Need replacement for deprecated arrays in error handling

I am modifying an old code, where it uses the deprecated sys_errlist and sys_nerr which are deprecated. Can someone tell me its replacement?

Also it will be great, if someone tells us about its functionality.

Here is the code:

37 static const char *
38 stringErrorReport(void)
39 {
40 #if ( defined(sgi) )
41         return strerror(oserror());
42 #elif ( defined(_AIX) )
43         return strerror(errno);
44 #else
45         if ( errno > 0 && errno < sy开发者_如何学Cs_nerr )
46                 return sys_errlist[errno];
47         else
48                 return "Unknown error.\n";
49 #endif
50 }

Let me know how to replace the deprecated sys_nerr and sys_errlist[ ]

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This function is a wrapper around strerror(), and tries to supply it's own replacement on systems where it assumes strerror() is not available. If even sys_errlist and sys_nerr are not available, it fails. But it has at least tried ...