From: Jonathan Wakely <jwakely@redhat.com>
To: Xi Ruoyao <ryxi@stu.xidian.edu.cn>
Cc: gcc-patches@gcc.gnu.org, libstdc++@gcc.gnu.org
Subject: Re: [PATCH] Implement non-trivial std::random_device::entropy (PR libstdc++/67578)
Date: Tue, 23 May 2017 12:11:00 -0000 [thread overview]
Message-ID: <20170523115255.GC12306@redhat.com> (raw)
In-Reply-To: <1495462248.29130.13.camel@stu.xidian.edu.cn>
On 22/05/17 22:10 +0800, Xi Ruoyao wrote:
>In very old Linux kernel (1.3.x) there is random.h but not RNDGETENTCNT.
>The random.h without RNDGETENTCNT was only used in the kernel internally.
>But at that time Linux Makefile didn't have "headers_install" target
>so user may copy all headers (including the internal ones) to /usr/include.
>It seems we should check RNDGETENTCNT explicitly if we want to support
>1.3.x.
OK, I think that's ancient enough that we don't need to care about it,
but on the other hand it's not impossible to believe that somebody
could be using a custom Linux kernel that removed it. So let's keep
the test for it.
next prev parent reply other threads:[~2017-05-23 11:52 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-05-18 12:15 Xi Ruoyao
2017-05-22 13:21 ` Jonathan Wakely
2017-05-22 13:50 ` Xi Ruoyao
2017-05-22 14:10 ` Jonathan Wakely
2017-05-22 14:19 ` Xi Ruoyao
2017-05-23 12:11 ` Jonathan Wakely [this message]
2017-05-22 14:30 ` [PATCH v2] " Xi Ruoyao
2017-05-23 16:22 ` Jonathan Wakely
2017-05-24 19:28 ` Jonathan Wakely
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