[Buildroot] [PATCH 7/8 v2] core: add make-based full-dependency list
Yann E. MORIN
yann.morin.1998 at free.fr
Sun Mar 3 10:16:35 UTC 2019
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 at free.fr>
Cc: Thomas Petazzoni <thomas.petazzoni at bootlin.com>
Cc: Thomas De Schampheleire <patrickdepinguin at gmail.com>
---
Makefile | 4 ++++
fs/common.mk | 8 ++++++++
package/pkg-generic.mk | 4 ++++
3 files changed, 16 insertions(+)
diff --git a/Makefile b/Makefile
index 3d95d066fb..7d127e3799 100644
--- a/Makefile
+++ b/Makefile
@@ -876,6 +876,10 @@ graph-depends-requirements:
@dot -? >/dev/null 2>&1 || \
{ echo "ERROR: The 'dot' program from Graphviz is needed for graph-depends" >&2; exit 1; }
+.PHONY: show-dependency-tree
+show-dependency-tree: $(patsubst %,%-show-dependency-tree,$(PACKAGES) $(TARGETS_ROOTFS))
+ @:
+
.PHONY: graph-depends
graph-depends: graph-depends-requirements
@$(INSTALL) -d $(GRAPHS_DIR)
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 = \
$(BR2_TAR_HOST_DEPENDENCY) \
$(if $(PACKAGES_USERS)$(ROOTFS_USERS_TABLES),host-mkpasswd)
+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 ($$(BR2_TARGET_ROOTFS_$(2)_GZIP),y)
ROOTFS_$(2)_COMPRESS_EXT = .gz
ROOTFS_$(2)_COMPRESS_CMD = gzip -9 -c
diff --git a/package/pkg-generic.mk b/package/pkg-generic.mk
index 0d17e62a70..62c2e221f7 100644
--- a/package/pkg-generic.mk
+++ b/package/pkg-generic.mk
@@ -850,6 +850,10 @@ $(1)-show-build-order: $$(patsubst %,%-show-build-order,$$($(2)_FINAL_ALL_DEPEND
@:
$$(info $(1))
+$(1)-show-dependency-tree: $$(patsubst %,%-show-dependency-tree,$$($(2)_FINAL_ALL_DEPENDENCIES))
+ $$(info $(1): $(4) $$(if $$($(2)_IS_VIRTUAL),virtual,$$($(2)_DL_VERSION)))
+ $$(info $(1) -> $$(foreach d,$$($(2)_FINAL_ALL_DEPENDENCIES),$$(d)))
+
$(1)-graph-depends: graph-depends-requirements
$(call pkg-graph-depends,$(1),--direct)
--
2.14.1
More information about the buildroot
mailing list