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cmd/go: cannot use packages ... from different roots #33037

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ianlancetaylor opened this issue Jul 10, 2019 · 5 comments
Open

cmd/go: cannot use packages ... from different roots #33037

ianlancetaylor opened this issue Jul 10, 2019 · 5 comments
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@ianlancetaylor
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@ianlancetaylor ianlancetaylor commented Jul 10, 2019

With current tip (CL 185517, 9d56dd8):

> go get -d github.com/yunabe/gobug30768
> go build -linkshared github.com/yunabe/gobug30768
installing shared library: cannot use packages archive/tar and internal/x/crypto/chacha20poly1305 from different roots /home/iant/go/pkg/linux_amd64_dynlink and 

I don't know what causes this error, but my immediate gripe is that it says "different roots" but one of the roots appears to be the empty string.

CC @bcmills @jayconrod

@ianlancetaylor ianlancetaylor added this to the Go1.13 milestone Jul 10, 2019
@bcmills
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@bcmills bcmills commented Jul 10, 2019

Is this in module mode, or GOPATH mode? (Could you attach go env?)

@bcmills
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@bcmills bcmills commented Jul 10, 2019

The extra-weird thing is that the package internal/x/crypto/chacha20poly1305 doesn't exist any more. (It's now in vendor/golang.org/x/crypto.)

@ianlancetaylor
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@ianlancetaylor ianlancetaylor commented Jul 10, 2019

go env output:

GO111MODULE=""
GOARCH="amd64"
GOBIN=""
GOCACHE="/home/iant/.cache/go-build"
GOENV="/home/iant/.config/go/env"
GOEXE=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GONOPROXY=""
GONOSUMDB=""
GOOS="linux"
GOPATH="/home/iant/gopath"
GOPRIVATE=""
GOPROXY="https://proxy.golang.org"
GOROOT="/home/iant/go"
GOSUMDB="sum.golang.org"
GOTMPDIR=""
GOTOOLDIR="/home/iant/go/pkg/tool/linux_amd64"
GCCGO="gccgo"
AR="ar"
CC="gcc"
CXX="g++"
CGO_ENABLED="1"
GOMOD="/home/iant/go/src/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 -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build624273732=/tmp/go-build -gno-record-gcc-switches"
@ianlancetaylor
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@ianlancetaylor ianlancetaylor commented Jul 10, 2019

Thanks for pointing that out. This must have something to do with existing files in $GOROOT/pkg/linux_amd64_dynlink. If I move that directory aside, I get

> go build -linkshared github.com/yunabe/gobug30768
# github.com/yunabe/gobug30768
/home/iant/go/pkg/tool/linux_amd64/link: cannot implicitly include runtime/cgo in a shared library
@ianlancetaylor ianlancetaylor modified the milestones: Go1.13, Go1.14 Jul 10, 2019
@924838

This comment was marked as off-topic.

@rsc rsc modified the milestones: Go1.14, Backlog Oct 9, 2019
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