tree 31f32113c54fbb2d9aeaabfc3c87f2cadd233db3
parent 30e92a19ae4a77dde818b8c3d41d51e4850cba12
author Tobias Klauser <tklauser@distanz.ch> 1551768927 +0100
committer Tobias Klauser <tobias.klauser@gmail.com> 1551856516 +0000

unix: on ARM GNU/Linux let Pipe fall back to pipe

Follow CL 165217 which did this for package syscall.

Android O seems to require Pipe to call the pipe2 system call.
But kernel version 2.6.23 only supports pipe, not pipe2.
So try pipe2 first, then fall back to pipe.

Updates golang/go#30549

Change-Id: Icf21433fa046ff137c0265fa96410229def482f7
Reviewed-on: https://go-review.googlesource.com/c/sys/+/165297
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>