diff options
| author | Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org> | 2016-11-23 13:58:44 +0100 |
|---|---|---|
| committer | Thomas Petazzoni <thomas.petazzoni@free-electrons.com> | 2016-11-23 22:56:49 +0100 |
| commit | af109fb44469a89b2576d167b02f02a811d13c12 (patch) | |
| tree | 851afd72048956cfcdf2570cc87a18769183291f /linux | |
| parent | 59f9c4ca9feb2c070df508c7196f06a6e87307b4 (diff) | |
linux: override build timestamp for reproducible builds
Linux kernel include a few information about build environment in its binary.
This feature is incompatible with BR2_REPRODUCIBLE. This patch overload build
information when BR2_REPRODUCIBLE is enabled.
Note that usage of KBUILD_BUILD_TIMESTAMP is not mandatory since Buildroot
use `fakedate'. However, native solution is prefered when upstream
provide one.
Signed-off-by: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
Reviewed-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Jérôme Pouiller <jezz@sysmic.org>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Diffstat (limited to 'linux')
| -rw-r--r-- | linux/linux.mk | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/linux/linux.mk b/linux/linux.mk index 988427ca7..7e826ccdf 100644 --- a/linux/linux.mk +++ b/linux/linux.mk @@ -94,6 +94,14 @@ LINUX_MAKE_ENV = \ $(TARGET_MAKE_ENV) \ BR_BINARIES_DIR=$(BINARIES_DIR) +ifeq ($(BR2_REPRODUCIBLE),y) +LINUX_MAKE_ENV += \ + KBUILD_BUILD_VERSION=1 \ + KBUILD_BUILD_USER=buildroot \ + KBUILD_BUILD_HOST=buildroot \ + KBUILD_BUILD_TIMESTAMP="$(shell date -d @$(SOURCE_DATE_EPOCH))" +endif + # Get the real Linux version, which tells us where kernel modules are # going to be installed in the target filesystem. LINUX_VERSION_PROBED = `$(MAKE) $(LINUX_MAKE_FLAGS) -C $(LINUX_DIR) --no-print-directory -s kernelrelease 2>/dev/null` |