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selftests: net: rebuild YNL if dependencies changed

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Try to rebuild YNL if either user added a new family or the specs
of the families have changed. Stanislav's ncdevmem cause a false
positive build failure in NIPA because libynl.a isn't rebuilt
after ethtool is added to YNL_GENS.

Note that sha1sum is already used in other parts of the build system.

Acked-by: Stanislav Fomichev <sdf@fomichev.me>
Link: https://patch.msgid.link/20241011230311.2529760-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Jakub Kicinski 2024-10-11 16:03:10 -07:00
parent 2a22bead43
commit 0cb06dc6c4
1 changed files with 13 additions and 2 deletions
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15
tools/testing/selftests/net/ynl.mk
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@ -9,6 +9,8 @@
# YNL_GEN_FILES: TEST_GEN_FILES which need YNL
YNL_OUTPUTS := $(patsubst %,$(OUTPUT)/%,$(YNL_GEN_FILES))
YNL_SPECS := \
$(patsubst %,$(top_srcdir)/Documentation/netlink/specs/%.yaml,$(YNL_GENS))
$(YNL_OUTPUTS): $(OUTPUT)/libynl.a
$(YNL_OUTPUTS): CFLAGS += \
@ -16,10 +18,19 @@ $(YNL_OUTPUTS): CFLAGS += \
-I$(top_srcdir)/tools/net/ynl/lib/ \
-I$(top_srcdir)/tools/net/ynl/generated/
$(OUTPUT)/libynl.a:
# Make sure we rebuild libynl if user added a new family. We can't easily
# depend on the contents of a variable so create a fake file with a hash.
YNL_GENS_HASH := $(shell echo $(YNL_GENS) | sha1sum | cut -c1-8)
$(OUTPUT)/.libynl-$(YNL_GENS_HASH).sig:
$(Q)rm -f $(OUTPUT)/.libynl-*.sig
$(Q)touch $(OUTPUT)/.libynl-$(YNL_GENS_HASH).sig
$(OUTPUT)/libynl.a: $(YNL_SPECS) $(OUTPUT)/.libynl-$(YNL_GENS_HASH).sig
$(Q)rm -f $(top_srcdir)/tools/net/ynl/libynl.a
$(Q)$(MAKE) -C $(top_srcdir)/tools/net/ynl GENS="$(YNL_GENS)" libynl.a
$(Q)cp $(top_srcdir)/tools/net/ynl/libynl.a $(OUTPUT)/libynl.a
EXTRA_CLEAN += \
$(top_srcdir)/tools/net/ynl/lib/__pycache__ \
$(top_srcdir)/tools/net/ynl/lib/*.[ado]
$(top_srcdir)/tools/net/ynl/lib/*.[ado] \
$(OUTPUT)/.libynl-*.sig