Avoid using common symbols in v850 libgloss

[Jeff Law]

On 3/19/2022 7:20 PM, Mike Frysinger wrote:
> On 09 Feb 2022 18:58, Jeff Law wrote:
>> I've had this lying around for probably a year or two at this point.
>> It just changes all the instance of "errno" from a common symbol to an
>> extern.  I can't offhand recall where the actual definition is, but it
>> certainly exists in the generic code.
>>
>> --- a/libgloss/v850/_exit.c
>> +++ b/libgloss/v850/_exit.c
>> @@ -3,7 +3,7 @@
>>   #include <sys/stat.h>
>>   #include "sys/syscall.h"
>>   
>> -int errno;
>> +extern int errno;
> why not just include errno.h ?  using `extern int errno;` is so pre-2000 :p.
:-0  I think i wrote it in the late 90s, so you're spot on.

In reality it didn't even cross my mind.   No objections if it gets 
changed, though ideally I'll never hack v850 newlib again :-)

jeff