path: root/fs
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authorGravatar Yann E. MORIN <yann.morin.1998@free.fr>2019-03-03 11:16:35 +0100
committerGravatar Thomas Petazzoni <thomas.petazzoni@bootlin.com>2019-03-17 15:39:12 +0100
commit870f37fe044b98fdd393227c746bb00ecfa7184a (patch)
tree11d3bf92f39c85073e501eb0e4713f1391ac9393 /fs
parent29aeb02aa07ff04b25298404b5289d0972ad990e (diff)
core: add make-based full-dependency list
Currently, when we need to build the full dependency graph, we call make to show the list of packages (make show-targets), and then call it again and again iteratively while it returns new packages. Since calling make will parse the whole set of our Makefiles, this takes quite a bit of time (~4s each here), and the total can get pretty long. However, make being make, already builds the whole dependency tree information, so we can just ask for it. Add a new top-level rule 'show-dependency-tree' that displays the whole set of dependencies for all packages. For each package, its name, type and version is displayed, then all the direct, first-level dependencies are dumped. We choose a format that is not unlike the dot-graph format, because it is both easy to read as a human, and easy to parse as a machine: foo: target 1.2.3 foo -> bar host-meh bar: target virtual bar -> buz buz: target 2.3.4 buz -> host-meh: host virtual host-meh -> host-bleark host-bleark: host 3.4.5 host-bleark -> rootfs-meh: host rootfs-meh -> host-bleark To be noted: rootfs are currently reported as if they were 'host' packages, to stay aligned with how graph-depends currently treats them. Ideally, graph-depends could be enhanced to recognise them separately, but that is another story. For just plain defconfig, which is about the smallest config we can have with an internal toolchain, we already have a seven-fold improvement (with the graph-depends rule modified to not run the pdf generation, to be able to just compare the tree generation): $ time make graph-depends real 0m27.344s $ time make show-dependency-tree real 0m3.848s >From defconfig, C++, wchar, locales, ssp, and allyespackageconfig, tweaked for even more packages (qt5 not qt4, luajit to avoid multi providers, etc...), the timings are (graph-depends still modified to not generate the pdf): $ time make graph-depends real 1m56.459s $ time make show-dependency-tree real 0m5.748s There. I don't think those numbers need any explanation whatsoever; they do speak on their own. OK, for maths sake, the ratio is about twenty-fold. So, "yeah", I guess... ;-) Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr> Cc: Thomas Petazzoni <thomas.petazzoni@bootlin.com> Cc: Thomas De Schampheleire <patrickdepinguin@gmail.com> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Diffstat (limited to 'fs')
1 files changed, 8 insertions, 0 deletions
diff --git a/fs/common.mk b/fs/common.mk
index a560417c6c..daa43efd75 100644
--- a/fs/common.mk
+++ b/fs/common.mk
@@ -47,6 +47,10 @@ ROOTFS_COMMON_DEPENDENCIES = \
+rootfs-common-show-dependency-tree: $(patsubst %,%-show-dependency-tree,$(ROOTFS_COMMON_DEPENDENCIES))
+ $(info rootfs-common: host)
+ $(info rootfs-common -> $(foreach d,$(ROOTFS_COMMON_DEPENDENCIES),$(d)))
.PHONY: rootfs-common
rootfs-common: $(ROOTFS_COMMON_DEPENDENCIES) target-finalize
@$(call MESSAGE,"Generating root filesystems common tables")
@@ -80,6 +84,10 @@ ROOTFS_$(2)_TARGET_DIR = $$(ROOTFS_$(2)_DIR)/target
ROOTFS_$(2)_DEPENDENCIES += rootfs-common
+rootfs-$(1)-show-dependency-tree: $$(patsubst %,%-show-dependency-tree,$$(ROOTFS_$(2)_DEPENDENCIES))
+ $$(info rootfs-$(1): host)
+ $$(info rootfs-$(1) -> $$(foreach d,$$(ROOTFS_$(2)_DEPENDENCIES),$$(d)))
ifeq ($$(BR2_TARGET_ROOTFS_$(2)_GZIP),y)
ROOTFS_$(2)_COMPRESS_CMD = gzip -9 -c