[OE-core] [PATCH] go/go-runtime: use update-alternative for zdefaultcc.go

[Matt Madison]

On Wed, Aug 7, 2019 at 10:36 PM Changqing Li <changqing.li at windriver.com> wrote:
>
>
> On 8/7/19 10:16 PM, Richard Purdie wrote:
> > On Wed, 2019-08-07 at 10:35 +0800, Changqing Li wrote:
> >> On 8/6/19 6:47 PM, Richard Purdie wrote:
> >>> On Tue, 2019-08-06 at 14:54 +0800, changqing.li at windriver.com
> >>> wrote:
> >>>> From: Changqing Li <changqing.li at windriver.com>
> >>>>
> >>>> fix below error:
> >>>> file /usr/lib64/go/src/cmd/cgo/zdefaultcc.go conflicts between
> >>>> attempted installs of go-dev-1.12.6-r0.core2_64 and go-runtime-
> >>>> dev-
> >>>> 1.12.6-r0.core2_64
> >>>> file /usr/lib64/go/src/cmd/go/internal/cfg/zdefaultcc.go
> >>>> conflicts
> >>>> between attempted installs of go-dev-1.12.6-r0.core2_64 and go-
> >>>> runtime-dev-1.12.6-r0.core2_64
> >>>>
> >>>> Signed-off-by: Changqing Li <changqing.li at windriver.com>
> >>>> ---
> >>>>    meta/recipes-devtools/go/go-runtime_1.12.bb | 6 ++++++
> >>>>    meta/recipes-devtools/go/go_1.12.bb         | 7 +++++++
> >>>>    2 files changed, 13 insertions(+)
> >>> It seems odd that both of these packages should provide this,
> >>> perhaps
> >>> one version should just be deleted?
> >>>
> >>> Cheers,
> >>>
> >>> Richard
> >> These 2 recipes don't have any DEPEND or RDEPEND relationship, so
> >> they
> >> are independent from the point of recipe.
> >>
> >> Make one of dev packages empty seems not proper ?
> > Let me put this another way. What is the difference between these two
> > binaries? When should you use one, when should you use the other? Or
> > are they the same thing?
> >
> > Cheers,
> >
> > Richard
>
> go is for building go compiler,  and go-runtime only contains go
> standard  runtime library
>
> There are 2 use caes:
>
> 1.  on target, user only install go-runtime to provide libstd.so for
> other go apps.
>
> 2.  on target, user install both go and go-runtime
>
> in my opinion,  only in case2,  install dev pkg is meaningful, so maybe
> we can remove the conflict
>
> part of files from go-runtime.
>
>
> @Matt,  you have do lots of work related these recipes, could you also
> give your opinion? Thanks.

Well, those 'z'-prefixed files are ones that are generated during the
build of go to embed default flags for the 'go' and 'cgo' commands to
use when they have to call on the C compiler.  They also happen to be
generated during the build of go-runtime because go normally doesn't
separate its toolchain and runtime builds, whereas we have to for the
cross build case. So filtering those files out of the go-runtime-dev
package and leaving them in the go-dev package would probably be OK.
It's something of an artificial distinction, though.

Regards,
-Matt

>
> >
> >
> >
> --
> BRs
>
> Sandy(Li Changqing)
>