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fs: set per-rootfs variable name

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Like we do for packages with the PKG variable, set ROOTFS to contain the
upper-case name of the rootfs currently being generated.

This will be useful in later patches, when we need more per-rootfs
variables, like a per-rootfs TARGET_DIR for example.

In Makefiles, per-rule variables trickle down the dependency chain, to
all dependencies of that rule, so we have to stop ROOTFS as soon as
we're not in a rootfs. This means we have to stop it at target-finalize
(which is a dependency of all filesystems), and for each package
individually, since some packages (host or target) can be direct
dependencies of filesystems as well.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Cc: Arnout Vandecappelle <arnout@mind.be>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
This commit is contained in:
Yann E. MORIN
2018-03-31 11:05:51 +02:00
committed by Peter Korsgaard
parent 7e9870ce32
commit 2765973e01
3 changed files with 8 additions and 0 deletions
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4
package/pkg-generic.mk
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@@ -384,6 +384,10 @@ endef
define inner-generic-package
# When doing a package, we're definitely not doing a rootfs, but we
# may inherit it via the dependency chain, so we reset it.
$(1): ROOTFS=
# Ensure the package is only declared once, i.e. do not accept that a
# package be re-defined by a br2-external tree
ifneq ($(call strip,$(filter $(1),$(PACKAGES_ALL))),)