[Bug 1609823] [NEW] Outdated README.Debian for cross-compilation on Ubuntu xenial

[Tero Marttila]

Public bug reported:

On Ubuntu trusty, I used to cross-compile Golang programs for ARM
devices, IIRC by installing the golang-go-linux-arm package. However,
these packages no longer exist in xenial, even though it is referred to
in the /usr/share/doc/golang-1.6-go/README.Debian file:

  If you get an error message like this:

    ~/gocode/src/helloworld $ GOARCH=386 go build
    go build runtime: linux/386 must be bootstrapped using make.bash

  …you are missing the appropriate golang-go-$GOOS-$GOARCH debian package,
  i.e. golang-go-linux-386 in this case.

Not sure how to get the missing stdlib linux_arm pkgs. Trying to cross-
compile for e.g. GOOS=arm on amd64 results in:

    $ GOPATH=~/go GOOS=linux GOARCH=arm GOARM=5 go install -v github.com/qmsk/e2/cmd/tally
    go install runtime/internal/sys: mkdir /usr/lib/go-1.6/pkg/linux_arm: permission denied

$ lsb_release -rd
Description:    Ubuntu 16.04.1 LTS
Release:        16.04

$ apt-cache policy golang-go
golang-go:
  Installed: 2:1.6-1ubuntu4
  Candidate: 2:1.6-1ubuntu4
  Version table:
 *** 2:1.6-1ubuntu4 500
        500 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages
        100 /var/lib/dpkg/status

** Affects: golang (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1609823

Title:
  Outdated README.Debian for cross-compilation on Ubuntu xenial

Status in golang package in Ubuntu:
  New

Bug description:
  On Ubuntu trusty, I used to cross-compile Golang programs for ARM
  devices, IIRC by installing the golang-go-linux-arm package. However,
  these packages no longer exist in xenial, even though it is referred
  to in the /usr/share/doc/golang-1.6-go/README.Debian file:

    If you get an error message like this:

      ~/gocode/src/helloworld $ GOARCH=386 go build
      go build runtime: linux/386 must be bootstrapped using make.bash

    …you are missing the appropriate golang-go-$GOOS-$GOARCH debian package,
    i.e. golang-go-linux-386 in this case.

  Not sure how to get the missing stdlib linux_arm pkgs. Trying to
  cross-compile for e.g. GOOS=arm on amd64 results in:

      $ GOPATH=~/go GOOS=linux GOARCH=arm GOARM=5 go install -v github.com/qmsk/e2/cmd/tally
      go install runtime/internal/sys: mkdir /usr/lib/go-1.6/pkg/linux_arm: permission denied

  $ lsb_release -rd
  Description:    Ubuntu 16.04.1 LTS
  Release:        16.04

  $ apt-cache policy golang-go
  golang-go:
    Installed: 2:1.6-1ubuntu4
    Candidate: 2:1.6-1ubuntu4
    Version table:
   *** 2:1.6-1ubuntu4 500
          500 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages
          100 /var/lib/dpkg/status

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