[Buildroot] [PATCH 2/3] defconfigs: use the new headers-version-same-as-kernel-version option
Yann E. MORIN
yann.morin.1998 at free.fr
Wed Jan 20 21:58:21 UTC 2016
Thomas, All,
On 2016-01-20 21:38 +0100, Thomas Petazzoni spake thusly:
> On Wed, 20 Jan 2016 19:34:29 +0100, Yann E. MORIN wrote:
> > Now that we can say that the linux headers version should match that of
> > the kernel to be built, we inverse the logic in our defconfigs, as it is
> > more sensible that way.
> >
> > And also because we'll get rid of the former, converse kernel-same-as-headers
> > option.
> >
> > Signed-off-by: "Yann E. MORIN" <yann.morin.1998 at free.fr>
>
> In this commit, you are changing the defconfigs that use
> BR2_LINUX_KERNEL_SAME_AS_HEADERS. But I am wondering if we shouldn't
> simply change *all* defconfigs to use this new feature. Essentially all
> defconfigs have to worry about selecting a kernel headers version that
> matches the kernel version they use. We could switch them all to use
> your new mechanism, no?
Well, I think it may be worse than that, in fact... Let's see what
happens with a trivial defconfig from before this patch, with the
default toolchain and the kernel settings:
BR2_LINUX_KERNEL=y
This would give:
BR2_KERNEL_HEADERS_4_4=y
BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_4=y
BR2_TOOLCHAIN_HEADERS_AT_LEAST="4.4"
BR2_LINUX_KERNEL=y
BR2_LINUX_KERNEL_LATEST_VERSION=y
Now we use that defconfig after this patch, this gives:
BR2_KERNEL_HEADERS_AS_KERNEL=y
BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_REALLY_OLD=y
BR2_LINUX_KERNEL=y
BR2_LINUX_KERNEL_VERSION="4.4"
And boom, we've lost BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_4=y
I have no idea how we could solve this. I doubt we want to add anything
like BR2_LINUX_KERNEL_AT_LEAST_4_4 and the likes... :-/
Ideas?
Regards,
Yann E. MORIN.
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