x/sys/unix: AT_REMOVEDIR not defined on OpenBSD #46342
Description
What version of Go are you using (go version)?
$ go version go version go1.16.2 openbsd/amd64
Does this issue reproduce with the latest release?
Yes, also tested with 1.16.4 (cross-compiling to OpenBSD).
What operating system and processor architecture are you using (go env)?
go env Output
$ go env GO111MODULE="" GOARCH="amd64" GOBIN="" GOCACHE="/root/.cache/go-build" GOENV="/root/.config/go/env" GOEXE="" GOFLAGS="" GOHOSTARCH="amd64" GOHOSTOS="openbsd" GOINSECURE="" GOMODCACHE="/root/go/pkg/mod" GONOPROXY="" GONOSUMDB="" GOOS="openbsd" GOPATH="/root/go" GOPRIVATE="" GOPROXY="https://proxy.golang.org,direct" GOROOT="/usr/local/go" GOSUMDB="sum.golang.org" GOTMPDIR="" GOTOOLDIR="/usr/local/go/pkg/tool/openbsd_amd64" GOVCS="" GOVERSION="go1.16.2" GCCGO="gccgo" AR="ar" CC="cc" CXX="c++" CGO_ENABLED="1" GOMOD="/root/a/go.mod" CGO_CFLAGS="-g -O2" CGO_CPPFLAGS="" CGO_CXXFLAGS="-g -O2" CGO_FFLAGS="-g -O2" CGO_LDFLAGS="-g -O2" PKG_CONFIG="pkg-config" GOGCCFLAGS="-fPIC -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build3757805810=/tmp/go-build -gno-record-gcc-switches"
What did you do?
Program:
package main
import (
"log"
"golang.org/x/sys/unix"
)
func main() {
log.Printf("%v", unix.AT_REMOVEDIR)
}
go.sum:
module a
go 1.16
require golang.org/x/sys v0.0.0-20210521203332-0cec03c779c1
What did you expect to see?
The value of AT_REMOVEDIR.
What did you see instead?
# a
./x.go:9:19: undefined: unix.AT_REMOVEDIR
I noticed this when cross-compiling for OpenBSD but the above tests were run directly on OpenBSD.
The constant is present on the system:
$ grep -r AT_REMOVEDIR /usr/include
/usr/include/fcntl.h:#define AT_REMOVEDIR 0x08
/usr/include/sys/fcntl.h:#define AT_REMOVEDIR 0x08
It's defined on other systems (e.g. FreeBSD, Linux, etc.).