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From fcffd0176b3394cc664d9bf5b31b053253323bfb Mon Sep 17 00:00:00 2001
From: Sam Ravnborg <sam@ravnborg.org>
Date: Tue, 26 Dec 2017 16:47:16 +0100
Subject: [PATCH 1/4] build: fix that defaultenv is always rebuilt
Using following pattern:
target: prerequisite FORCE
$(call cmd,foo)
is almost always wrong. Due to FORCE target will be rebuilt
using cmd_foo no mater the timestamps.
The following pattern:
target: prerequisite FORCE
$(call if_changed,foo)
Will call cmd_foo only if:
- target is not updated
- or command to built target has changed
But to make this work target must be added to the
list af targets built.
This can be done by assigning target to extra-y or targets.
Use the latter pattern for defaultenv to avoid rebuilding
the environmentt for each build.
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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Signed-off-by: Jan Luebbe <jlu@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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DFU is for device firmware upgrade, but for development purposes it's
sometmes useful to just start a kernel vie DFU. This adds a boot option
for doing this and also the corresponding counterpart on the host. With
this it's possible to boot a system with:
scripts/dfuboot.sh -k linuximage -d dtb -c "root=ubi0:root ubi.mtd=ubi rootfstype=ubifs ignore_loglevel"
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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We can compile barebox for multiple boards at once, but currently
they all share a single default environment. This patch adds a
defaultenv_append() which boards can call to customize the default
environment during runtime. Each board now generate default environment
snippets using bbenv-y and add them during runtime with defaultenv_append()
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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