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pkg-infra: allow dumping reverse dependencies of a package

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Finding the packages that select another one in a specific configuration
is not very trivial:

  - when optional, the dependency is not expressed in Kconfig

  - looking at the .mk files is not very nice.

Introduce a way to dump reverse dependencies of packages, i.e. the list
of packages that directly depend on that package. Like for direct
dependencies, we limit the list to the first-order reverse dependencies.

Document it in the main help; use the opportunity to also document
foo-show-depends.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Arnout Vandecappelle <arnout@mind.be>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
This commit is contained in:
Yann E. MORIN 2016-10-23 17:28:51 +02:00 committed by Thomas Petazzoni
parent 0292ec5f34
commit 56cf561293
2 changed files with 9 additions and 0 deletions
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2
Makefile
View File

@ -974,6 +974,8 @@ help:
@echo ' <pkg>-depends - Build <pkg>'\''s dependencies'
@echo ' <pkg>-configure - Build <pkg> up to the configure step'
@echo ' <pkg>-build - Build <pkg> up to the build step'
@echo ' <pkg>-show-depends - List packages on which <pkg> depends'
@echo ' <pkg>-show-rdepends - List packages which have <pkg> as a dependency'
@echo ' <pkg>-graph-depends - Generate a graph of <pkg>'\''s dependencies'
@echo ' <pkg>-dirclean - Remove <pkg> build directory'
@echo ' <pkg>-reconfigure - Restart the build from the configure step'

7
package/pkg-generic.mk
View File

@ -698,6 +698,9 @@ $(1)-show-version:
$(1)-show-depends:
@echo $$($(2)_FINAL_ALL_DEPENDENCIES)
$(1)-show-rdepends:
@echo $$($(2)_RDEPENDENCIES)
$(1)-graph-depends: graph-depends-requirements
@$$(INSTALL) -d $$(GRAPHS_DIR)
@cd "$$(CONFIG_DIR)"; \
@ -854,6 +857,10 @@ $$(foreach pkg,$$($(2)_PROVIDES),\
$$(eval $$(call virt-provides-single,$$(pkg),$$(call UPPERCASE,$$(pkg)),$(1))$$(sep)))
endif
# Register package as a reverse-dependencies of all its dependencies
$$(eval $$(foreach p,$$($(2)_FINAL_ALL_DEPENDENCIES),\
$$(call UPPERCASE,$$(p))_RDEPENDENCIES += $(1)$$(sep)))
# Ensure unified variable name conventions between all packages Some
# of the variables are used by more than one infrastructure; so,
# rather than duplicating the checks in each infrastructure, we check