[Buildroot] [PATCH] core: add rule to dump packages' build order
Yann E. MORIN
yann.morin.1998 at free.fr
Sun Apr 2 13:03:38 UTC 2017
When debugging hidden dependencies, the build order is very important.
Most notably, it is interesting to identify potential culprits.
Add a new top-level rule, show-biuld-order, that dumps all the packages
in the order they would get built.
Note that there are a few differences with show-targets:
- more packages are reported, becasue show-targets does not report
host packages that have no prompt;
- the output is line-based, because we're using $(info $(1)); getting
a single output line like show-targets would require we use an
actual command, like printf '%s ' $(1); but that takes a lot of
time, while $(info $(1)) is almost instantaneous (the time to parse
the Makefiles);
- rootfs targets are not reported.
Signed-off-by: "Yann E. MORIN" <yann.morin.1998 at free.fr>
Cc: Thomas Petazzoni <thomas.petazzoni at free-electrons.com>
Cc: Arnout Vandecappelle <arnout at mind.be>
Cc: Peter Korsgaard <peter at korsgaard.com>
---
Makefile | 2 ++
package/pkg-generic.mk | 3 +++
2 files changed, 5 insertions(+)
diff --git a/Makefile b/Makefile
index 941bf78..919d589 100644
--- a/Makefile
+++ b/Makefile
@@ -757,6 +757,8 @@ legal-info: dirs legal-info-clean legal-info-prepare $(foreach p,$(PACKAGES),$(p
show-targets:
@echo $(PACKAGES) $(TARGETS_ROOTFS)
+show-build-order: $(patsubst %,%-show-build-order,$(PACKAGES))
+
graph-build: $(O)/build/build-time.log
@install -d $(GRAPHS_DIR)
$(foreach o,name build duration,./support/scripts/graph-build-time \
diff --git a/package/pkg-generic.mk b/package/pkg-generic.mk
index 31dbc54..3b26e6b 100644
--- a/package/pkg-generic.mk
+++ b/package/pkg-generic.mk
@@ -737,6 +737,9 @@ $(1)-show-depends:
$(1)-show-rdepends:
@echo $$($(2)_RDEPENDENCIES)
+$(1)-show-build-order: $$(patsubst %,%-show-build-order,$$($(2)_FINAL_ALL_DEPENDENCIES))
+ $$(info $(1))
+
$(1)-graph-depends: graph-depends-requirements
$(call pkg-graph-depends,$(1),--direct)
--
2.9.3
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