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perf doc: Add support for KBUILD_BUILD_TIMESTAMP

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When building man pages from a Git checkout, we consistently set the
man page date based on when the input was last changed.  Otherwise, it
defaults to the build time, which is not reproducible.

Allow the date to be set through the KBUILD_BUILD_TIMESTAMP variable,
as for timestamps in the kernel itself.

Signed-off-by: Ben Hutchings <benh@debian.org>
Acked-by: Ian Rogers<irogers@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Salvatore Bonaccorso <carnil@debian.org>
Link: https://lore.kernel.org/r/ZF/1F1P+b9qZ/vVH@decadent.org.uk
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Ben Hutchings 2023-05-13 22:37:43 +02:00 committed by Arnaldo Carvalho de Melo
parent 21a165133c
commit 61b3d2107d
1 changed files with 7 additions and 3 deletions
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10
tools/perf/Documentation/Makefile
View file

@ -250,9 +250,13 @@ $(MAN_HTML): $(OUTPUT)%.html : %.txt
$(ASCIIDOC_EXTRA) -aperf_version=$(PERF_VERSION) -o $@+ $< && \
mv $@+ $@
# Generate date from git log of the doc input file
PERF_DATE = $(shell git log -1 --pretty="format:%cd" \
--date=short --no-show-signature $<)
# Generate date from either KBUILD_BUILD_TIMESTAMP or git log of
# the doc input file
PERF_DATE = $(strip \
$(if $(KBUILD_BUILD_TIMESTAMP), \
$(shell date -u -d '$(KBUILD_BUILD_TIMESTAMP)' +%Y-%m-%d), \
$(shell git log -1 --pretty="format:%cd" \
--date=short --no-show-signature $<)))
ifdef USE_ASCIIDOCTOR
$(OUTPUT)%.1 $(OUTPUT)%.5 $(OUTPUT)%.7 : %.txt