Use upstream compiler for linux/riscv64 and freebsd/riscv64

Close #149

Dockerfile.riscv

@@ -1,23 +0,0 @@
-# NOTE: Using 1.13 as a base to build the RISCV compiler, the resulting version is based on go1.6.
-FROM golang:1.13
-
-# Clone and complie a riscv compatible version of the go compiler.
-RUN git clone https://review.gerrithub.io/riscv/riscv-go /riscv-go
-# riscvdev branch HEAD as of 2019-06-29.
-RUN cd /riscv-go && git checkout 04885fddd096d09d4450726064d06dd107e374bf
-ENV PATH=/riscv-go/misc/riscv:/riscv-go/bin:$PATH
-RUN cd /riscv-go/src && GOROOT_BOOTSTRAP=$(go env GOROOT) ./make.bash
-ENV GOROOT=/riscv-go
-
-# Set the base env.
-ENV GOOS=linux GOARCH=riscv CGO_ENABLED=0 GOFLAGS='-v -ldflags=-s -ldflags=-w'
-
-# Pre compile the stdlib.
-RUN go build -a std
-
-# Add the code to the image.
-WORKDIR pty
-ADD . .
-
-# Build the lib.
-RUN go build

test_crosscompile.sh

@@ -25,9 +25,9 @@ cross() {
 
 set -e
 
-cross linux     amd64 386 arm arm64 ppc64 ppc64le s390x mips mipsle mips64 mips64le
+cross linux     amd64 386 arm arm64 ppc64 ppc64le s390x mips mipsle mips64 mips64le riscv64
 cross darwin    amd64 arm64
-cross freebsd   amd64 386 arm arm64
+cross freebsd   amd64 386 arm arm64 riscv64
 cross netbsd    amd64 386 arm arm64
 cross openbsd   amd64 386 arm arm64
 cross dragonfly amd64
@@ -45,10 +45,6 @@ if ! hash docker; then
   return
 fi
 
-echo2 "Build for linux."
-echo2 "  - linux/riscv"
-docker build -t creack-pty-test -f Dockerfile.riscv .
-
 # Golang dropped support for darwin 32bits since go1.15. Make sure the lib still compile with go1.14 on those archs.
 echo2 "Build for darwin (32bits)."
 echo2 "  - darwin/386"
@@ -57,7 +53,6 @@ echo2 "  - darwin/arm"
 docker build -t creack-pty-test -f Dockerfile.golang --build-arg=GOVERSION=1.14 --build-arg=GOOS=darwin --build-arg=GOARCH=arm .
 
 # Run a single test for an old go version. Would be best with go1.0, but not available on Dockerhub.
-# Using 1.6 as it is the base version for the RISCV compiler.
 # Would also be better to run all the tests, not just one, need to refactor this file to allow for specifc archs per version.
 echo2 "Build for linux - go1.6."
 echo2 "  - linux/amd64"

ztypes_freebsd_riscv64.go

@@ -0,0 +1,13 @@
+// Code generated by cmd/cgo -godefs; DO NOT EDIT.
+// cgo -godefs types_freebsd.go
+
+package pty
+
+const (
+	_C_SPECNAMELEN = 0x3f
+)
+
+type fiodgnameArg struct {
+	Len int32
+	Buf *byte
+}