tree 17696841e30340c4e352762ebed0c85c608db40a
parent ebe1bf3edb3325c393447059974de898d5133eb8
author Tobias Klauser <tklauser@distanz.ch> 1536237362 +0200
committer Tobias Klauser <tobias.klauser@gmail.com> 1536240657 +0000

unix: add support for linux/riscv64

Add syscall wrappers, error constants and types for linux/riscv64

Switch docker image to Ubuntu 18.10 in order to get qemu supporting
riscv64. Also set the uname release string for qemu to 4.15 (the first
Linux kernel version with riscv64 support), because otherwise running
the generating C program in mkerrors.sh on a host with an older kernel
would fail with a "FATAL: kernel too old".

Note that linux/riscv64 is currently only usable using gccgo.

Updates golang/go#27532

Change-Id: Ic420f842342418443474cac72d38adff14d1b938
Reviewed-on: https://go-review.googlesource.com/133735
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>