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bug#22522: Commit b88e9cded7ae3756e3a2ec4a23e8df352a0239f9 breaks emacs

From: Paul Eggert
Subject: bug#22522: Commit b88e9cded7ae3756e3a2ec4a23e8df352a0239f9 breaks emacs dumping for me
Date: Tue, 2 Feb 2016 14:54:00 -0800
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.5.0

On 02/02/2016 02:08 PM, Ken Brown wrote:
Paul, I can ask on the Cygwin list whether this should be changed to be more in line with other platforms.

Yes it should. Defining _GNU_SOURCE should make aligned_alloc visible regardless of whether -std=c99 is specified. This is because defining _GNU_SOURCE means, "Make GNU symbols visible even when compiling pedantically." This is OK, since the C standard says the behavior is undefined whenever the user defines a reserved symbol like _GNU_SOURCE.

In the meantime, what's the best way to deal with this?

I installed the attached patch into the Emacs master, to try to work around this problem by putting GCC into C11 mode. Please give it a try.

Attachment: 0001-Build-with-C11-if-available.patch
Description: Source code patch

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