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Subject: Re: [PATCH][gdb] Fix -Wstrict-null-sentinel warnings
To: Tom de Vries <tdevries@suse.de>, Tom Tromey <tom@tromey.com>
Cc: Christian Biesinger <cbiesinger@google.com>, gdb-patches <gdb-patches@sourceware.org>
References: <20200207113429.GA6532@delia> <CAPTJ0XHj9PFCgnZNFGS-+RwGmLgyx-29xUZ+kUY3SBnSwTv=dg@mail.gmail.com> <e28fb7eb-bc71-e597-17f4-0d0c88e18512@suse.de> <7a8ea599-5254-46be-95b3-fa2af134656d@simark.ca> <99e7c8e5-8662-5b66-9d05-6ec3581b08bd@suse.de> <87v9ofx4s8.fsf@tromey.com> <5588f044-4f8b-ff32-070a-aacf7932671f@suse.de>
From: Simon Marchi <simark@simark.ca>
Message-ID: <0e65dcad-227e-1612-7d7d-f6de9db40493@simark.ca>
Date: Mon, 10 Feb 2020 14:08:00 -0000
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On 2020-02-10 5:18 a.m., Tom de Vries wrote:
> [ was: Re: [PATCH][gdb] Mention CU offset for <artifical> if verbose ]
> 
> On 09-02-2020 14:35, Tom Tromey wrote:
>>>>>>> "Tom" == Tom de Vries <tdevries@suse.de> writes:
>>
>> Tom> +      debug_filename.reset (concat (artificial, "@",
>> Tom> +				    sect_offset_str (per_cu->sect_off), NULL));
>>
>> When passing NULL to concat, you either need nullptr or (char *) NULL.
> 
> Fixed in attached patch.
> 
> OK for trunk?

I think we usually put a space after the cast:

  (char *) NULL

Also, if we want to enforce this warning, it should be added to gdb/warning.m4.  Makefiles
in gdb/ and gdbserver/ should be re-generated.  gdbsupport/ doesn't use AM_GDB_WARNINGS at
the moment.

Simon