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cmd/go: go install -buildmode=plugin creates shared object with wrong file name #33571

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zephyrtronium opened this issue Aug 9, 2019 · 3 comments
Closed

cmd/go: go install -buildmode=plugin creates shared object with wrong file name #33571

zephyrtronium opened this issue Aug 9, 2019 · 3 comments
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GoCommand cmd/go help wanted NeedsInvestigation Someone must examine and confirm this is a valid issue and not a duplicate of an existing one.
Milestone
Unplanned

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

$ go version
go version go1.12.7 linux/amd64

Does this issue reproduce with the latest release?

yes

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

go env Output
$ go env
GOARCH="amd64"
GOBIN=""
GOCACHE="/home/zephyrtronium/.cache/go-build"
GOEXE=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOOS="linux"
GOPATH="/home/zephyrtronium/go"
GOPROXY=""
GORACE=""
GOROOT="/usr/local/go"
GOTMPDIR=""
GOTOOLDIR="/usr/local/go/pkg/tool/linux_amd64"
GCCGO="gccgo"
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 -m64 -pthread -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build282654314=/tmp/go-build -gno-record-gcc-switches"

What did you do?

~/mygo/plugintest$ printf 'package main\n\nvar String = "Hello, world!"\n' >plugin.go
~/mygo/plugintest$ go install -buildmode=plugin -x

What did you expect to see?

A shared object named plugintest.so in /home/zephyrtronium/go/pkg/linux_amd64_dynlink/github.com/zephyrtronium/.

What did you see instead?

A shared object named plugintest.a in the same directory.

I confirmed that the plugin loads correctly using the plugin package, it's just named .a instead of .so. The output from go install -buildmode=plugin -x includes mv $WORK/b001/exe/a.out.so /home/zephyrtronium/go/pkg/linux_amd64_dynlink/github.com/zephyrtronium/plugintest.a, versus go build -buildmode=plugin -n having mv $WORK/b001/exe/a.out.so plugintest.so.
@bcmills bcmills added the NeedsInvestigation Someone must examine and confirm this is a valid issue and not a duplicate of an existing one. label Aug 12, 2019
@bcmills bcmills added this to the Unplanned milestone Aug 12, 2019
@bcmills
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bcmills commented Aug 12, 2019

CC @jayconrod @ianlancetaylor @crawshaw

@bcmills bcmills added the GoCommand cmd/go label Sep 7, 2023
@quantonganh
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I guess this has been fixed:

$ go install -buildmode=plugin -x
...

mv $WORK/b001/exe/a.out.so plugintest.so
rm -rf $WORK/b001/

@bcmills
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bcmills commented Nov 3, 2023

Huh. I'm not sure what would have fixed it, but given the lack of comments since 2019 I suspect you're correct. 🙃

(Maybe it could have been https://go.dev/cl/197544?)

At any rate: closing as “no longer reproducible”. @quantonganh, thanks for checking this!

@bcmills bcmills closed this as not planned Won't fix, can't repro, duplicate, stale Nov 3, 2023
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GoCommand cmd/go help wanted NeedsInvestigation Someone must examine and confirm this is a valid issue and not a duplicate of an existing one.
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@zephyrtronium @quantonganh @bcmills