libguestfs fails to build the Go bindings on arm64 and ppc64el

yes, not compatible with go 1.4 (cgo directives inside normal comments).

* Matthias Klose:

> yes, not compatible with go 1.4 (cgo directives inside normal comments).

Curious. I didn't notice any error message in the Ubuntu build logs that
points to such a problem.

Cheers,
-Hilko

Does golang actually exist for aarch64? I'm trying to compile it but it just complains about:

go tool dist: unknown architecture: aarch64

On Fedora we have gccgo:

go version go1.4 gccgo (GCC) 5.0.0 20150226 (Red Hat 5.0.0-0.18) linux/arm64

But it seems we need some other package called 'golang' which doesn't exist and doesn't compile as above.

OK ignore the previous comment, apparently gcc-go should be enough. But as you say it cannot compile the golang bindings on aarch64. Is there some guidance about how cgo bindings need to be changed for 1.4?

On 03/14/2015 01:44 PM, Richard Jones wrote:
> Does golang actually exist for aarch64? I'm trying to compile it but it
> just complains about:
>
> go tool dist: unknown architecture: aarch64
>
> On Fedora we have gccgo:
>
> go version go1.4 gccgo (GCC) 5.0.0 20150226 (Red Hat 5.0.0-0.18)
> linux/arm64

too old, you need trunk 20150313
https://gcc.gnu.org/ml/gcc-patches/2015-03/msg00697.html

On 03/14/2015 02:14 PM, Richard Jones wrote:
> OK ignore the previous comment, apparently gcc-go should be enough. But
> as you say it cannot compile the golang bindings on aarch64. Is there
> some guidance about how cgo bindings need to be changed for 1.4?

no, all I found was the documentation for the cgo command, and then experimented.

apparently the directives are not recognized when placed in /* ... */ style
comments, you have to use the // style.

Thanks.

I'm now using:

    go version go1.4.2 gccgo (GCC) 5.0.0 20150313 (Red Hat 5.0.0-0.19) linux/arm64

and it compiles and the test suite works fine. I don't see the bug that you're seeing on Ubuntu.

Anyway - I will enable golang support in Fedora Rawhide on all architectures and see how it goes. This will also help to catch regressions in future.