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From: Andreas Schwab <schwab@linux-m68k.org>
To: Carlos O'Donell <carlos@redhat.com>
Cc: Joseph Myers <joseph@codesourcery.com>,  Florian Weimer <fweimer@redhat.com>,  GNU C Library <libc-alpha@sourceware.org>
Subject: Re: [PATCH v4] Fix -Os related build and test failures.
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Date: Tue, 01 Nov 2016 09:17:00 -0000
In-Reply-To: <428b3741-9228-68f3-76ec-d042e4075ded@redhat.com> (Carlos
	O'Donell's message of "Sat, 29 Oct 2016 23:51:24 -0400")
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On Okt 30 2016, Carlos O'Donell <carlos@redhat.com> wrote:

> diff --git a/resolv/res_send.c b/resolv/res_send.c
> index 6d46bb2..4ec8c1a 100644
> --- a/resolv/res_send.c
> +++ b/resolv/res_send.c
> @@ -664,7 +664,7 @@ send_vc(res_state statp,
>  	   a false-positive.
>  	 */
>  	DIAG_PUSH_NEEDS_COMMENT;
> -	DIAG_IGNORE_NEEDS_COMMENT (5, "-Wmaybe-uninitialized");
> +	DIAG_IGNORE_Os_NEEDS_COMMENT (5, "-Wmaybe-uninitialized");
>  	int resplen;
>  	DIAG_POP_NEEDS_COMMENT;
>  	struct iovec iov[4];

That breaks powerpc and s390.

res_send.c: In function 'send_vc':
res_send.c:668:6: error: 'resplen' may be used uninitialized in this function [-Werror=maybe-uninitialized]
  int resplen;
      ^~~~~~~

Andreas.

-- 
Andreas Schwab, schwab@linux-m68k.org
GPG Key fingerprint = 58CA 54C7 6D53 942B 1756  01D3 44D5 214B 8276 4ED5
"And now for something completely different."