To build mkimage for the host (which is needed to build an uImage of
the kernel), it is not necessary to configure U-Boot, and therefore to
have a particular board selected.
Therefore, this commit:
* Adds a verification at U-Boot configure step that a U-Boot board
name has been defined
* Sets a default U-Boot version if none has been specified, so that
even when U-Boot isn't selected but we want to build mkimage for
the host, a particular U-Boot version is picked.
* Make the host mkimage target depend only on U-Boot being
downloaded/extracted/patched, and the target mkimage/fw_printenv
targets depend on U-Boot being fully configured.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
A very complicated infrastructure for just a special case, for an
ancient version of U-Boot. Recent versions of U-Boot are reported to
work just fine on Atmel ARM evaluation boards.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Yaboot does not build, hasn't been updated since a long time, and
isn't very common these days on embedded PowerPC platforms.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
