[OpenWrt-Devel] [PATCH 1/3] build: add support for options

[Jonas Gorski]

On Mon, Aug 11, 2014 at 6:34 PM, Luka Perkov <luka at openwrt.org> wrote:
> On Mon, Aug 11, 2014 at 05:24:32PM +0200, Jonas Gorski wrote:
>> On Mon, Aug 11, 2014 at 5:06 PM, Luka Perkov <luka at openwrt.org> wrote:
>> > On Mon, Aug 11, 2014 at 03:21:58PM +0200, Jonas Gorski wrote:
>> >> And further, in your approach you directly select the options, not
>> >> just change the defaults (in contrast to the default packages), so you
>> >> can't even deselect them anymore.
>> >
>> > You can deselect options with this series. That was the goal and that is
>> > why there are HAVE_* options present. Give it a try.
>>
>> So what is the difference to FEATURES:= then? These already select
>> different HAVE_FOO things. Can't you just add the missing features
>> there?
>
> FEATURES nor DEPENDS are not good candidates for this. They are global
> for target/subtarget. So you can not define in same target/subtarget for
> one profile to include only zImage and for other to include only uImage.
>
> You can see that does not work if you look how Freescale i.MX23/i.MX28
> (mxs) now behaves.

So the clean solution is to make them both work at the same time, not
to add additional workarounds. Correct image generation should not
depend on profile selection. All these options currently alter the way
the single (ubi) rootfs is generated, while they should enable
different rootfs variants to be generated at the same time. This is
the root issue, and this is where it should be fixed. Yes, it isn't
easy to fix, but we should not break it further.


Jonas
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