linux.mk 16 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410
  1. ################################################################################
  2. #
  3. # Linux kernel target
  4. #
  5. ################################################################################
  6. LINUX_VERSION = $(call qstrip,$(BR2_LINUX_KERNEL_VERSION))
  7. LINUX_LICENSE = GPLv2
  8. LINUX_LICENSE_FILES = COPYING
  9. # Compute LINUX_SOURCE and LINUX_SITE from the configuration
  10. ifeq ($(BR2_LINUX_KERNEL_CUSTOM_TARBALL),y)
  11. LINUX_TARBALL = $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_TARBALL_LOCATION))
  12. LINUX_SITE = $(patsubst %/,%,$(dir $(LINUX_TARBALL)))
  13. LINUX_SOURCE = $(notdir $(LINUX_TARBALL))
  14. BR_NO_CHECK_HASH_FOR += $(LINUX_SOURCE)
  15. else ifeq ($(BR2_LINUX_KERNEL_CUSTOM_LOCAL),y)
  16. LINUX_SITE = $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_LOCAL_PATH))
  17. LINUX_SITE_METHOD = local
  18. else ifeq ($(BR2_LINUX_KERNEL_CUSTOM_GIT),y)
  19. LINUX_SITE = $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_REPO_URL))
  20. LINUX_SITE_METHOD = git
  21. else ifeq ($(BR2_LINUX_KERNEL_CUSTOM_HG),y)
  22. LINUX_SITE = $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_REPO_URL))
  23. LINUX_SITE_METHOD = hg
  24. else
  25. LINUX_SOURCE = linux-$(LINUX_VERSION).tar.xz
  26. ifeq ($(BR2_LINUX_KERNEL_CUSTOM_VERSION),y)
  27. BR_NO_CHECK_HASH_FOR += $(LINUX_SOURCE)
  28. endif
  29. ifeq ($(BR2_LINUX_KERNEL_SAME_AS_HEADERS)$(BR2_KERNEL_HEADERS_VERSION),yy)
  30. BR_NO_CHECK_HASH_FOR += $(LINUX_SOURCE)
  31. endif
  32. # In X.Y.Z, get X and Y. We replace dots and dashes by spaces in order
  33. # to use the $(word) function. We support versions such as 4.0, 3.1,
  34. # 2.6.32, 2.6.32-rc1, 3.0-rc6, etc.
  35. ifeq ($(findstring x2.6.,x$(LINUX_VERSION)),x2.6.)
  36. LINUX_SITE = $(BR2_KERNEL_MIRROR)/linux/kernel/v2.6
  37. else ifeq ($(findstring x3.,x$(LINUX_VERSION)),x3.)
  38. LINUX_SITE = $(BR2_KERNEL_MIRROR)/linux/kernel/v3.x
  39. else ifeq ($(findstring x4.,x$(LINUX_VERSION)),x4.)
  40. LINUX_SITE = $(BR2_KERNEL_MIRROR)/linux/kernel/v4.x
  41. endif
  42. # release candidates are in testing/ subdir
  43. ifneq ($(findstring -rc,$(LINUX_VERSION)),)
  44. LINUX_SITE := $(LINUX_SITE)/testing
  45. endif # -rc
  46. endif
  47. LINUX_PATCHES = $(call qstrip,$(BR2_LINUX_KERNEL_PATCH))
  48. # We rely on the generic package infrastructure to download and apply
  49. # remote patches (downloaded from ftp, http or https). For local
  50. # patches, we can't rely on that infrastructure, because there might
  51. # be directories in the patch list (unlike for other packages).
  52. LINUX_PATCH = $(filter ftp://% http://% https://%,$(LINUX_PATCHES))
  53. LINUX_INSTALL_IMAGES = YES
  54. LINUX_DEPENDENCIES += host-kmod host-lzop
  55. ifeq ($(BR2_LINUX_KERNEL_UBOOT_IMAGE),y)
  56. LINUX_DEPENDENCIES += host-uboot-tools
  57. endif
  58. LINUX_MAKE_FLAGS = \
  59. HOSTCC="$(HOSTCC)" \
  60. HOSTCFLAGS="$(HOSTCFLAGS)" \
  61. ARCH=$(KERNEL_ARCH) \
  62. INSTALL_MOD_PATH=$(TARGET_DIR) \
  63. CROSS_COMPILE="$(TARGET_CROSS)" \
  64. DEPMOD=$(HOST_DIR)/sbin/depmod
  65. LINUX_MAKE_ENV = \
  66. $(TARGET_MAKE_ENV) \
  67. BR_BINARIES_DIR=$(BINARIES_DIR)
  68. # Get the real Linux version, which tells us where kernel modules are
  69. # going to be installed in the target filesystem.
  70. LINUX_VERSION_PROBED = `$(MAKE) $(LINUX_MAKE_FLAGS) -C $(LINUX_DIR) --no-print-directory -s kernelrelease 2>/dev/null`
  71. ifeq ($(BR2_LINUX_KERNEL_USE_INTREE_DTS),y)
  72. KERNEL_DTS_NAME = $(call qstrip,$(BR2_LINUX_KERNEL_INTREE_DTS_NAME))
  73. else ifeq ($(BR2_LINUX_KERNEL_USE_CUSTOM_DTS),y)
  74. # We keep only the .dts files, so that the user can specify both .dts
  75. # and .dtsi files in BR2_LINUX_KERNEL_CUSTOM_DTS_PATH. Both will be
  76. # copied to arch/<arch>/boot/dts, but only the .dts files will
  77. # actually be generated as .dtb.
  78. KERNEL_DTS_NAME = $(basename $(filter %.dts,$(notdir $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_DTS_PATH)))))
  79. endif
  80. KERNEL_DTBS = $(addsuffix .dtb,$(KERNEL_DTS_NAME))
  81. ifeq ($(BR2_LINUX_KERNEL_IMAGE_TARGET_CUSTOM),y)
  82. LINUX_IMAGE_NAME = $(call qstrip,$(BR2_LINUX_KERNEL_IMAGE_NAME))
  83. LINUX_TARGET_NAME = $(call qstrip,$(BR2_LINUX_KERNEL_IMAGE_TARGET_NAME))
  84. ifeq ($(LINUX_IMAGE_NAME),)
  85. LINUX_IMAGE_NAME = $(LINUX_TARGET_NAME)
  86. endif
  87. else
  88. ifeq ($(BR2_LINUX_KERNEL_UIMAGE),y)
  89. LINUX_IMAGE_NAME = uImage
  90. else ifeq ($(BR2_LINUX_KERNEL_APPENDED_UIMAGE),y)
  91. LINUX_IMAGE_NAME = uImage
  92. else ifeq ($(BR2_LINUX_KERNEL_BZIMAGE),y)
  93. LINUX_IMAGE_NAME = bzImage
  94. else ifeq ($(BR2_LINUX_KERNEL_ZIMAGE),y)
  95. LINUX_IMAGE_NAME = zImage
  96. else ifeq ($(BR2_LINUX_KERNEL_ZIMAGE_EPAPR),y)
  97. LINUX_IMAGE_NAME = zImage.epapr
  98. else ifeq ($(BR2_LINUX_KERNEL_APPENDED_ZIMAGE),y)
  99. LINUX_IMAGE_NAME = zImage
  100. else ifeq ($(BR2_LINUX_KERNEL_CUIMAGE),y)
  101. LINUX_IMAGE_NAME = cuImage.$(KERNEL_DTS_NAME)
  102. else ifeq ($(BR2_LINUX_KERNEL_SIMPLEIMAGE),y)
  103. LINUX_IMAGE_NAME = simpleImage.$(KERNEL_DTS_NAME)
  104. else ifeq ($(BR2_LINUX_KERNEL_IMAGE),y)
  105. LINUX_IMAGE_NAME = Image
  106. else ifeq ($(BR2_LINUX_KERNEL_LINUX_BIN),y)
  107. LINUX_IMAGE_NAME = linux.bin
  108. else ifeq ($(BR2_LINUX_KERNEL_VMLINUX_BIN),y)
  109. LINUX_IMAGE_NAME = vmlinux.bin
  110. else ifeq ($(BR2_LINUX_KERNEL_VMLINUX),y)
  111. LINUX_IMAGE_NAME = vmlinux
  112. else ifeq ($(BR2_LINUX_KERNEL_VMLINUZ),y)
  113. LINUX_IMAGE_NAME = vmlinuz
  114. endif
  115. # The if-else blocks above are all the image types we know of, and all
  116. # come from a Kconfig choice, so we know we have LINUX_IMAGE_NAME set
  117. # to something
  118. LINUX_TARGET_NAME = $(LINUX_IMAGE_NAME)
  119. endif
  120. LINUX_KERNEL_UIMAGE_LOADADDR = $(call qstrip,$(BR2_LINUX_KERNEL_UIMAGE_LOADADDR))
  121. ifneq ($(LINUX_KERNEL_UIMAGE_LOADADDR),)
  122. LINUX_MAKE_FLAGS += LOADADDR="$(LINUX_KERNEL_UIMAGE_LOADADDR)"
  123. endif
  124. # Compute the arch path, since i386 and x86_64 are in arch/x86 and not
  125. # in arch/$(KERNEL_ARCH). Even if the kernel creates symbolic links
  126. # for bzImage, arch/i386 and arch/x86_64 do not exist when copying the
  127. # defconfig file.
  128. ifeq ($(KERNEL_ARCH),i386)
  129. KERNEL_ARCH_PATH = $(LINUX_DIR)/arch/x86
  130. else ifeq ($(KERNEL_ARCH),x86_64)
  131. KERNEL_ARCH_PATH = $(LINUX_DIR)/arch/x86
  132. else
  133. KERNEL_ARCH_PATH = $(LINUX_DIR)/arch/$(KERNEL_ARCH)
  134. endif
  135. ifeq ($(BR2_LINUX_KERNEL_VMLINUX),y)
  136. LINUX_IMAGE_PATH = $(LINUX_DIR)/$(LINUX_IMAGE_NAME)
  137. else ifeq ($(BR2_LINUX_KERNEL_VMLINUZ),y)
  138. LINUX_IMAGE_PATH = $(LINUX_DIR)/$(LINUX_IMAGE_NAME)
  139. else
  140. LINUX_IMAGE_PATH = $(KERNEL_ARCH_PATH)/boot/$(LINUX_IMAGE_NAME)
  141. endif # BR2_LINUX_KERNEL_VMLINUX
  142. define LINUX_APPLY_LOCAL_PATCHES
  143. for p in $(filter-out ftp://% http://% https://%,$(LINUX_PATCHES)) ; do \
  144. if test -d $$p ; then \
  145. $(APPLY_PATCHES) $(@D) $$p \*.patch || exit 1 ; \
  146. else \
  147. $(APPLY_PATCHES) $(@D) `dirname $$p` `basename $$p` || exit 1; \
  148. fi \
  149. done
  150. endef
  151. LINUX_POST_PATCH_HOOKS += LINUX_APPLY_LOCAL_PATCHES
  152. ifeq ($(BR2_LINUX_KERNEL_USE_DEFCONFIG),y)
  153. KERNEL_SOURCE_CONFIG = $(KERNEL_ARCH_PATH)/configs/$(call qstrip,$(BR2_LINUX_KERNEL_DEFCONFIG))_defconfig
  154. else ifeq ($(BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG),y)
  155. KERNEL_SOURCE_CONFIG = $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE))
  156. endif
  157. LINUX_KCONFIG_FILE = $(KERNEL_SOURCE_CONFIG)
  158. LINUX_KCONFIG_FRAGMENT_FILES = $(call qstrip,$(BR2_LINUX_KERNEL_CONFIG_FRAGMENT_FILES))
  159. LINUX_KCONFIG_EDITORS = menuconfig xconfig gconfig nconfig
  160. LINUX_KCONFIG_OPTS = $(LINUX_MAKE_FLAGS)
  161. define LINUX_KCONFIG_FIXUP_CMDS
  162. $(if $(LINUX_NEEDS_MODULES),
  163. $(call KCONFIG_ENABLE_OPT,CONFIG_MODULES,$(@D)/.config))
  164. $(if $(BR2_arm)$(BR2_armeb),
  165. $(call KCONFIG_ENABLE_OPT,CONFIG_AEABI,$(@D)/.config))
  166. $(if $(BR2_TARGET_ROOTFS_CPIO),
  167. $(call KCONFIG_ENABLE_OPT,CONFIG_BLK_DEV_INITRD,$(@D)/.config))
  168. # As the kernel gets compiled before root filesystems are
  169. # built, we create a fake cpio file. It'll be
  170. # replaced later by the real cpio archive, and the kernel will be
  171. # rebuilt using the linux-rebuild-with-initramfs target.
  172. $(if $(BR2_TARGET_ROOTFS_INITRAMFS),
  173. touch $(BINARIES_DIR)/rootfs.cpio
  174. $(call KCONFIG_SET_OPT,CONFIG_INITRAMFS_SOURCE,"$${BR_BINARIES_DIR}/rootfs.cpio",$(@D)/.config)
  175. $(call KCONFIG_SET_OPT,CONFIG_INITRAMFS_ROOT_UID,0,$(@D)/.config)
  176. $(call KCONFIG_SET_OPT,CONFIG_INITRAMFS_ROOT_GID,0,$(@D)/.config))
  177. $(if $(BR2_ROOTFS_DEVICE_CREATION_STATIC),,
  178. $(call KCONFIG_ENABLE_OPT,CONFIG_DEVTMPFS,$(@D)/.config)
  179. $(call KCONFIG_ENABLE_OPT,CONFIG_DEVTMPFS_MOUNT,$(@D)/.config))
  180. $(if $(BR2_ROOTFS_DEVICE_CREATION_DYNAMIC_EUDEV),
  181. $(call KCONFIG_ENABLE_OPT,CONFIG_INOTIFY_USER,$(@D)/.config))
  182. $(if $(BR2_PACKAGE_KTAP),
  183. $(call KCONFIG_ENABLE_OPT,CONFIG_DEBUG_FS,$(@D)/.config)
  184. $(call KCONFIG_ENABLE_OPT,CONFIG_ENABLE_DEFAULT_TRACERS,$(@D)/.config)
  185. $(call KCONFIG_ENABLE_OPT,CONFIG_PERF_EVENTS,$(@D)/.config)
  186. $(call KCONFIG_ENABLE_OPT,CONFIG_FUNCTION_TRACER,$(@D)/.config))
  187. $(if $(BR2_PACKAGE_SYSTEMD),
  188. $(call KCONFIG_ENABLE_OPT,CONFIG_CGROUPS,$(@D)/.config)
  189. $(call KCONFIG_ENABLE_OPT,CONFIG_INOTIFY_USER,$(@D)/.config)
  190. $(call KCONFIG_ENABLE_OPT,CONFIG_FHANDLE,$(@D)/.config)
  191. $(call KCONFIG_ENABLE_OPT,CONFIG_AUTOFS4_FS,$(@D)/.config)
  192. $(call KCONFIG_ENABLE_OPT,CONFIG_TMPFS_POSIX_ACL,$(@D)/.config)
  193. $(call KCONFIG_ENABLE_OPT,CONFIG_TMPFS_POSIX_XATTR,$(@D)/.config))
  194. $(if $(BR2_PACKAGE_SMACK),
  195. $(call KCONFIG_ENABLE_OPT,CONFIG_SECURITY,$(@D)/.config)
  196. $(call KCONFIG_ENABLE_OPT,CONFIG_SECURITY_SMACK,$(@D)/.config)
  197. $(call KCONFIG_ENABLE_OPT,CONFIG_SECURITY_NETWORK,$(@D)/.config))
  198. $(if $(BR2_PACKAGE_IPTABLES),
  199. $(call KCONFIG_ENABLE_OPT,CONFIG_IP_NF_IPTABLES,$(@D)/.config)
  200. $(call KCONFIG_ENABLE_OPT,CONFIG_IP_NF_FILTER,$(@D)/.config)
  201. $(call KCONFIG_ENABLE_OPT,CONFIG_NETFILTER,$(@D)/.config)
  202. $(call KCONFIG_ENABLE_OPT,CONFIG_NETFILTER_XTABLES,$(@D)/.config))
  203. $(if $(BR2_PACKAGE_XTABLES_ADDONS),
  204. $(call KCONFIG_ENABLE_OPT,CONFIG_NETFILTER_ADVANCED,$(@D)/.config)
  205. $(call KCONFIG_ENABLE_OPT,CONFIG_NF_CONNTRACK,$(@D)/.config)
  206. $(call KCONFIG_ENABLE_OPT,CONFIG_NF_CONNTRACK_MARK,$(@D)/.config))
  207. $(if $(BR2_LINUX_KERNEL_APPENDED_DTB),
  208. $(call KCONFIG_ENABLE_OPT,CONFIG_ARM_APPENDED_DTB,$(@D)/.config))
  209. endef
  210. ifeq ($(BR2_LINUX_KERNEL_DTS_SUPPORT),y)
  211. ifeq ($(BR2_LINUX_KERNEL_DTB_IS_SELF_BUILT),)
  212. define LINUX_BUILD_DTB
  213. $(LINUX_MAKE_ENV) $(MAKE) $(LINUX_MAKE_FLAGS) -C $(@D) $(KERNEL_DTBS)
  214. endef
  215. define LINUX_INSTALL_DTB
  216. # dtbs moved from arch/<ARCH>/boot to arch/<ARCH>/boot/dts since 3.8-rc1
  217. cp $(addprefix \
  218. $(KERNEL_ARCH_PATH)/boot/$(if $(wildcard \
  219. $(addprefix $(KERNEL_ARCH_PATH)/boot/dts/,$(KERNEL_DTBS))),dts/),$(KERNEL_DTBS)) \
  220. $(BINARIES_DIR)/
  221. endef
  222. define LINUX_INSTALL_DTB_TARGET
  223. # dtbs moved from arch/<ARCH>/boot to arch/<ARCH>/boot/dts since 3.8-rc1
  224. cp $(addprefix \
  225. $(KERNEL_ARCH_PATH)/boot/$(if $(wildcard \
  226. $(addprefix $(KERNEL_ARCH_PATH)/boot/dts/,$(KERNEL_DTBS))),dts/),$(KERNEL_DTBS)) \
  227. $(TARGET_DIR)/boot/
  228. endef
  229. endif
  230. endif
  231. ifeq ($(BR2_LINUX_KERNEL_APPENDED_DTB),y)
  232. # dtbs moved from arch/$ARCH/boot to arch/$ARCH/boot/dts since 3.8-rc1
  233. define LINUX_APPEND_DTB
  234. if [ -e $(KERNEL_ARCH_PATH)/boot/$(KERNEL_DTS_NAME).dtb ]; then \
  235. cat $(KERNEL_ARCH_PATH)/boot/$(KERNEL_DTS_NAME).dtb; \
  236. else \
  237. cat $(KERNEL_ARCH_PATH)/boot/dts/$(KERNEL_DTS_NAME).dtb; \
  238. fi >> $(KERNEL_ARCH_PATH)/boot/zImage
  239. endef
  240. ifeq ($(BR2_LINUX_KERNEL_APPENDED_UIMAGE),y)
  241. # We need to generate a new u-boot image that takes into
  242. # account the extra-size added by the device tree at the end
  243. # of the image. To do so, we first need to retrieve both load
  244. # address and entry point for the kernel from the already
  245. # generate uboot image before using mkimage -l.
  246. LINUX_APPEND_DTB += $(sep) MKIMAGE_ARGS=`$(MKIMAGE) -l $(LINUX_IMAGE_PATH) |\
  247. sed -n -e 's/Image Name:[ ]*\(.*\)/-n \1/p' -e 's/Load Address:/-a/p' -e 's/Entry Point:/-e/p'`; \
  248. $(MKIMAGE) -A $(MKIMAGE_ARCH) -O linux \
  249. -T kernel -C none $${MKIMAGE_ARGS} \
  250. -d $(KERNEL_ARCH_PATH)/boot/zImage $(LINUX_IMAGE_PATH);
  251. endif
  252. endif
  253. # Compilation. We make sure the kernel gets rebuilt when the
  254. # configuration has changed.
  255. define LINUX_BUILD_CMDS
  256. $(if $(BR2_LINUX_KERNEL_USE_CUSTOM_DTS),
  257. cp $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_DTS_PATH)) $(KERNEL_ARCH_PATH)/boot/dts/)
  258. $(LINUX_MAKE_ENV) $(MAKE) $(LINUX_MAKE_FLAGS) -C $(@D) $(LINUX_TARGET_NAME)
  259. @if grep -q "CONFIG_MODULES=y" $(@D)/.config; then \
  260. $(LINUX_MAKE_ENV) $(MAKE) $(LINUX_MAKE_FLAGS) -C $(@D) modules ; \
  261. fi
  262. $(LINUX_BUILD_DTB)
  263. $(LINUX_APPEND_DTB)
  264. endef
  265. ifeq ($(BR2_LINUX_KERNEL_INSTALL_TARGET),y)
  266. define LINUX_INSTALL_KERNEL_IMAGE_TO_TARGET
  267. install -m 0644 -D $(LINUX_IMAGE_PATH) $(TARGET_DIR)/boot/$(LINUX_IMAGE_NAME)
  268. $(LINUX_INSTALL_DTB_TARGET)
  269. endef
  270. endif
  271. define LINUX_INSTALL_HOST_TOOLS
  272. # Installing dtc (device tree compiler) as host tool, if selected
  273. if grep -q "CONFIG_DTC=y" $(@D)/.config; then \
  274. $(INSTALL) -D -m 0755 $(@D)/scripts/dtc/dtc $(HOST_DIR)/usr/bin/linux-dtc ; \
  275. fi
  276. endef
  277. define LINUX_INSTALL_IMAGES_CMDS
  278. cp $(LINUX_IMAGE_PATH) $(BINARIES_DIR)
  279. $(LINUX_INSTALL_DTB)
  280. endef
  281. define LINUX_INSTALL_TARGET_CMDS
  282. $(LINUX_INSTALL_KERNEL_IMAGE_TO_TARGET)
  283. # Install modules and remove symbolic links pointing to build
  284. # directories, not relevant on the target
  285. @if grep -q "CONFIG_MODULES=y" $(@D)/.config; then \
  286. $(LINUX_MAKE_ENV) $(MAKE1) $(LINUX_MAKE_FLAGS) -C $(@D) modules_install; \
  287. rm -f $(TARGET_DIR)/lib/modules/$(LINUX_VERSION_PROBED)/build ; \
  288. rm -f $(TARGET_DIR)/lib/modules/$(LINUX_VERSION_PROBED)/source ; \
  289. fi
  290. $(LINUX_INSTALL_HOST_TOOLS)
  291. endef
  292. # Include all our extensions and tools definitions.
  293. #
  294. # Note: our package infrastructure uses the full-path of the last-scanned
  295. # Makefile to determine what package we're currently defining, using the
  296. # last directory component in the path. As such, including other Makefile,
  297. # like below, before we call one of the *-package macro is usally not
  298. # working.
  299. # However, since the files we include here are in the same directory as
  300. # the current Makefile, we are OK. But this is a hard requirement: files
  301. # included here *must* be in the same directory!
  302. include $(sort $(wildcard linux/linux-ext-*.mk))
  303. include $(sort $(wildcard linux/linux-tool-*.mk))
  304. LINUX_PATCH_DEPENDENCIES += $(foreach ext,$(LINUX_EXTENSIONS),\
  305. $(if $(BR2_LINUX_KERNEL_EXT_$(call UPPERCASE,$(ext))),$(ext)))
  306. LINUX_PRE_PATCH_HOOKS += $(foreach ext,$(LINUX_EXTENSIONS),\
  307. $(if $(BR2_LINUX_KERNEL_EXT_$(call UPPERCASE,$(ext))),\
  308. $(call UPPERCASE,$(ext))_PREPARE_KERNEL))
  309. # Install Linux kernel tools in the staging directory since some tools
  310. # may install shared libraries and headers (e.g. cpupower). The kernel
  311. # image is NOT installed in the staging directory.
  312. LINUX_INSTALL_STAGING = YES
  313. LINUX_DEPENDENCIES += $(foreach tool,$(LINUX_TOOLS),\
  314. $(if $(BR2_LINUX_KERNEL_TOOL_$(call UPPERCASE,$(tool))),\
  315. $($(call UPPERCASE,$(tool))_DEPENDENCIES)))
  316. LINUX_POST_BUILD_HOOKS += $(foreach tool,$(LINUX_TOOLS),\
  317. $(if $(BR2_LINUX_KERNEL_TOOL_$(call UPPERCASE,$(tool))),\
  318. $(call UPPERCASE,$(tool))_BUILD_CMDS))
  319. LINUX_POST_INSTALL_STAGING_HOOKS += $(foreach tool,$(LINUX_TOOLS),\
  320. $(if $(BR2_LINUX_KERNEL_TOOL_$(call UPPERCASE,$(tool))),\
  321. $(call UPPERCASE,$(tool))_INSTALL_STAGING_CMDS))
  322. LINUX_POST_INSTALL_TARGET_HOOKS += $(foreach tool,$(LINUX_TOOLS),\
  323. $(if $(BR2_LINUX_KERNEL_TOOL_$(call UPPERCASE,$(tool))),\
  324. $(call UPPERCASE,$(tool))_INSTALL_TARGET_CMDS))
  325. # Checks to give errors that the user can understand
  326. ifeq ($(BR_BUILDING),y)
  327. ifeq ($(BR2_LINUX_KERNEL_USE_DEFCONFIG),y)
  328. ifeq ($(call qstrip,$(BR2_LINUX_KERNEL_DEFCONFIG)),)
  329. $(error No kernel defconfig name specified, check your BR2_LINUX_KERNEL_DEFCONFIG setting)
  330. endif
  331. endif
  332. ifeq ($(BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG),y)
  333. ifeq ($(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE)),)
  334. $(error No kernel configuration file specified, check your BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE setting)
  335. endif
  336. endif
  337. ifeq ($(BR2_LINUX_KERNEL_DTS_SUPPORT)$(KERNEL_DTS_NAME),y)
  338. $(error No kernel device tree source specified, check your \
  339. BR2_LINUX_KERNEL_USE_INTREE_DTS / BR2_LINUX_KERNEL_USE_CUSTOM_DTS settings)
  340. endif
  341. ifeq ($(BR2_LINUX_KERNEL_APPENDED_DTB),y)
  342. ifneq ($(words $(KERNEL_DTS_NAME)),1)
  343. $(error Kernel with appended device tree needs exactly one DTS source. \
  344. Check BR2_LINUX_KERNEL_INTREE_DTS_NAME or BR2_LINUX_KERNEL_CUSTOM_DTS_PATH.)
  345. endif
  346. endif
  347. endif # BR_BUILDING
  348. $(eval $(kconfig-package))
  349. # Support for rebuilding the kernel after the cpio archive has
  350. # been generated in $(BINARIES_DIR)/rootfs.cpio.
  351. $(LINUX_DIR)/.stamp_initramfs_rebuilt: $(LINUX_DIR)/.stamp_target_installed $(LINUX_DIR)/.stamp_images_installed $(BINARIES_DIR)/rootfs.cpio
  352. @$(call MESSAGE,"Rebuilding kernel with initramfs")
  353. # Build the kernel.
  354. $(LINUX_MAKE_ENV) $(MAKE) $(LINUX_MAKE_FLAGS) -C $(@D) $(LINUX_TARGET_NAME)
  355. $(LINUX_APPEND_DTB)
  356. # Copy the kernel image to its final destination
  357. cp $(LINUX_IMAGE_PATH) $(BINARIES_DIR)
  358. # If there is a .ub file copy it to the final destination
  359. test ! -f $(LINUX_IMAGE_PATH).ub || cp $(LINUX_IMAGE_PATH).ub $(BINARIES_DIR)
  360. $(Q)touch $@
  361. # The initramfs building code must make sure this target gets called
  362. # after it generated the initramfs list of files.
  363. linux-rebuild-with-initramfs: $(LINUX_DIR)/.stamp_initramfs_rebuilt