[PATCH] gdb: fix IA64 build failure of linux-nat

[Simon Marchi]

On 2020-08-16 4:45 a.m., Sergei Trofimovich via Gdb-patches wrote:
> On Tue, 19 May 2020 15:00:41 -0700
> Kevin Buettner <kevinb@redhat.com> wrote:
> 
>> On Tue, 19 May 2020 22:27:10 +0100
>> Sergei Trofimovich via Gdb-patches <gdb-patches@sourceware.org> wrote:
>>
>>> From: Sergei Trofimovich <siarheit@google.com>
>>>
>>> On IA64 built failed as:
>>>
>>> ```
>>> ia64-linux-nat.c:352:29: error: 'gdbarch_num_regs' was not declared in this scope
>>>   352 |   if (regno < 0 || regno >= gdbarch_num_regs (gdbarch))
>>>       |                             ^~~~~~~~~~~~~~~~
>>> ```
>>>
>>> The fix includes "gdbarch.h" header where symbol is declared.
>>>
>>> 	* gdb/ia64-linux-nat.c: include "gdbarch.h" to declare used
>>> 	'gdbarch_num_regs'.  
>>
>> Okay, but please capitalize "include" in the ChangeLog entry prior
>> to pushing this change.
> 
> Attached v2-* patch with capitalization changes.
> 
> I don't have a 'gdb' write access yet (I think), but I do have GCC one.
> 
> Should I request 'gdb' access as well as specified in
>     https://sourceware.org/cgi-bin/pdw/ps_form.cgi ?

Yes, that would be useful if you plan on contributing regularly.  If it's just
a occasional patch, we can also push for you.  As you wish.

> 
> Thank you for the review! 

A few more styling nits:

> diff --git a/gdb/ChangeLog b/gdb/ChangeLog
> index 9cc7e44cba7..8865e6949d6 100644
> --- a/gdb/ChangeLog
> +++ b/gdb/ChangeLog
> @@ -4564,6 +4564,11 @@
>
>  	* sparc64-tdep.c (adi_tag_fd): Update call to target_fileio_open.
>
> +2020-05-19  Sergei Trofimovich  <siarheit@google.com>
> +
> +	* gdb/ia64-linux-nat.c: Include "gdbarch.h" to declare used
> +	'gdbarch_num_regs'.

The file path should be relative to the ChangeLog location, so here just "ia64-linux-nat.c".

Also, make sure that your new entry is at the top of the file (here, it's at line 4564), and
that you update the date to $TODAY when you push.  For these reasons, most people don't include
the ChangeLog bits in the patch directly, but just include it in the commit log (as you did).
Of course, when pushing the patch, then you need to insert it in the ChangeLog file.

Simon