build: use perl instead of GNU date for KBUILD_BUILD_TIMESTAMP

[openwrt/openwrt.git] / include / kernel-defaults.mk

diff --git a/include/kernel-defaults.mk b/include/kernel-defaults.mk
index f3b5e421d1db3ef8d9c9c760e9a7a18e2b6db46f..2c4bcec4746178da9a25181eefe4726c4a67b6da 100644 (file)
--- a/include/kernel-defaults.mk
+++ b/include/kernel-defaults.mk
@@ -5,11 +5,21 @@
 # See /LICENSE for more information.
 #
 
+ifneq ($(SOURCE_DATE_EPOCH),)
+  ifndef DUMP
+    KBUILD_BUILD_TIMESTAMP:=$(shell perl -e 'print scalar gmtime($(SOURCE_DATE_EPOCH))')
+  endif
+endif
+
 KERNEL_MAKEOPTS := -C $(LINUX_DIR) \
        HOSTCFLAGS="$(HOST_CFLAGS) -Wall -Wmissing-prototypes -Wstrict-prototypes" \
        CROSS_COMPILE="$(KERNEL_CROSS)" \
        ARCH="$(LINUX_KARCH)" \
        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="$(KBUILD_BUILD_TIMESTAMP)" \
+       KBUILD_BUILD_VERSION="0" \
        CONFIG_SHELL="$(BASH)" \
        $(if $(findstring c,$(OPENWRT_VERBOSE)),V=1,V='') \
        $(if $(PKG_BUILD_ID),LDFLAGS_MODULE=--build-id=0x$(PKG_BUILD_ID))
@@ -29,6 +39,10 @@ ifdef CONFIG_USE_SPARSE
   KERNEL_MAKEOPTS += C=1 CHECK=$(STAGING_DIR_HOST)/bin/sparse
 endif
 
+ifneq ($(strip $(CONFIG_KERNEL_GIT_CLONE_URI)),"")
+ KERNEL_MAKEOPTS += LOCALVERSION=
+endif
+
 export HOST_EXTRACFLAGS=-I$(STAGING_DIR_HOST)/include
 
 # defined in quilt.mk
@@ -48,7 +62,7 @@ ifeq ($(strip $(CONFIG_EXTERNAL_KERNEL_TREE)),"")
     define Kernel/Prepare/Default
        xzcat $(DL_DIR)/$(LINUX_SOURCE) | $(TAR) -C $(KERNEL_BUILD_DIR) $(TAR_OPTIONS)
        $(Kernel/Patch)
-       touch $(LINUX_DIR)/.quilt_used
+       $(if $(QUILT),touch $(LINUX_DIR)/.quilt_used)
     endef
   else
     define Kernel/Prepare/Default
@@ -103,13 +117,14 @@ define Kernel/SetNoInitramfs
 endef
 
 define Kernel/Configure/Default
+       rm -f $(LINUX_DIR)/localversion
        $(LINUX_CONF_CMD) > $(LINUX_DIR)/.config.target
 # copy CONFIG_KERNEL_* settings over to .config.target
        awk '/^(#[[:space:]]+)?CONFIG_KERNEL/{sub("CONFIG_KERNEL_","CONFIG_");print}' $(TOPDIR)/.config >> $(LINUX_DIR)/.config.target
        echo "# CONFIG_KALLSYMS_EXTRA_PASS is not set" >> $(LINUX_DIR)/.config.target
        echo "# CONFIG_KALLSYMS_ALL is not set" >> $(LINUX_DIR)/.config.target
-       echo "# CONFIG_KALLSYMS_UNCOMPRESSED is not set" >> $(LINUX_DIR)/.config.target
-       $(SCRIPT_DIR)/metadata.pl kconfig $(TMP_DIR)/.packageinfo $(TOPDIR)/.config $(KERNEL_PATCHVER) > $(LINUX_DIR)/.config.override
+       echo "CONFIG_KALLSYMS_UNCOMPRESSED=y" >> $(LINUX_DIR)/.config.target
+       $(SCRIPT_DIR)/package-metadata.pl kconfig $(TMP_DIR)/.packageinfo $(TOPDIR)/.config $(KERNEL_PATCHVER) > $(LINUX_DIR)/.config.override
        $(SCRIPT_DIR)/kconfig.pl 'm+' '+' $(LINUX_DIR)/.config.target /dev/null $(LINUX_DIR)/.config.override > $(LINUX_DIR)/.config.set
        $(call Kernel/SetNoInitramfs)
        rm -rf $(KERNEL_BUILD_DIR)/modules
@@ -138,13 +153,15 @@ IMAGES_DIR:=../../x86/boot
 endif
 
 define Kernel/CopyImage
-       $(KERNEL_CROSS)objcopy -O binary $(OBJCOPY_STRIP) -S $(LINUX_DIR)/vmlinux $(LINUX_KERNEL)$(1)
-       $(KERNEL_CROSS)objcopy $(OBJCOPY_STRIP) -S $(LINUX_DIR)/vmlinux $(KERNEL_BUILD_DIR)/vmlinux$(1).elf
-       $(CP) $(LINUX_DIR)/vmlinux $(KERNEL_BUILD_DIR)/vmlinux.debug
-       $(foreach k, \
-               $(if $(KERNEL_IMAGES),$(KERNEL_IMAGES),$(filter-out dtbs,$(KERNELNAME))), \
-               $(CP) $(LINUX_DIR)/arch/$(LINUX_KARCH)/boot/$(IMAGES_DIR)/$(k) $(KERNEL_BUILD_DIR)/$(k)$(1); \
-       )
+       cmp -s $(LINUX_DIR)/vmlinux $(KERNEL_BUILD_DIR)/vmlinux$(1).debug || { \
+               $(KERNEL_CROSS)objcopy -O binary $(OBJCOPY_STRIP) -S $(LINUX_DIR)/vmlinux $(LINUX_KERNEL)$(1); \
+               $(KERNEL_CROSS)objcopy $(OBJCOPY_STRIP) -S $(LINUX_DIR)/vmlinux $(KERNEL_BUILD_DIR)/vmlinux$(1).elf; \
+               $(CP) $(LINUX_DIR)/vmlinux $(KERNEL_BUILD_DIR)/vmlinux$(1).debug; \
+               $(foreach k, \
+                       $(if $(KERNEL_IMAGES),$(KERNEL_IMAGES),$(filter-out dtbs,$(KERNELNAME))), \
+                       $(CP) $(LINUX_DIR)/arch/$(LINUX_KARCH)/boot/$(IMAGES_DIR)/$(k) $(KERNEL_BUILD_DIR)/$(k)$(1); \
+               ) \
+       }
 endef
 
 define Kernel/CompileImage/Default