Re: [PATCH] [libc/musl] (v0.1) Add support for musl-libc

["Yann E. MORIN" <yann dot morin dot 1998 at free dot fr>]

Bryan, All,

On 2014-07-18 14:17 -0700, Bryan Hundven spake thusly:
> This change is based on a patch by Timo TerÃs:
>     http://patchwork.ozlabs.org/patch/257187/
> 
> This patch, as the original, is an RFC. Currently a minimal armel- is
> the only target tested. sh[34][a]- support is in crosstool-ng, but not
> in the 020-musl-support.patch.
> 
> Please let me know if you have any comments, feedback, and/or
> suggestions.

So, this patch has stirred a bit of discussions on IRC.

My position is to not have feature-patches against the components,
especially if they have not been blessed by the corresponding upstream.

Having feature-patches to components is globally a problem, because they
might have unexpected and hard-to-find impacts on the compoent. For
example, we have such a situation with (another) musl patch in
Buildroot, that breaks C++ applications that throw exceptions.

I do not want such issues to pop up in crosstool-NG.


However, we've had a very constructive discussion with Bryan on IRC,
about adding musl to crosstool-NG. Here is the plan:

1- add a new config knob that enables using experimental patches. Such
   patches are not located in the same area as other patches, so do not
   get applied by default, unless that new config knob is enabled.

2- for each experimental patch added, a corresponding config knob is
   automatically generated, so the user can seelct whatever experimental
   patches he wishes to.

3- add musl as a new C library, but without the biggish gcc patch

4- add the musl patches as experimental patches, with a big README
   stating the experimental status


Note that the experimental patches will be a severly restricted feature.
We'll only add select patches. For now, only the musl patch is
identified as going in. Later, we might add a few others, especially for
llvm. But the list will *not* grow out of proportions.


Thanks for watching the show. You can now resume your normal activities.
;-)

Regards,
Yann E. MORIN.

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