pedestrianlove / Compiler_Cross

tags: compiler hw thu

Compiler: Cross Compiler

1. 打開vacs

2. 進入su更新軟體並安裝需要的library

sudo su

apt update

apt upgrade

apt install libgmp-dev libmpfr-dev libmpc-dev texinfo

3. 取得原始碼

• 使用aria2取得最新的原始碼，以在稍後的編譯設定參數。
• 建議可順便安裝tmux使其可以同時執行多個工作。

apt install build-essential flex bison aria2

mkdir /opt/cross_arm

mkdir /opt/src && cd /opt/src

• 新開一檔在/opt/src/sources，貼入下面內容， 存檔離開。

https://github.com/bminor/binutils-gdb/archive/refs/heads/master.zip
https://github.com/bminor/newlib/archive/refs/heads/master.zip
https://github.com/gcc-mirror/gcc/archive/refs/heads/master.zip

• 輸入下面指令：

aria2c -i sources -j4

unzip '*.zip'

mv binutils-gdb-master binutils

mv gcc-master gcc

mv newlib-master newlib

4. 建立資料夾並設定編譯參數

export TOOL_PATH=/opt/cross_arm/

export SOURCE_PATH=/opt/src/

export PATH=$TOOL_PATH/bin:$PATH

export LIBC_HEADERS=$SOURCE_PATH/newlib/newlib/libc/include

5. 使用./configure產生Makefile，並使用make編譯

• binutils

cd /opt/src/binutils

./configure --target=arm-elf-eabi --prefix=$TOOL_PATH --enable-interwork --enable-multilib --with-gnu-as --with-gnu-ld --disable-nls

make all install

• gcc

cd /opt/src/gcc

./configure --target=arm-elf-eabi --prefix=$TOOL_PATH --enable-interwork --enable-multilib --enable-languages="c,c++" --with-float=soft --with-newlib --with-headers=$LIBC_HEADERS --disable-shared --with-gnu-as --with-gnu-ld --with-system-zlib

make install-gcc

• newlib

cd /opt/src/newlib

./configure

make all && make install

4. 寫一個簡單的程式(以Hello World為例):

#include <stdio.h>
#include <stdlib.h>

int main ()
{
    printf ("Hello World!\n");
}

• 存成test.c

5. 使用cross-compiler編譯成armv7的assembly:

/opt/cross_arm/bin/arm-elf-eabi-gcc -S test.c

6. 得到arm的組合語言(test.s):