Building multiple u-boot binaries in oe-core?

[Ulf Samuelsson <ulf_samuelsson@telia.com>]

I added the functionality for building multiple u-boot binaries to
classic openembedded, but this has not been implemented in oe-core.
I find that rather useful. Anyone disagreeing?

The core of this is:

do_compile () {
     if ! [ "x${UBOOT_MACHINES}" == "x" ] ; then
         for board in ${UBOOT_MACHINES} ; do
             if ! [ `grep ${board}_config Makefile | wc -c` == 0 ] ; then
                 mkdir -p binaries/${board}
                 oe_runmake O=binaries/${board} distclean
                 oe_runmake O=binaries/${board} ${board}_config
                 oe_runmake O=binaries/${board} all
             fi
         done
     else
            oe_runmake ${UBOOT_MACHINE}
            oe_runmake all
     fi
}

Note that I removed the _config part from UBOOT_MACHINES.

At the moment, the binary after youv'e done
"make beagleboard_config; make" will be called:
u-boot-beagleboard_config-${PV}-${PR}.bin

I think "u-boot-beagleboard-${PV}-${PR}.bin" is nicer.

There aren't that many boards in oe-core at the moment.
Isn't this a good time to get rid of UBOOT_MACHINE altogher
and/or redefine it without the "_config"

P.S: I am working on another project right now, so I don't know
when I have time to test this out on oe-core, so anyone
else interested, feel free to implement it

-- 
Best Regards
Ulf Samuelsson