Hello World 记录

1 binutils tools

ar  build static libray

strings  display the strings of the  object code

nm       display the symbol of the object file

readelf   display the struct of the object file  involoving the elf header

objdump  display the assembly of the .text section

2  the process of compilering

-----pre-processor------------compiler--------assembler---------linker---------

             -E                            -c                      -s                       ld