Re: [PATCH] gnu: gcc-4.9: Update to 4.9.4.

[Carlos Sánchez de La Lama]

Hi Marius, Mark,

> Only packages with a large impact in terms of rebuilds (as calculated by
> `guix refresh -l `). Obviously gcc is one such package.

> http://lists.gnu.org/archive/html/guix-devel/2016-10/msg00933.html

Thanks! That is exactly the information I was looking for.

> Most changes go to 'master' first and are later merged into
> 'core-updates'.  However, changes that would force a large number of
> rebuilds need to be pushed to another branch, to allow our build farm to
> rebuild before its merged to 'master'.

Understood, makes a lot of sense.

> If you are porting to a new architecture, I would definitely recommend
> basing your work on 'core-updates', which will likely be merged into
> 'master' in the next two weeks.  If you need gcc-4.9.4, that's another
> reason to base your work on 'core-updates'.

I am (I think) almost there, I expect to be able to succesfully build
hello on my ppc machine soon (it's a slow machine, so iterations take
time). I do not feel like changing to core-updates now (though I would
have been better had I worked there since the beggining). Once I have
bootstrapped, I will review the changes and rebase the "core" ones to
core-updates. I should be there before two weeks' time.

Thanks!

Carlos

Re: [PATCH] gnu: gcc-4.9: Update to 4.9.4.

[Mark H Weaver]

csanchez...@gmail.com (Carlos Sánchez de La Lama) writes:

>> On Mon, Oct 24, 2016 at 09:51:53AM +0200, Carlos Sánchez de La Lama wrote:
>>> gcc-4.9.3 has a bug in long double isinf builtin on PowerPC, which
>>> affects glibc versions >= 2.23.
>>> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70117
>>> 
>>> * gnu/packages/gcc.scm (gcc-4.9): Update to 4.9.4.
>>
>> Is this different from what we have on core-updates?
>>
>> http://git.savannah.gnu.org/cgit/guix.git/tree/gnu/packages/gcc.scm?h=core-updates#n339
>
> Not at all. I am not tracking core-updates, so I had missed that. I
> will check there in the future. Sorry about that.
>
> BTW, is there described somewhere which kind of updates go to
> core-updates first? Does everything go first to core-updates?

Most changes go to 'master' first and are later merged into
'core-updates'.  However, changes that would force a large number of
rebuilds need to be pushed to another branch, to allow our build farm to
rebuild before its merged to 'master'.

'gcc-4.9' is our default compiler, so it would force a rebuild of
_everything_.  Changes like that are precisely what 'core-updates' is
for.

> I am trying to understand to decide on whether I should use cote-updates
> as a basis for my contributions instead of master.

If you are porting to a new architecture, I would definitely recommend
basing your work on 'core-updates', which will likely be merged into
'master' in the next two weeks.  If you need gcc-4.9.4, that's another
reason to base your work on 'core-updates'.

Thanks for your efforts!

  Mark

Re: [PATCH] gnu: gcc-4.9: Update to 4.9.4.

[Marius Bakke]

Carlos Sánchez de La Lama  writes:

>
> BTW, is there described somewhere which kind of updates go to
> core-updates first? Does everything go first to core-updates?

Only packages with a large impact in terms of rebuilds (as calculated by
`guix refresh -l `). Obviously gcc is one such package.

Soon there will also be a "staging" branch for packages with a lesser
impact, but still large enough that it's worth building and testing them
on Hydra before merging to master.

See this post for more information:

http://lists.gnu.org/archive/html/guix-devel/2016-10/msg00933.html


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Re: [PATCH] gnu: gcc-4.9: Update to 4.9.4.

[Carlos Sánchez de La Lama]

> On Mon, Oct 24, 2016 at 09:51:53AM +0200, Carlos Sánchez de La Lama wrote:
>> gcc-4.9.3 has a bug in long double isinf builtin on PowerPC, which
>> affects glibc versions >= 2.23.
>> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70117
>> 
>> * gnu/packages/gcc.scm (gcc-4.9): Update to 4.9.4.
>
> Is this different from what we have on core-updates?
>
> http://git.savannah.gnu.org/cgit/guix.git/tree/gnu/packages/gcc.scm?h=core-updates#n339

Not at all. I am not tracking core-updates, so I had missed that. I
will check there in the future. Sorry about that.

BTW, is there described somewhere which kind of updates go to
core-updates first? Does everything go first to core-updates?

I am trying to understand to decide on whether I should use cote-updates
as a basis for my contributions instead of master.

Thanks!

Carlos

Re: [PATCH] gnu: gcc-4.9: Update to 4.9.4.

[Leo Famulari]

On Mon, Oct 24, 2016 at 09:51:53AM +0200, Carlos Sánchez de La Lama wrote:
> gcc-4.9.3 has a bug in long double isinf builtin on PowerPC, which
> affects glibc versions >= 2.23.
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70117
> 
> * gnu/packages/gcc.scm (gcc-4.9): Update to 4.9.4.

Is this different from what we have on core-updates?

http://git.savannah.gnu.org/cgit/guix.git/tree/gnu/packages/gcc.scm?h=core-updates#n339