Inject fake timestamps into the build via faketime to produce the exact
same binaries.
Signed-off-by: Florian Bäuerle <florian.baeue...@allegion.com>
---
platforms/barebox.in | 10 ++++++++++
rules/barebox.make | 16 +++++++++++++++-
2 files changed, 25 insertions(+), 1 deletion(-)
diff --git a/platforms/barebox.in b/platforms/barebox.in
index 645366e93..5bc2f08b6 100644
--- a/platforms/barebox.in
+++ b/platforms/barebox.in
@@ -13,6 +13,7 @@ menuconfig BAREBOX
select HOST_OPENSSL if BAREBOX_NEEDS_HOST_OPENSSL
select HOST_IMX_CST if BAREBOX_NEEDS_HOST_IMX_CST
select HOST_LZOP if BAREBOX_NEEDS_HOST_LZOP
+ select HOST_FAKETIME if BAREBOX_REPRODUCIBLE
prompt "barebox "
bool
help
@@ -50,6 +51,15 @@ config BAREBOX_EXTRA_ENV_PATH
Directories and files to add to the builtin barebox environment.
Relative paths must be relative to the platformconfigdir.
+config BAREBOX_REPRODUCIBLE
+ prompt "build reproducibly"
+ bool
+ default n
+ help
+ With this, fake timestamps are injected to the barebox build, so the
+ resulting barebox images are identical when the sources haven't been
+ changed.
+
config BAREBOX_BAREBOXENV
prompt "install 'bareboxenv'"
bool
diff --git a/rules/barebox.make b/rules/barebox.make
index a6ec3c394..ad160b3ba 100644
--- a/rules/barebox.make
+++ b/rules/barebox.make
@@ -45,6 +45,20 @@ BAREBOX_ENV := \
KCONFIG_NOTIMESTAMP=1 \
pkg_wrapper_blacklist="$(BAREBOX_WRAPPER_BLACKLIST)"
+ifdef PTXCONF_BAREBOX_REPRODUCIBLE
+BAREBOX_FAKE_TIMESTAMP := \
+ $(shell echo $(BAREBOX_VERSION) | \
+ sed -E "s/([0-9]{4})\.([0-9]{1,2}).*/\1-\2-01 00:00:00/")
+BAREBOX_FAKETIME := faketime -f "$(BAREBOX_FAKE_TIMESTAMP)"
+BAREBOX_ENV := $(BAREBOX_ENV) \
+ KBUILD_BUILD_TIMESTAMP="$(BAREBOX_FAKE_TIMESTAMP)" \
+ KBUILD_BUILD_VERSION="0" \
+ KBUILD_BUILD_USER="ptxdist" \
+ KBUILD_BUILD_HOST="ptxdist"
+else
+BAREBOX_FAKETIME :=
+endif
+
BAREBOX_MAKEVARS := \
V=$(PTXDIST_VERBOSE) \
HOSTCC=$(HOSTCC) \
@@ -113,7 +127,7 @@ ifdef PTXCONF_BAREBOX_EXTRA_ENV
endif
@+cd $(BAREBOX_DIR) && $(BAREBOX_PATH) $(BAREBOX_ENV) \
- $(MAKE) $(BAREBOX_MAKEVARS)
+ $(BAREBOX_FAKETIME) $(MAKE) $(BAREBOX_MAKEVARS)
@$(call touch)
# ----------------------------------------------------------------------------
--
2.19.0
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