kernel: check SOURCE_DATE_EPOCH before setting KBUILD_BUILD_TIMESTAMP
[openwrt/openwrt.git] / include / kernel-defaults.mk
index 534699b..53e733a 100644 (file)
@@ -12,7 +12,7 @@ KERNEL_MAKEOPTS := -C $(LINUX_DIR) \
        KBUILD_HAVE_NLS=no \
        KBUILD_BUILD_USER="$(call qstrip,$(CONFIG_KERNEL_BUILD_USER))" \
        KBUILD_BUILD_HOST="$(call qstrip,$(CONFIG_KERNEL_BUILD_DOMAIN))" \
-       KBUILD_BUILD_TIMESTAMP="$(shell date -u --date="@$(SOURCE_DATE_EPOCH)")" \
+       $(if $(SOURCE_DATE_EPOCH),KBUILD_BUILD_TIMESTAMP="$(shell date -u --date="@$(SOURCE_DATE_EPOCH)")") \
        KBUILD_BUILD_VERSION="0" \
        CONFIG_SHELL="$(BASH)" \
        $(if $(findstring c,$(OPENWRT_VERBOSE)),V=1,V='') \