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build: image: use UTC for zip timestamp

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Zip uses DOS timestamp for mtime which is stored in local time and hence
depends on the timezone of the build system. Force zip to use UTC timezone
to make image builds more reproducible.

Signed-off-by: Sungbo Eo <mans0n@gorani.run>
This commit is contained in:
Sungbo Eo 2022-02-12 17:01:31 +09:00
parent ed364cd4b0
commit e42764cc5f
1 changed files with 1 additions and 2 deletions
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3
include/image-commands.mk
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@ -541,8 +541,7 @@ define Build/zip
rm -rf $@.tmp
mkdir $@.tmp
mv $@ $@.tmp/$(word 1,$(1))
$(STAGING_DIR_HOST)/bin/zip -j -X \
TZ=UTC $(STAGING_DIR_HOST)/bin/zip -j -X \
$(if $(SOURCE_DATE_EPOCH),--mtime="$(SOURCE_DATE_EPOCH)") \
$(wordlist 2,$(words $(1)),$(1)) \
$@ $@.tmp/$(if $(word 1,$(1)),$(word 1,$(1)),$$(basename $@))