在OS X (C, Cocoa)中获取CPU arch字符串

Question

如何在OS X中使用标准C库或Cocoa获取CPU架构字符串?

Answer 1

uname(3)

Answer 2

这里有一个作弊的方法:

#if defined(__i386__)
    return "i386";
#elif defined(__x86_64__)
    return "x86-64";
#elif defined(__arm__)
    return "arm";
// etc...
#else
# error "Unknown architecture!"
#endif

没有必要在运行时检查，因为每个体系结构都有一个单独的可执行映像。

Answer 3

From man 2 uname:

   #include <sys/utsname.h>
   int uname(struct utsname *buf);
  uname()  returns  system  information in the structure pointed to by buf. 
  The utsname struct is defined in
   <sys/utsname.h>:
       struct utsname {
           char sysname[];    /* Operating system name (e.g., "Linux") */
           char nodename[];   /* Name within "some implementation-defined
                                 network" */
           char release[];    /* OS release (e.g., "2.6.28") */
           char version[];    /* OS version */
           char machine[];    /* Hardware identifier */
       };
   The length of the arrays in a struct utsname is unspecified;
   the fields  are  terminated  by  a null byte ('').

提示:uname -m返回(struct utsname).machine