[OE-core] [PATCH 01/42] gcc: Add gcc6 recipes

[Paul Eggleton]

On Thu, 02 Jun 2016 15:19:37 Bruce Ashfield wrote:
> On 2016-06-02 3:15 PM, Paul Eggleton wrote:
> > On Thu, 02 Jun 2016 18:05:35 Martin Jansa wrote:
> >> On Wed, Jun 01, 2016 at 10:23:35AM +1200, Paul Eggleton wrote:
> >>> On Wed, 01 Jun 2016 10:20:23 Paul Eggleton wrote:
> >>>> On Tue, 31 May 2016 11:12:21 Jussi Kukkonen wrote:
> >>>>> On 11 May 2016 at 20:35, Khem Raj <raj.khem at gmail.com> wrote:
> >>>>>> +#BASEURI ?= "${GNU_MIRROR}/gcc/gcc-${PV}/gcc-${PV}.tar.bz2"
> >>>>>> +BASEURI ?= "git://
> >>>>>> github.com/gcc-mirror/gcc;branch=gcc-6-branch;protocol=git"
> >>>>> 
> >>>>> I guess this is where git2_github.com.gcc-mirror.gcc.tar.gz download
> >>>>> comes from? It increased the size of my downloads-directory by >30% --
> >>>>> and I must have quite a bit of old junk in that directory already.
> >>>>> 
> >>>>> Is there no other solution to this than a 2.5G git copy (honest
> >>>>> question, I don't know gcc)?
> >>>> 
> >>>> We went down this road before and it wasn't great for users. There is
> >>>> at
> >>>> least a tarball for 6.1, we'd presumably need some patches on top of
> >>>> that (~43 if we were to simply take what's in the gcc-6-branch between
> >>>> 6.1 and bd9a826, minus the "daily bumps").
> >>> 
> >>> Perhaps that was a little unclear - when I say "we went down this road
> >>> before" I'm agreeing with Jussi - we pointed to a git branch in a
> >>> previous release with the same resulting huge download for everyone,
> >>> something I think we should avoid if at all possible.
> >> 
> >> Maybe it's biggest but at least there is only one copy of it:
> >> 
> >> top 10 in my downloads (archives and then git clones).
> >> 
> >> 823M   
> >> /OE/downloads/git2_git.yoctoproject.org.linux-yocto-3.14.git.tar.gz
> >> 831M   
> >> /OE/downloads/git2_git.yoctoproject.org.linux-yocto-3.10.git.tar.gz
> >> 893M   
> >> /OE/downloads/git2_git.yoctoproject.org.linux-yocto-3.17.git.tar.gz
> >> 934M   
> >> /OE/downloads/git2_git.yoctoproject.org.linux-yocto-3.19.git.tar.gz
> >> 969M   
> >> /OE/downloads/git2_git.yoctoproject.org.linux-yocto-4.1.git.tar.gz
> >> 1.2G   
> >> /OE/downloads/git2_git.yoctoproject.org.linux-yocto-dev.git.tar.gz
> >> 
> >> 2.4G    /OE/downloads/git2_github.com.gcc-mirror.gcc.tar.gz
> >> 
> >> 854M    /OE/downloads/git2/github.com.qtproject.qtwebengine-chromium.git
> >> 
> >> 877M    /OE/downloads/git2/git.yoctoproject.org.linux-yocto-3.10.git
> >> 900M    /OE/downloads/git2/git.yoctoproject.org.linux-yocto-3.14.git
> >> 921M    /OE/downloads/git2/git.yoctoproject.org.linux-yocto-3.17.git
> >> 964M    /OE/downloads/git2/git.yoctoproject.org.linux-yocto-3.19.git
> >> 999M    /OE/downloads/git2/git.yoctoproject.org.linux-yocto-4.1.git
> >> 1.3G    /OE/downloads/git2/git.yoctoproject.org.linux-yocto-dev.git
> >> 2.3G    /OE/downloads/git2/git.yoctoproject.org.linux-yocto-4.4.git
> > 
> > No argument from me there - it does seem a little wasteful given that
> > there must be a huge overlap between those repos.
> 
> In other build systems, I've simply been able to reference a common
> repository for the majority of the blobs. That isn't an option with
> oe/bitbake (as far as I know).

It's possible we could add functionality along those lines to at least save 
download time; disk usage would probably be unaffected though.

> We could also do shallow clones, but I'm also unsure of how well that
> is supported.

I know Chris looked into adding this, I don't recall how far he got.
 
> With the amount of series that are completely rebased and dynamic in
> content, the trees do need to be separate per version. It becomes
> completely un-bisectable and maintainable any other way.

Bisectability is function of how the branch is managed, not the repository - 
surely? Perhaps I'm missing something.

Cheers,
Paul

-- 

Paul Eggleton
Intel Open Source Technology Centre