[Buildroot] [PATCH v11 0/8] Add support for top-level parallel make

[Fabio Porcedda]

On Mon, Feb 3, 2014 at 10:02 PM, Thomas Petazzoni
<thomas.petazzoni at free-electrons.com> wrote:
> Dear Fabio Porcedda,
>
> On Fri, 10 Jan 2014 11:06:00 +0100, Fabio Porcedda wrote:
>
>> this is a patch set for adding support for top-level parallel make in
>> buildroot, the common problem scattered in buildroot's top-level
>> makefiles is that in the rules it relies on the order of evaluation of
>> the prerequisites, to be able to use top-level parallel make instead
>> of reling on the left to right ordering of evaluation of the
>> prerequisites we must add an explicit rule to describe the
>> dependencies.
>
> We have discussed your patch series today at the Buildroot meeting,
> Peter and I had a look at it. Our plan is to merge it right after
> 2014.02-rc1 is released, into the -next branch, which means that it
> will be part of the 2014.05 release.

That's great.

> That said, there are two changes that we would like to be made, but
> they can be made as follow-up patches:
>
>  * Guarantee that the staging installation is always done before the
>    target installation. Specifically for the uclibc and glibc package,
>    you've added something like:
>
> +# The uclibc-install-target use files from uclibc-install-staging
> +$(UCLIBC_TARGET_INSTALL_TARGET): $(UCLIBC_TARGET_INSTALL_STAGING)
>
>    The problem is that uclibc and glibc are by far not the only
>    packages to make this assumption. There are many packages who
>    install everything to staging, and then pick whatever they need from
>    the staging directory to install things to the target directory. The
>    qt and qt5 packages come to mind, but there are many more.
>    Therefore, we would like these steps to be serialized for each
>    package: first staging installation, then target installation.

Ok, i will send a patch to do that.

>  * Also, in glibc and uClibc, you're doing:
>
> -# Before uClibc is built, we must have the second stage cross-compiler
> -uclibc-build: host-gcc-intermediate
>
> +# Before uClibc is built, we must have the second stage cross-compiler
> +$(UCLIBC_TARGET_BUILD): | host-gcc-intermediate
>
>    But I believe there are a few other tricky cases where the
>    dependencies are "non-standard". I'm thinking of at least:
>
>     - linux/linux-ext-rtai.mk, which does not depends on rtai, but
>       rtai-patch. Not sure that's problematic in this case, but I was
>       wondering.
>
>     - The linux/linux.mk mechanism to rebuild the kernel image after
>       the initramfs image has been produced.
>
> Can you cook follow-up patches for the first issue, and maybe
> review/investigate the second issue if applicable?

Ok, i will send a patch for the first issue and i will investigate
the second issue.

Thanks and best regards
-- 
Fabio Porcedda