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x/vgo: undefined struct on build #24557

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utrescu opened this issue Mar 27, 2018 · 1 comment

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@utrescu
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commented Mar 27, 2018

Please answer these questions before submitting your issue. Thanks!

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

$ go version
go version go1.10 linux/amd64

$ vgo version
go version go1.10 linux/amd64 vgo:2018-02-20.1

Does this issue reproduce with the latest release?

Yes

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

GOARCH="amd64"
GOBIN=""
GOCACHE="/home/xavier/.cache/go-build"
GOEXE=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOOS="linux"
GOPATH="/home/xavier/.go/"
GORACE=""
GOROOT="/home/xavier/software/go"
GOTMPDIR=""
GOTOOLDIR="/home/xavier/software/go/pkg/tool/linux_amd64"
GCCGO="gccgo"
CC="gcc"
CXX="g++"
CGO_ENABLED="1"
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-build173078398=/tmp/go-build -gno-record-gcc-switches"

What did you do?

I need the CC env to use gcc:

$ CC=gcc vgo build

Code:

It's a test from dgrijalva/jwt-go package

https://play.golang.org/p/gr8qhww8Z0S

What did you expect to see?

With standard go it builds

$ go build
$ ./jwt-test 
2018/03/27 15:34:40 eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJuYW1lIjoib3RpYWkxMCIsImFnZSI6MzB9.6juKC9wI5OJd_Gb_HYDqv99VK2d2Rbw2H3V28M_0ays
2018/03/27 15:34:40 map[name:otiai10 age:30] <nil>
2018/03/27 15:34:40 true {otiai10 30 { 0  0  0 }} <nil>

What did you see instead?

$ vgo build
vgo: resolving import "github.com/dgrijalva/jwt-go"
vgo: finding github.com/dgrijalva/jwt-go (latest)
vgo: adding github.com/dgrijalva/jwt-go v1.0.2
# github.com/utrescu/gwt-test
./main.go:12:2: undefined: jwt.StandardClaims

@gopherbot gopherbot added this to the vgo milestone Mar 27, 2018

@rsc

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commented Mar 27, 2018

Sorry for the confusion, but jwt-go does not use semantic import versioning, so by default "latest" has to ignore all the v2+ tagged things, and jwt-go is up to v3.0.x. Presumably StandardClaims is in one of those later versions. You can force the use of the latest commit as if it were still in the v0 world (without semantic import versioning), by using

go get github.com/dgrijalva/jwt-go@06ea1031745

(that's the latest commit, I just looked it up). That should get you going.

@rsc rsc closed this Mar 27, 2018

@golang golang locked and limited conversation to collaborators Mar 27, 2019

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