GCC运行汇编程序mac？

Question

我正在尝试在Mac上的终端中运行以下代码：

.section, .data

format_string:
   .asciz "My favorite number is %d!"

number:
  .long 786

.section, .text
.globl main

main:
  pushl number
 pushl $format_string  
 call printf 
  addl $8, %esp

  pushl $0
  call exit

此代码位于名为favorite.s

的文件中

我使用了命令“gcc favorite.s -m32”并看到以下消息：

Undefined symbols for architecture i386:
  "_main", referenced from:
      start in crt1.10.6.o
  "exit", referenced from:
      main in ccUKdD8O.o
  "printf", referenced from:
      main in ccUKdD8O.o
ld: symbol(s) not found for architecture i386
collect2: ld returned 1 exit status

我在这里做错了什么？感谢。

Answer 1

在Mac OS X上，符号前缀为下划线。在程序中_，main和exit前面添加printf，然后重试！