[RFA] Fix gdbserver build failure on arm-android.

[Pedro Alves]

On 05/14/2015 03:17 PM, Joel Brobecker wrote:

>> BTW, do you also trip on this one? :
>>
>>  https://sourceware.org/ml/gdb/2015-04/msg00025.html
> 
> We don't, at the moment. But we're planning on upgrading to a newer
> version in the next few weeks, so we might eventually hit that issue
> too. We don't know yet which version we'll target, so I can't say
> much more at the moment.

OK.  Seems the clash is with the group_from_gid / user_from_uid
BSD functions that do a similar thing from what our
versions do.  E.g.,:

 http://nixdoc.net/man-pages/openbsd/man3/group_from_gid.3.html
 https://developer.apple.com/library/ios/documentation/System/Conceptual/ManPages_iPhoneOS/man3/group_from_gid.3.html

"functions first appeared in 4.4BSD".

Though BSD's return a pointer to a statically allocated
buffer, while gdb's take a buffer pointer as argument.

As glibc doesn't support those BSD functions, we don't trip
on that on GNU/Linux.

I think we should just rename our symbols.  E.g.,
 group_from_gid -> gdb_group_from_gid
 user_from_uid -> gdb_user_from_uid

Thanks,
Pedro Alves