cross-compile with cgo 'permission denied'

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Liam

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Oct 25, 2016, 2:09:18 PM10/25/16
to golang-nuts
I have these commands in a package script:

  GOPATH="${srcdir}" go get -d -u "${_site}/${pkgname}"
  ...
  GOPATH="${srcdir}" GOOS=linux GOARCH=arm \
  CC=arm-unknown-linux-gnueabihf-gcc CGO_ENABLED=1 \
  go install -v -ldflags='-s -w -extld=$CC' "${_site}/${pkgname}"

Results:

  runtime/cgo
  go install runtime/cgo: open /usr/lib/go/pkg/linux_arm/runtime/cgo.a: permission denied

My cgo.a files have very diff sizes:

  $ ls -l /lib/go/pkg/*/runtime/cgo*
  -rw-r--r-- 1 root root 64874 Sep  8 00:13 /lib/go/pkg/linux_amd64/runtime/cgo.a
  -rw-r--r-- 1 root root 65054 Sep  8 00:18 /lib/go/pkg/linux_amd64_race/runtime/cgo.a
  -rw-r--r-- 1 root root  2642 Oct 25 03:54 /lib/go/pkg/linux_arm/runtime/cgo.a

I have rebuilt for linux_arm:

   GOOS=linux GOARCH=arm go install -v -a std
   GOOS=linux GOARCH=arm go install -v -a cmd

On Arch Linux x86_64 with go1.7.1 linux/amd64

Dave Cheney

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Oct 25, 2016, 2:13:47 PM10/25/16
to golang-nuts
Unless you have built Go from source and/or your user owns the path Go is installed in, this is one of the few cases where go build is recommended over go install. 

Liam

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Oct 25, 2016, 5:23:28 PM10/25/16
to golang-nuts
What I wanted was the magic incantation (documented nowhere) for linux_arm installation:

   GOOS=linux GOARCH=arm CGO_ENABLED=1 CC=arm-linux-gnueabihf-gcc go install -v -a std
   GOOS=linux GOARCH=arm CGO_ENABLED=1 CC=arm-linux-gnueabihf-gcc go install -v -a cmd

where CC varies for the toolchain installed.

Would the maintainers mind if I filed an issue for this under the docs tag?

Ian Lance Taylor

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Oct 25, 2016, 6:51:17 PM10/25/16
to Liam, golang-nuts
On Tue, Oct 25, 2016 at 2:23 PM, Liam <networ...@gmail.com> wrote:
> What I wanted was the magic incantation (documented nowhere) for linux_arm
> installation:
>
> GOOS=linux GOARCH=arm CGO_ENABLED=1 CC=arm-linux-gnueabihf-gcc go install
> -v -a std
> GOOS=linux GOARCH=arm CGO_ENABLED=1 CC=arm-linux-gnueabihf-gcc go install
> -v -a cmd
>
> where CC varies for the toolchain installed.
>
> Would the maintainers mind if I filed an issue for this under the docs tag?

Even better than an issue would be a change (see
https://golang.org/doc/contribute.html). But an issue is still OK,
but please tell us where it should be documented. That is, where did
you look? Where would you expect to find this?

Ian

Pietro Gagliardi

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Oct 25, 2016, 6:59:24 PM10/25/16
to Liam, golang-nuts
What part of that magic incantation was not documented?
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Liam Breck

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Oct 26, 2016, 5:23:44 PM10/26/16
to Ian Lance Taylor, golang-nuts

On Oct 25, 2016 3:49 PM, "Ian Lance Taylor" <ia...@golang.org> wrote:
>
> On Tue, Oct 25, 2016 at 2:23 PM, Liam <networ...@gmail.com> wrote:
> > What I wanted was the magic incantation (documented nowhere) for linux_arm
> > installation:
> >
> >    GOOS=linux GOARCH=arm CGO_ENABLED=1 CC=arm-linux-gnueabihf-gcc go install
> > -v -a std
> >    GOOS=linux GOARCH=arm CGO_ENABLED=1 CC=arm-linux-gnueabihf-gcc go install
> > -v -a cmd
> >
> > where CC varies for the toolchain installed.
> >
> > Would the maintainers mind if I filed an issue for this under the docs tag?
>
> Even better than an issue would be a change (see
> https://golang.org/doc/contribute.html).  But an issue is still OK,
> but please tell us where it should be documented.

Filed issue here
https://github.com/golang/go/issues/17620

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