8:/workspace# find /usr -name "libbluetooth.so*" 2>/dev/null

/usr/lib/x86_64-linux-gnu/libbluetooth.so.3
/usr/lib/x86_64-linux-gnu/libbluetooth.so
/usr/lib/x86_64-linux-gnu/libbluetooth.so.3.19.12
/usr/lib/aarch64-linux-gnu/libbluetooth.so.3
/usr/lib/aarch64-linux-gnu/libbluetooth.so
/usr/lib/aarch64-linux-gnu/libbluetooth.so.3.19.12

部署完毕，交叉编译ARM64程序，添加如下代码：

    # 设置交叉编译工具链路径（根据实际情况修改）
    set(TOOLCHAIN_PATH "/usr/bin" CACHE PATH "Cross compilation toolchain path")
    set(CMAKE_C_COMPILER ${TOOLCHAIN_PATH}/aarch64-linux-gnu-gcc)
    set(CMAKE_CXX_COMPILER ${TOOLCHAIN_PATH}/aarch64-linux-gnu-g++)

执行编译脚本，编译完毕

[100%] Linking CXX executable bin/test_bin
[100%] Built target test_bin

查看二进制是否为指定架构：

root@e95781ce11d8:/workspace/test/build/bin# readelf -h lnc_rid 

ELF Header:
  Magic:   7f 45 4c 46 02 01 01 00 00 00 00 00 00 00 00 00 
  Class:                             ELF64
  Data:                              2's complement, little endian
  Version:                           1 (current)
  OS/ABI:                            UNIX - System V
  ABI Version:                       0
  Type:                              DYN (Position-Independent Executable file)
  Machine:                           AArch64
  Version:                           0x1
  Entry point address:               0x6e80
  Start of program headers:          64 (bytes into file)
  Start of section headers:          395800 (bytes into file)
  Flags:                             0x0
  Size of this header:               64 (bytes)
  Size of program headers:           56 (bytes)
  Number of program headers:         9
  Size of section headers:           64 (bytes)
  Number of section headers:         30
  Section header string table index: 29

Machine字段显示AArch64，为目标ARM64架构，docker编译环境制作没问题

三、保存为tar.gz并打包，验证打包文件

删除原有容器

# 1. 先提交当前容器状态
docker commit a286db183044 test-complete:latest

# 2. 测试镜像内容
docker run -it --rm test-complete:latest /bin/bash -c "
    echo '=== 验证当前内容 ==='
    echo '工作目录:'; ls -la /workspace/
    echo '编译器:'; aarch64-linux-gnu-gcc --version | head -1
    echo 'json库:'; find /usr -name 'json.hpp' | head -1
    echo '蓝牙库:'; find /usr -name 'libbluetooth.so' | grep aarch64 | head -1
"

# 3. 保存镜像
docker save test-complete:latest | gzip > backup.tar.gz

# 4. 删除原镜像（模拟丢失）
docker rmi test-complete:latest

# 5. 重新加载验证
docker load -i test-complete.tar.gz

# 6. 再次验证内容是否完整
docker run -it --rm test-complete:latest /bin/bash -c "
    echo '=== 验证恢复的内容 ==='
    echo '工作目录:'; ls -la /workspace/
    echo '编译器:'; aarch64-linux-gnu-gcc --version | head -1
    echo 'json库:'; find /usr -name 'json.hpp' | head -1
    echo '✅ 所有内容都在!'
"

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