Test failure on Ubuntu 15.10 (ppc64le) while building goes supplementary network libraries

[MaheshWaidande]

Hi All,

I am working porting go supplementary networking library ( https://godoc.org/golang.org/x/net ) on ppc64le architecture. I am using Ubuntu 15.10 on top of ppc64le hardware. I have successfully built go supplementary network repository on ppc64le but while running automated test case suite I observe that one test case is failing with ‘found empty parent’ error.

Below is the description of test case, which is failing on Ubuntu 15.10,

ok go/ast 0.003s
--- FAIL: TestImportVendorParentFailure (0.00s)
build_test.go:339: found empty parent in /go/src/vendor/golang.org/x/net/http2
FAIL
FAIL go/build 1.350s

I performed below steps for compiling / building go supplementary network library on Ubuntu 15.10 (ppc64le)

Step 1: Update repositories and install required packages to build go repository
$ apt-get update && apt-get install -y git python gcc g++ make build-essential bison gccgo-5

Step 2 : Fetch go source from git repository
git clone https://github.com/golang/go.git && cd go

Step 3 : Check out last stable release of go and build and test it before proceeding further
git checkout origin/release-branch.go1.6
cd src/

Step 4 : updates the links in /etc/alternatives directory
update-alternatives --set go /usr/bin/go-5
export GOROOT_BOOTSTRAP=/usr

Step 5: build and test go code
./all.bash

Step 6: prepare directory structure to fetch go supplementary network libraries and its dependency code
cd vendor/
mkdir -p golang.org/x
cd golang.org/x/

Step 7: Clone go supplementary network libraries and it's dependency code
git clone https://github.com/golang/text.git
git clone https://github.com/golang/crypto.git
git clone https://github.com/golang/net.git

Step 8: Step into ‘net’ directory and fetch last stable release of go supplementary network library
cd net/
git checkout origin/release-branch.go1.6

Step 9: Go to 'go/src' directory and run 'all.bash' script to build and test go packages
cd ../../../../
./all.bash

I followed same steps on Ubuntu 15.10 + amd64 combination and get exactly same result. TestImportVendorParentFailure test case fails with ‘found empty parent in /go/src/vendor/golang.org/x/net/http2’ error.

Any pointers/suggestions on failed test case will be great help.

Below is additional information required for debug / resolve /reproduce test case failure,

1. What version of Go are you using (go version)?
   $ go version
   go version go1.4.2 gccgo (Ubuntu 5.2.1-22ubuntu2) 5.2.1 20151010 linux/ppc64le
2. What operating system and processor architecture are you using (go env)?

$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 15.10
Release: 15.10
Codename: wily

$ go env
GOARCH="ppc64le"
GOBIN=""
GOCHAR="9"
GOEXE=""
GOHOSTARCH="ppc64le"
GOHOSTOS="linux"
GOOS="linux"
GOPATH=""
GORACE=""
GOROOT="/usr"
GOTOOLDIR="/usr/lib/gcc/powerpc64le-linux-gnu/5"
CC="/usr/bin/gcc-5"
GOGCCFLAGS="-fPIC -pthread -fmessage-length=0"
CXX="/usr/bin/g++-5"
CGO_ENABLED="1"

$ uname -a
Linux 9de5feaaf936 3.16.0-30-generic #40-Ubuntu SMP Mon Jan 12 22:07:11 UTC 2015 ppc64le ppc64le ppc64le GNU/Linux

1. What did you do?
   I am working porting go supplementary networking libraries https://godoc.org/golang.org/x/net on ppc64le architecture. Already provided steps to reproduce test case failure
2. What did you expect to see?
   No test case failure on Ubuntu 15.10 + ppc64le combination
3. What did you see instead?
   Automated test case execution failed due to failure of ‘TestImportVendorParentFailure’ test case

[bradfitz]

I think this is your problem:

Step 6: prepare directory structure to fetch go supplementary network libraries and its dependency code
cd vendor/
mkdir -p golang.org/x
cd golang.org/x/

That's not how you hack on the golang.org/x/... repos. You don't put them in your $GOROOT. Instead, you put them in your $GOPATH.

See https://golang.org/doc/code.html

Feel free to reopen this bug if I'm missing something.