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Makefile: add BR_BUILDING variable

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Some packages do some sanity checks on their configuration, for
example linux checks that the defconfig string is not empty when a
defconfig is used. Such checks are currently always performed, except
when the 'source' target is part of make goals.

This is problematic for two reasons:

 - Other targets such as 'source-check', 'external-deps' or
   'legal-info', that do not consist in doing a build, cannot be
   executed in such situations.

 - The current code removes the check as soon as one of the targets is
   source. But if there are other non-source targets called at the
   same time, the checks are ignored.

This commit therefore introduces an internal variable called
BR_BUILDING, which tells packages if we are actually building or
not. A variable nobuild_targets indicates the targets that we do not
consider as being build targets.

For the moment, nobuild_targets only contains 'source', to be
completely iso-functional.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Acked-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
This commit is contained in:
Thomas Petazzoni 2015-04-26 11:51:14 +02:00
parent ae473ca446
commit 256f142bf6
1 changed files with 16 additions and 0 deletions
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16
Makefile
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@ -77,6 +77,22 @@ noconfig_targets := menuconfig nconfig gconfig xconfig config oldconfig randconf
randpackageconfig allyespackageconfig allnopackageconfig \ randpackageconfig allyespackageconfig allnopackageconfig \
print-version olddefconfig print-version olddefconfig
# Some global targets do not trigger a build, but are used to collect
# metadata, or do various checks. When such targets are triggered,
# some packages should not do their configuration sanity
# checks. Provide them a BR_BUILDING variable set to 'y' when we're
# actually building and they should do their sanity checks.
#
# We're building in two situations: when MAKECMDGOALS is empty
# (default target is to build), or when MAKECMDGOALS contains
# something else than one of the nobuild_targets.
nobuild_targets := source
ifeq ($(MAKECMDGOALS),)
BR_BUILDING = y
else ifneq ($(filter-out $(nobuild_targets),$(MAKECMDGOALS)),)
BR_BUILDING = y
endif
# Strip quotes and then whitespaces # Strip quotes and then whitespaces
qstrip = $(strip $(subst ",,$(1))) qstrip = $(strip $(subst ",,$(1)))
#")) #"))