core: add rule to dump packages' build order
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@free.fr>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Cc: Arnout Vandecappelle <arnout@mind.be>
Cc: Peter Korsgaard <peter@korsgaard.com>
Reviewed-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Acked-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
diff --git a/Makefile b/Makefile
index 941bf78..919d589 100644
--- a/Makefile
+++ b/Makefile
@@ -757,6 +757,8 @@
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 \