• 交叉编译用于生成aarch64指令的GCC (9.2)


    参考

    Building GCC as a cross compiler for Raspberry Pi

    How to Build a GCC Cross-Compiler

     

    环境

    PC: ubuntu18.04 64位 (Intel(R) Core(TM) i7-4790 CPU @ 3.60GHz)

    GCC:gcc version 7.4.0 (Ubuntu 7.4.0-1ubuntu1~18.04.1)

     

    正文

    下面是我们交叉编译GCC用到的三个软件包:binutils,glibc以及gcc,下载链接如下:

    binutils:https://mirrors.nju.edu.cn/gnu/binutils/我下载的是binutils-2.32.tar.xz

    glibc:https://ftp.gnu.org/gnu/glibc/,我下载的是glibc-2.30.tar.xz

    gcc:https://github.com/gcc-mirror/gcc,我下载的是:gcc-9_2_0-release (切到tag标签,选择对应的tag)

     

    1、安装编译必备的软件包

    sudo apt update
    sudo apt upgrade
    sudo apt install build-essential gawk git texinfo bison flex

    2、新建路径,下面的所有操作都需要在一个终端里完成,以免环境变量发生变化

    mkdir -p /home/pengdl/work/GNU/mk_cross_compiler/
    cd /home/pengdl/work/GNU/mk_cross_compiler

     

    3、下载软件包并解压

    $ pwd
    /home/pengdl/work/GNU/mk_cross_compiler
    $ mkdir code
    $ cd code
    $ tar -xf ./binutils-2.32.tar.xz-
    $ tar -xf ./glibc-2.30.tar.xz-
    $ tar -xf ./gcc-9_2_0-release.tar.gz

    4 、进入刚解压的GCC源码目录,下载依赖的软件包

    cd gcc-9_2_0/
    ./contrib/download_prerequisites

    5、创建存放交叉编译可执行程序的路径,并加入PATH中

    cd /home/pengdl/work/GNU/mk_cross_compiler
    mkdir cross-gcc
    export PATH=/home/pengdl/work/GNU/mk_cross_compiler/cross-gcc/bin:$PATH

    6、安装内核头文件,这样将来就可以用自己的交叉编译工具编译调用对应kernel的系统调用的应用程序

    cd /home/pengdl/aarch64/android_kernel/linux-4.14
    make ARCH=arm64 INSTALL_HDR_PATH=/home/pengdl/work/GNU/mk_cross_compiler/cross-gcc/aarch64-linux-gnu headers_install

    建议按照下面的方式,将代码和编译放到不同的路径下进行!!!!

    7、编译安装binutils

    cd /home/pengdl/work/GNU/mk_cross_compiler
    mkdir build-binutils
    cd build-binutils/
    ../code/binutils-2.32/configure --prefix=/home/pengdl/work/GNU/mk_cross_compiler/cross-gcc --target=aarch64-linux-gnu --disable-multilib --with-arch=armv8
    make -j8
    make install

    下面开始编译glibc和gcc,由于这两个相互依赖,所以我们先部分编译gcc,然后部分编译glibc,最后全部编译gcc和glibc。

    8、部分编译gcc

    cd /home/pengdl/work/GNU/mk_cross_compiler
    mkdir build-gcc
    cd build-gcc
    ../code/gcc-9_2_0/configure --prefix=/home/pengdl/work/GNU/mk_cross_compiler/cross-gcc --target=aarch64-linux-gnu --enable-languages=c,c++ --disable-multilib
    make all-gcc -j8
    make install-gcc

    9、部分编译glibc

    cd /home/pengdl/work/GNU/mk_cross_compiler
    mkdir build-glibc
    cd build-glibc/
    ../code/glibc-2.30/configure --prefix=/home/pengdl/work/GNU/mk_cross_compiler/cross-gcc/aarch64-linux-gnu --build=$MACHINE --host=aarch64-linux-gnu --target=aarch64-linux-gnu --with-headers=/home/pengdl/work/GNU/mk_cross_compiler/cross-gcc/aarch64-linux-gnu/include --disable-multilib libc_cv_forced_unwind=yes
    
    make install-bootstrap-headers=yes install-headers
    make -j8 csu/subdir_lib
    install csu/crt1.o csu/crti.o csu/crtn.o  /home/pengdl/work/GNU/mk_cross_compiler/cross-gcc/aarch64-linux-gnu/lib
    aarch64-linux-gnu-gcc -nostdlib -nostartfiles -shared -x c /dev/null -o /home/pengdl/work/GNU/mk_cross_compiler/cross-gcc/aarch64-linux-gnu/lib/libc.so
    touch /home/pengdl/work/GNU/mk_cross_compiler/cross-gcc/aarch64-linux-gnu/include/gnu/stubs.h

    10、修改GCC 9.2的源码,否则编译会报错

    修改/home/pengdl/work/GNU/mk_cross_compiler/code/gcc-9_2_0/libsanitizer/asan/asan_linux.cc,在第77行加入如下代码:

    #ifndef PATH_MAX
    #define PATH_MAX 4096
    #endif

    11、接着部分编译gcc

    cd /home/pengdl/work/GNU/mk_cross_compiler/build-gcc
    make -j8 all-target-libgcc
    make install-target-libgcc

    12、全编译glibc

    cd /home/pengdl/work/GNU/mk_cross_compiler/build-glibc
    make -j8
    make install

    13、全编译gcc

    cd /home/pengdl/work/GNU/mk_cross_compiler/build-gcc
    make -j8
    make install

    14、测试

    首先查看一下我们自己编译生成的gcc版本:

    $ aarch64-linux-gnu-gcc -v
    Using built-in specs.
    COLLECT_GCC=aarch64-linux-gnu-gcc
    COLLECT_LTO_WRAPPER=/home/pengdl/work/GNU/mk_cross_compiler/cross-gcc/libexec/gcc/aarch64-linux-gnu/9.2.0/lto-wrapper
    Target: aarch64-linux-gnu
    Configured with: ../code/gcc-9_2_0/configure --prefix=/home/pengdl/work/GNU/mk_cross_compiler/cross-gcc --target=aarch64-linux-gnu --enable-languages=c,c++ --disable-multilib
    Thread model: posix
    gcc version 9.2.0 (GCC) 

    编写一个hello_world.c:

    $ cat hello_world.c 
    #include <stdio.h>
    
    int main(int argc, const char *argv[])
    {
            printf("Hello World
    ");
            return 0;
    }

    编译测试:

    $ aarch64-linux-gnu-gcc --static hello_world.c -o hello_world
    $ qemu-aarch64 ./hello_world
    Hello World

    完。

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  • 原文地址:https://www.cnblogs.com/pengdonglin137/p/11565115.html
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