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Re: Fix GCC_LINUX_FUTEX to work with C99 compilers

From: Jonathan Wakely <jwakely at redhat dot com>
To: Florian Weimer <fweimer at redhat dot com>
Cc: gcc-patches at gcc dot gnu dot org, Jeff Law <law at redhat dot com>, libstdc++ at gcc dot gnu dot org
Date: Fri, 6 Sep 2019 11:09:26 +0100
Subject: Re: Fix GCC_LINUX_FUTEX to work with C99 compilers
References: <875zm5hkf1.fsf@oldenburg2.str.redhat.com>

On 06/09/19 10:57 +0200, Florian Weimer wrote:

Without this change, libstdc++ is built without futex symbols if GCC
rejects implicit function declarations in default mode.

Thanks,
Florian

config/ChangeLog:

2019-09-06  Florian Weimer  <fweimer@redhat.com>

	* futex.m4 (GCC_LINUX_FUTEX): Include <unistd.h> for the syscall
	function.

libgomp/ChangeLog, libitm/ChangeLog, libstdc++-v3/ChangeLog:

2019-09-06  Florian Weimer  <fweimer@redhat.com>

	* configure: Regenerate.


I can't approve the top-level part but it's OK from the libstdc++ side
(for release branches too if desired).

References:
- Fix GCC_LINUX_FUTEX to work with C99 compilers
  - From: Florian Weimer

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