From: bryan newbold <bnewb...@robocracy.org>
These allow the generated kernel's build metadata to be defined explicitly.
This metadata is reported, eg, at boot time and in `uname -a` on running
systems. If the variables aren't configured, the current build system username
and hostname are used as normal.
The motivation for this option is to achive reproducible (bit-for-bit
identical) kernel builds of official openwrt releases.
Signed-off-by: bryan newbold <bnewb...@robocracy.org>
---
config/Config-kernel.in | 16 ++++++++++++++++
include/kernel-defaults.mk | 2 ++
2 files changed, 18 insertions(+)
diff --git a/config/Config-kernel.in b/config/Config-kernel.in
index 6e79bae..c93bbde 100644
--- a/config/Config-kernel.in
+++ b/config/Config-kernel.in
@@ -4,6 +4,22 @@
# See /LICENSE for more information.
#
+config KERNEL_BUILD_USER
+ string "Custom Kernel Build User Name"
+ default ""
+ help
+ Sets the Kernel build user string, which for example will be returned
+ by 'uname -a' on running systems.
+ If not set, uses system user at build time.
+
+config KERNEL_BUILD_DOMAIN
+ string "Custom Kernel Build Domain Name"
+ default ""
+ help
+ Sets the Kernel build domain string, which for example will be
+ returned by 'uname -a' on running systems.
+ If not set, uses system hostname at build time.
+
config KERNEL_PRINTK
bool "Enable support for printk"
default y
diff --git a/include/kernel-defaults.mk b/include/kernel-defaults.mk
index 052b2b3..63f996a 100644
--- a/include/kernel-defaults.mk
+++ b/include/kernel-defaults.mk
@@ -10,6 +10,8 @@ KERNEL_MAKEOPTS := -C $(LINUX_DIR) \
CROSS_COMPILE="$(KERNEL_CROSS)" \
ARCH="$(LINUX_KARCH)" \
KBUILD_HAVE_NLS=no \
+ KBUILD_BUILD_USER="$(CONFIG_KERNEL_BUILD_USER)" \
+ KBUILD_BUILD_HOST="$(CONFIG_KERNEL_BUILD_DOMAIN)" \
CONFIG_SHELL="$(BASH)" \
$(if $(findstring c,$(OPENWRT_VERBOSE)),V=1,V='') \
$(if $(PKG_BUILD_ID),LDFLAGS_MODULE=--build-id=0x$(PKG_BUILD_ID))
--
2.7.0
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