cmd/go: trimpath gcflag not trimming anything

[xibz]

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

v1.12.0

$ go version

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/xibz/.cache/go-build"
GOEXE=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOOS="linux"
GOPATH="/home/xibz/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="/home/xibz/firectl/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-build920574943=/tmp/go-build -gno-record-gcc-switches"

What did you do?

$ go build -a -o foo -gcflags=-trimpath=/home/xibz -asmflags=-trimpath=/home/xibz
$ strings foo | grep xibz
/home/xibz/go/pkg/mod/github.com/globalsign/[email protected]/internal/json/fold.go
/home/xibz/go/pkg/mod/github.com/globalsign/[email protected]/internal/json/extension.go
/home/xibz/go/pkg/mod/github.com/globalsign/[email protected]/internal/json/encode.go
/home/xibz/go/pkg/mod/github.com/globalsign/[email protected]/internal/json/scanner.go
/home/xibz/go/pkg/mod/github.com/globalsign/[email protected]/internal/json/decode.go

What did you expect to see?

$ strings foo | grep xibz

What did you see instead?

$ strings foo | grep xibz
/home/xibz/go/pkg/mod/github.com/globalsign/[email protected]/internal/json/fold.go
/home/xibz/go/pkg/mod/github.com/globalsign/[email protected]/internal/json/extension.go
/home/xibz/go/pkg/mod/github.com/globalsign/[email protected]/internal/json/encode.go
/home/xibz/go/pkg/mod/github.com/globalsign/[email protected]/internal/json/scanner.go
/home/xibz/go/pkg/mod/github.com/globalsign/[email protected]/internal/json/decode.go

[andybons]

@ianlancetaylor

[ianlancetaylor]

Is there a way that we can recreate what you are seeing?

When I try simple test cases it works as expected for me.

Thanks.

[xibz]

@ianlancetaylor - What simple cases are you checking against? I can reproduce this with this code. This occurs when there are dependencies. Otherwise it behaves correctly, unless Im not understanding the flag correctly.

package main

import (
	"fmt"

	"github.com/aws/aws-sdk-go/aws"
)

func main() {
	fmt.Println(aws.String("Hello world!"))
}

I then build it like so
go build -a -o main -gcflags=-trimpath=/home/xibz -asmflags=-trimpath=/home/xibz main.go

/home/xibz/go/src/github.com/aws/aws-sdk-go/aws/errors.go
/home/xibz/go/src/github.com/aws/aws-sdk-go/aws/endpoints/endpoints.go
/home/xibz/go/src/github.com/aws/aws-sdk-go/aws/endpoints/defaults.go
/home/xibz/go/src/github.com/aws/aws-sdk-go/aws/credentials/shared_credentials_provider.go
/home/xibz/go/src/github.com/aws/aws-sdk-go/aws/credentials/env_provider.go
/home/xibz/go/src/github.com/aws/aws-sdk-go/aws/credentials/chain_provider.go
/home/xibz/go/src/github.com/aws/aws-sdk-go/aws/credentials/static_provider.go
/home/xibz/go/src/github.com/aws/aws-sdk-go/aws/credentials/credentials.go
/home/xibz/go/src/github.com/aws/aws-sdk-go/internal/ini/ini_parser.go
/home/xibz/go/src/github.com/aws/aws-sdk-go/internal/ini/empty_token.go
/home/xibz/go/src/github.com/aws/aws-sdk-go/internal/ini/literal_tokens.go
/home/xibz/go/src/github.com/aws/aws-sdk-go/internal/ini/ini_lexer.go
/home/xibz/go/src/github.com/aws/aws-sdk-go/internal/ini/ast.go
/home/xibz/go/src/github.com/aws/aws-sdk-go/aws/awserr/types.go
/home/xibz/go/src/github.com/aws/aws-sdk-go/aws/awserr/error.go

[AlexRouSg]

Try go build -a -o main -gcflags=all=-trimpath=/home/xibz -asmflags=all=-trimpath=/home/xibz main.go

[xibz]

@AlexRouSg - That did it! Thanks :). Closing