x/sys/cpu: go install -buildmode=shared std failed #49942
Description
What version of Go are you using (go version)?
$ go version go version devel go1.18-098599003b Fri Dec 3 01:09:21 2021 +0000 linux/amd64
Does this issue reproduce with the latest release?
No, it reproduce with tip.
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="" GOEXPERIMENT="" GOFLAGS="" GOHOSTARCH="amd64" GOHOSTOS="linux" GOINSECURE="" GOMODCACHE="/mnt/d/01.golang/01.GOPATH/pkg/mod" GONOPROXY="" GONOSUMDB="" GOOS="linux" GOPATH="/mnt/d/01.golang/01.GOPATH/" GOPRIVATE="" GOPROXY="https://goproxy.cn,direct" GOROOT="/mnt/d/01.golang/03.godev/go" GOSUMDB="off" GOTMPDIR="" GOTOOLDIR="/mnt/d/01.golang/03.godev/go/pkg/tool/linux_amd64" GOVCS="" GOVERSION="devel go1.18-098599003b Fri Dec 3 01:09:21 2021 +0000" GCCGO="gccgo" GOAMD64="v1" AR="ar" CC="gcc" CXX="g++" CGO_ENABLED="1" GOMOD="/mnt/d/01.golang/03.godev/go/src/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 -m64 -pthread -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build2041059842=/tmp/go-build -gno-record-gcc-switches"
What did you do?
run the command go install -buildmode=shared std
What did you expect to see?
Install the libstd.so in $goroot/pkg/....
What did you see instead?
Failed.
$ go install -buildmode=shared std # /tmp/go-build268340113/b232/libstd.so vendor/golang.org/x/sys/cpu.darwinSupportsAVX512·f: missing section for relocation target vendor/golang.org/x/sys/cpu.darwinSupportsAVX512
In the CL https://go-review.googlesource.com/c/sys/+/361255, the implement of darwinSupportsAVX512 is removed in cpu_x86.s, but it didn't be removed in cpu_gc_x86.go.
https://github.com/golang/sys/blob/fe61309f888157de161a48facf03d9412635cffe/cpu/cpu_gc_x86.go#L21
It should be removed in cpu_gc_x86.go and sync it to golang/go.