x/sys/unix: Access() syscall is missing on AIX/ppc

[aklyachkin]

What version of Go are you using (go version)?

$ go version
go version go1.14.7 aix/ppc64

Does this issue reproduce with the latest release?

This is the latest release available from IBM

What operating system and processor architecture are you using (go env)?

go env Output

$ go env
GO111MODULE=""
GOARCH="ppc64"
GOBIN=""
GOCACHE="/root/.cache/go-build"
GOENV="/root/.config/go/env"
GOEXE=""
GOFLAGS=""
GOHOSTARCH="ppc64"
GOHOSTOS="aix"
GOINSECURE=""
GONOPROXY=""
GONOSUMDB=""
GOOS="aix"
GOPATH="/root/go"
GOPRIVATE=""
GOPROXY="https://proxy.golang.org,direct"
GOROOT="/opt/freeware/lib/golang"
GOSUMDB="sum.golang.org"
GOTMPDIR=""
GOTOOLDIR="/opt/freeware/lib/golang/pkg/tool/aix_ppc64"
GCCGO="gccgo"
GOPPC64="power8"
AR="ar"
CC="gcc"
CXX="g++"
CGO_ENABLED="1"
GOMOD=""
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -maix64 -pthread -mcmodel=large -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build467576586=/tmp/go-build -gno-record-gcc-switches"

What did you do?

compiling a package:
./segment-readonly.go:12:5: undefined: unix.Access

What did you expect to see?

the package is compiled.

What did you see instead?

./segment-readonly.go:12:5: undefined: unix.Access

The problem is missing Access() in golang.org/x/sys/unix on AIX platform. AIX has access() syscall and is fully compatible with the Linux counterpart:

Syntax

       #include  
       int access (PathName,Mode)
       char *PathName;
       int Mode;

AFAIU it is just an addition of a line something like:

//sys        Access(path string, mode uint32) (err error)

into syscall_aix.go

[ianlancetaylor]

CC @Helflym @laboger

[gopherbot]

Change https://golang.org/cl/262897 mentions this issue: unix: add missing syscalls on AIX