affected/package: syscall on darwin amd64 — macOS 13.0 darwin xnu

[haraldrudell]

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

$ go version
go version go1.19.3 darwin/arm64
# cross-compiling to GOOS=darwin GOARCH=amd64

Does this issue reproduce with the latest release?

yes

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

Cross Compiling machine:

go env Output

$ go env
GO111MODULE=""                                                                                                             
GOARCH="arm64"                                                                                                             
GOBIN=""                                                                                                                   
GOCACHE="/Users/foxyboy/Library/Caches/go-build"                                                                           
GOENV="/Users/foxyboy/Library/Application Support/go/env"                                                                  
GOEXE=""                                                                                                                   
GOEXPERIMENT=""                                                                                                            
GOFLAGS=""
GOHOSTARCH="arm64"
GOHOSTOS="darwin"
GOINSECURE=""
GOMODCACHE="/Users/foxyboy/go/pkg/mod"
GONOPROXY=""
GONOSUMDB=""
GOOS="darwin"
GOPATH="/Users/foxyboy/go"
GOPRIVATE=""
GOPROXY="https://proxy.golang.org,direct"
GOROOT="/opt/homebrew/Cellar/go/1.19.3/libexec"
GOSUMDB="sum.golang.org"
GOTMPDIR=""
GOTOOLDIR="/opt/homebrew/Cellar/go/1.19.3/libexec/pkg/tool/darwin_arm64"
GOVCS=""
GOVERSION="go1.19.3"
GCCGO="gccgo"
AR="ar"
CC="clang"
CXX="clang++"
CGO_ENABLED="1"
GOMOD="/opt/sw/privates/netter/go.mod"
GOWORK=""
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -arch arm64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/sq/0x1_9fyn1bv907s7ypfryt1c0000gn/T/go-build2291873123=/tmp/go-build -gno-record-gcc-switches -fno-common"

Executing machine is MacBook Pro 2015 13” with Intel processor. No go installed

What did you do?

I wrote 3,000 lines of closed-source code wrapping the iffy golang.org/x/net/route.ParseRIB function to consume the mostly undocumented netlink socket output on macOS 13.0+ darwin xnu.

when cross-compiling GOOS=darwin GOARCH=amd64, the following syscall symbols are not defined:

• AF_UTUN
• RTF_PROXY
• RTF_ROUTER

I came up with some silly constructs for this to work transparently

However, when the Wi-Fi interface is turned off on amd64, macOS emits data including RTF_ROUTER

What did you expect to see?

My code to work like on macOS arm64, ie. amd64 to have the symbols present

What did you see instead?

My checkit and checkit again code found undefined bits in rtm_flags: RTF_ROUTER

I think darwin amd64 should include the 3 symbols

RTF_UP: https://github.com/apple/darwin-xnu/blob/main/bsd/net/route.h#L284

rt_msghdr: https://github.com/apple/darwin-xnu/blob/main/bsd/net/route.h#L345

[seankhliao]

Can you include a minimal reproducer?
And/or point out which places are missing the definitions?

[seankhliao]

Note the symbols are available in golang.org/x/sys/unix (not syscall, which is deprecated for this purpose.

[haraldrudell]

Thank you, it works when using unix.AF_UTUN instead of syscall.AF_UTUN and so forth

[seankhliao]

Closing as not a bug.