[OE-core] how can i add u-boot-fw-utils to my build without u-boot being part of the build?

[Robert P. J. Day]

On Fri, 19 Aug 2016, Tom Rini wrote:

> On Thu, Aug 18, 2016 at 12:41:25PM -0400, Robert P. J. Day wrote:
> >
> >   i want to add the u-boot-fw-utils recipe to my current build,
> > but u-boot is *not* part of the relevant BSP layer -- u-boot is
> > being configured and built elsewhere, and that's not changing for
> > the foreseeable future.
> >
> >   the good news is that those utilities don't need to have any
> > info on the default environment for u-boot -- they need only have
> > access to the environment in flash, and there is a
> > /etc/fw_env.config file that is all set up and ready to go and
> > referring to the correct device and offset in flash.
> >
> >   so how do i specify that i want to add that recipe to my build,
> > while saying, "don't worry about the default environment, you
> > don't need it." can that be done? thanks.
>
> The "easy" way out here is to just set a valid (as in, compiles)
> UBOOT_MACHINE and then not worry about installing U-Boot from the OE
> build.  You can ASSUME_PROVIDED away u-boot itself, but you still
> need to have a UBOOT_MACHINE set so that we configure U-Boot before
> building the tools (And you must configure before building).

  the problem is that the machine is a custom tweaking of an existing
platform in u-boot, so that a regular checkout of u-boot won't have a
defconfig for that machine. the entirety of u-boot for this target
board is configured and built elsewhere, so i'm just trying to figure
out what little i need to supply to get a build of those fw-utils in
my image.

  i suppose i can just use an existing machine that's compatible --
beyond that, i assume all i need to supply is a /etc/fw_env.config
file defining where in flash the environment is to be manipulated.

  i realize this is a weird scenario, it's just what i have to work
with for the time being.

rday

-- 

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Robert P. J. Day                                 Ottawa, Ontario, CANADA
                        http://crashcourse.ca

Twitter:                                       http://twitter.com/rpjday
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