[patch] libstdc++/65142 Check read() result in std::random_device.

[Jonathan Wakely]

On 17/09/15 22:21 +0200, Gerald Pfeifer wrote:
>On Thu, 17 Sep 2015, Jonathan Wakely wrote:
>>> Any comments on this version?
>> Committed to trunk.
>
>Unfortunately this broke bootstrap on FreeBSD 10.1.
>
>/scratch/tmp/gerald/gcc-HEAD/libstdc++-v3/src/c++11/random.cc: In member function 'std::random_device::result_type std::random_device::_M_getval()':
>/scratch/tmp/gerald/gcc-HEAD/libstdc++-v3/src/c++11/random.cc:144:22: error: 'errno' was not declared in this scope
>  else if (e != -1 || errno != EINTR)
>                      ^
>/scratch/tmp/gerald/gcc-HEAD/libstdc++-v3/src/c++11/random.cc:144:31: error: 'EINTR' was not declared in this scope
>  else if (e != -1 || errno != EINTR)
>                               ^
>Makefile:545: recipe for target 'random.lo' failed
>
>I probably won't be able to dig in deeper today, but figured this
>might already send you on the right path?
>
>Actually...
>
>...how about he patch below?  Bootstraps on i386-unknown-freebsd10.1,
>no regressions.

Sorry about that, I've committed your patch.

>Gerald
>
>
>2015-09-17  Gerald Pfeifer  <gerald@pfeifer.com>
>
>	* src/c++11/random.cc: Include <cerrno>.
>
>Index: libstdc++-v3/src/c++11/random.cc
>===================================================================
>--- libstdc++-v3/src/c++11/random.cc	(revision 227883)
>+++ libstdc++-v3/src/c++11/random.cc	(working copy)
>@@ -31,6 +31,7 @@
> # include <cpuid.h>
> #endif
>
>+#include <cerrno>
> #include <cstdio>
>
> #ifdef _GLIBCXX_HAVE_UNISTD_H