linux.mk 18 KB

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  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. define LINUX_HELP_CMDS
  10. @echo ' linux-menuconfig - Run Linux kernel menuconfig'
  11. @echo ' linux-savedefconfig - Run Linux kernel savedefconfig'
  12. @echo ' linux-update-defconfig - Save the Linux configuration to the path specified'
  13. @echo ' by BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE'
  14. endef
  15. # Compute LINUX_SOURCE and LINUX_SITE from the configuration
  16. ifeq ($(BR2_LINUX_KERNEL_CUSTOM_TARBALL),y)
  17. LINUX_TARBALL = $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_TARBALL_LOCATION))
  18. LINUX_SITE = $(patsubst %/,%,$(dir $(LINUX_TARBALL)))
  19. LINUX_SOURCE = $(notdir $(LINUX_TARBALL))
  20. BR_NO_CHECK_HASH_FOR += $(LINUX_SOURCE)
  21. else ifeq ($(BR2_LINUX_KERNEL_CUSTOM_GIT),y)
  22. LINUX_SITE = $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_REPO_URL))
  23. LINUX_SITE_METHOD = git
  24. else ifeq ($(BR2_LINUX_KERNEL_CUSTOM_HG),y)
  25. LINUX_SITE = $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_REPO_URL))
  26. LINUX_SITE_METHOD = hg
  27. else ifeq ($(BR2_LINUX_KERNEL_CUSTOM_SVN),y)
  28. LINUX_SITE = $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_REPO_URL))
  29. LINUX_SITE_METHOD = svn
  30. else
  31. LINUX_SOURCE = linux-$(LINUX_VERSION).tar.xz
  32. ifeq ($(BR2_LINUX_KERNEL_CUSTOM_VERSION),y)
  33. BR_NO_CHECK_HASH_FOR += $(LINUX_SOURCE)
  34. endif
  35. # In X.Y.Z, get X and Y. We replace dots and dashes by spaces in order
  36. # to use the $(word) function. We support versions such as 4.0, 3.1,
  37. # 2.6.32, 2.6.32-rc1, 3.0-rc6, etc.
  38. ifeq ($(findstring x2.6.,x$(LINUX_VERSION)),x2.6.)
  39. LINUX_SITE = $(BR2_KERNEL_MIRROR)/linux/kernel/v2.6
  40. else ifeq ($(findstring x3.,x$(LINUX_VERSION)),x3.)
  41. LINUX_SITE = $(BR2_KERNEL_MIRROR)/linux/kernel/v3.x
  42. else ifeq ($(findstring x4.,x$(LINUX_VERSION)),x4.)
  43. LINUX_SITE = $(BR2_KERNEL_MIRROR)/linux/kernel/v4.x
  44. endif
  45. # release candidates are in testing/ subdir
  46. ifneq ($(findstring -rc,$(LINUX_VERSION)),)
  47. LINUX_SITE := $(LINUX_SITE)/testing
  48. endif # -rc
  49. endif
  50. LINUX_PATCHES = $(call qstrip,$(BR2_LINUX_KERNEL_PATCH))
  51. # We rely on the generic package infrastructure to download and apply
  52. # remote patches (downloaded from ftp, http or https). For local
  53. # patches, we can't rely on that infrastructure, because there might
  54. # be directories in the patch list (unlike for other packages).
  55. LINUX_PATCH = $(filter ftp://% http://% https://%,$(LINUX_PATCHES))
  56. LINUX_INSTALL_IMAGES = YES
  57. LINUX_DEPENDENCIES += host-kmod
  58. # host tools needed for kernel compression
  59. ifeq ($(BR2_LINUX_KERNEL_LZ4),y)
  60. LINUX_DEPENDENCIES += host-lz4
  61. else ifeq ($(BR2_LINUX_KERNEL_LZMA),y)
  62. LINUX_DEPENDENCIES += host-lzma
  63. else ifeq ($(BR2_LINUX_KERNEL_LZO),y)
  64. LINUX_DEPENDENCIES += host-lzop
  65. else ifeq ($(BR2_LINUX_KERNEL_XZ),y)
  66. LINUX_DEPENDENCIES += host-xz
  67. endif
  68. LINUX_COMPRESSION_OPT_$(BR2_LINUX_KERNEL_GZIP) = CONFIG_KERNEL_GZIP
  69. LINUX_COMPRESSION_OPT_$(BR2_LINUX_KERNEL_LZ4) = CONFIG_KERNEL_LZ4
  70. LINUX_COMPRESSION_OPT_$(BR2_LINUX_KERNEL_LZMA) = CONFIG_KERNEL_LZMA
  71. LINUX_COMPRESSION_OPT_$(BR2_LINUX_KERNEL_LZO) = CONFIG_KERNEL_LZO
  72. LINUX_COMPRESSION_OPT_$(BR2_LINUX_KERNEL_XZ) = CONFIG_KERNEL_XZ
  73. ifeq ($(BR2_LINUX_KERNEL_UBOOT_IMAGE),y)
  74. LINUX_DEPENDENCIES += host-uboot-tools
  75. endif
  76. LINUX_MAKE_FLAGS = \
  77. HOSTCC="$(HOSTCC)" \
  78. HOSTCFLAGS="$(HOSTCFLAGS)" \
  79. ARCH=$(KERNEL_ARCH) \
  80. INSTALL_MOD_PATH=$(TARGET_DIR) \
  81. CROSS_COMPILE="$(TARGET_CROSS)" \
  82. DEPMOD=$(HOST_DIR)/sbin/depmod
  83. LINUX_MAKE_ENV = \
  84. $(TARGET_MAKE_ENV) \
  85. BR_BINARIES_DIR=$(BINARIES_DIR)
  86. # Get the real Linux version, which tells us where kernel modules are
  87. # going to be installed in the target filesystem.
  88. LINUX_VERSION_PROBED = `$(MAKE) $(LINUX_MAKE_FLAGS) -C $(LINUX_DIR) --no-print-directory -s kernelrelease 2>/dev/null`
  89. ifeq ($(BR2_LINUX_KERNEL_USE_INTREE_DTS),y)
  90. KERNEL_DTS_NAME = $(call qstrip,$(BR2_LINUX_KERNEL_INTREE_DTS_NAME))
  91. else ifeq ($(BR2_LINUX_KERNEL_USE_CUSTOM_DTS),y)
  92. # We keep only the .dts files, so that the user can specify both .dts
  93. # and .dtsi files in BR2_LINUX_KERNEL_CUSTOM_DTS_PATH. Both will be
  94. # copied to arch/<arch>/boot/dts, but only the .dts files will
  95. # actually be generated as .dtb.
  96. KERNEL_DTS_NAME = $(basename $(filter %.dts,$(notdir $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_DTS_PATH)))))
  97. endif
  98. KERNEL_DTBS = $(addsuffix .dtb,$(KERNEL_DTS_NAME))
  99. ifeq ($(BR2_LINUX_KERNEL_IMAGE_TARGET_CUSTOM),y)
  100. LINUX_IMAGE_NAME = $(call qstrip,$(BR2_LINUX_KERNEL_IMAGE_NAME))
  101. LINUX_TARGET_NAME = $(call qstrip,$(BR2_LINUX_KERNEL_IMAGE_TARGET_NAME))
  102. ifeq ($(LINUX_IMAGE_NAME),)
  103. LINUX_IMAGE_NAME = $(LINUX_TARGET_NAME)
  104. endif
  105. else
  106. ifeq ($(BR2_LINUX_KERNEL_UIMAGE),y)
  107. LINUX_IMAGE_NAME = uImage
  108. else ifeq ($(BR2_LINUX_KERNEL_APPENDED_UIMAGE),y)
  109. LINUX_IMAGE_NAME = uImage
  110. else ifeq ($(BR2_LINUX_KERNEL_BZIMAGE),y)
  111. LINUX_IMAGE_NAME = bzImage
  112. else ifeq ($(BR2_LINUX_KERNEL_ZIMAGE),y)
  113. LINUX_IMAGE_NAME = zImage
  114. else ifeq ($(BR2_LINUX_KERNEL_ZIMAGE_EPAPR),y)
  115. LINUX_IMAGE_NAME = zImage.epapr
  116. else ifeq ($(BR2_LINUX_KERNEL_APPENDED_ZIMAGE),y)
  117. LINUX_IMAGE_NAME = zImage
  118. else ifeq ($(BR2_LINUX_KERNEL_CUIMAGE),y)
  119. LINUX_IMAGE_NAME = cuImage.$(KERNEL_DTS_NAME)
  120. else ifeq ($(BR2_LINUX_KERNEL_SIMPLEIMAGE),y)
  121. LINUX_IMAGE_NAME = simpleImage.$(KERNEL_DTS_NAME)
  122. else ifeq ($(BR2_LINUX_KERNEL_IMAGE),y)
  123. LINUX_IMAGE_NAME = Image
  124. else ifeq ($(BR2_LINUX_KERNEL_LINUX_BIN),y)
  125. LINUX_IMAGE_NAME = linux.bin
  126. else ifeq ($(BR2_LINUX_KERNEL_VMLINUX_BIN),y)
  127. LINUX_IMAGE_NAME = vmlinux.bin
  128. else ifeq ($(BR2_LINUX_KERNEL_VMLINUX),y)
  129. LINUX_IMAGE_NAME = vmlinux
  130. else ifeq ($(BR2_LINUX_KERNEL_VMLINUZ),y)
  131. LINUX_IMAGE_NAME = vmlinuz
  132. else ifeq ($(BR2_LINUX_KERNEL_VMLINUZ_BIN),y)
  133. LINUX_IMAGE_NAME = vmlinuz.bin
  134. endif
  135. # The if-else blocks above are all the image types we know of, and all
  136. # come from a Kconfig choice, so we know we have LINUX_IMAGE_NAME set
  137. # to something
  138. LINUX_TARGET_NAME = $(LINUX_IMAGE_NAME)
  139. endif
  140. LINUX_KERNEL_UIMAGE_LOADADDR = $(call qstrip,$(BR2_LINUX_KERNEL_UIMAGE_LOADADDR))
  141. ifneq ($(LINUX_KERNEL_UIMAGE_LOADADDR),)
  142. LINUX_MAKE_FLAGS += LOADADDR="$(LINUX_KERNEL_UIMAGE_LOADADDR)"
  143. endif
  144. # Compute the arch path, since i386 and x86_64 are in arch/x86 and not
  145. # in arch/$(KERNEL_ARCH). Even if the kernel creates symbolic links
  146. # for bzImage, arch/i386 and arch/x86_64 do not exist when copying the
  147. # defconfig file.
  148. ifeq ($(KERNEL_ARCH),i386)
  149. KERNEL_ARCH_PATH = $(LINUX_DIR)/arch/x86
  150. else ifeq ($(KERNEL_ARCH),x86_64)
  151. KERNEL_ARCH_PATH = $(LINUX_DIR)/arch/x86
  152. else
  153. KERNEL_ARCH_PATH = $(LINUX_DIR)/arch/$(KERNEL_ARCH)
  154. endif
  155. ifeq ($(BR2_LINUX_KERNEL_VMLINUX),y)
  156. LINUX_IMAGE_PATH = $(LINUX_DIR)/$(LINUX_IMAGE_NAME)
  157. else ifeq ($(BR2_LINUX_KERNEL_VMLINUZ),y)
  158. LINUX_IMAGE_PATH = $(LINUX_DIR)/$(LINUX_IMAGE_NAME)
  159. else ifeq ($(BR2_LINUX_KERNEL_VMLINUZ_BIN),y)
  160. LINUX_IMAGE_PATH = $(LINUX_DIR)/$(LINUX_IMAGE_NAME)
  161. else
  162. LINUX_IMAGE_PATH = $(KERNEL_ARCH_PATH)/boot/$(LINUX_IMAGE_NAME)
  163. endif # BR2_LINUX_KERNEL_VMLINUX
  164. define LINUX_APPLY_LOCAL_PATCHES
  165. for p in $(filter-out ftp://% http://% https://%,$(LINUX_PATCHES)) ; do \
  166. if test -d $$p ; then \
  167. $(APPLY_PATCHES) $(@D) $$p \*.patch || exit 1 ; \
  168. else \
  169. $(APPLY_PATCHES) $(@D) `dirname $$p` `basename $$p` || exit 1; \
  170. fi \
  171. done
  172. endef
  173. LINUX_POST_PATCH_HOOKS += LINUX_APPLY_LOCAL_PATCHES
  174. # Older linux kernels use deprecated perl constructs in timeconst.pl
  175. # that were removed for perl 5.22+ so it breaks on newer distributions
  176. # Try a dry-run patch to see if this applies, if it does go ahead
  177. define LINUX_TRY_PATCH_TIMECONST
  178. @if patch -p1 --dry-run -f -s -d $(@D) <$(LINUX_PKGDIR)/0001-timeconst.pl-Eliminate-Perl-warning.patch.conditional >/dev/null ; then \
  179. $(APPLY_PATCHES) $(@D) $(LINUX_PKGDIR) 0001-timeconst.pl-Eliminate-Perl-warning.patch.conditional ; \
  180. fi
  181. endef
  182. LINUX_POST_PATCH_HOOKS += LINUX_TRY_PATCH_TIMECONST
  183. ifeq ($(BR2_LINUX_KERNEL_USE_DEFCONFIG),y)
  184. LINUX_KCONFIG_DEFCONFIG = $(call qstrip,$(BR2_LINUX_KERNEL_DEFCONFIG))_defconfig
  185. else ifeq ($(BR2_LINUX_KERNEL_USE_ARCH_DEFAULT_CONFIG),y)
  186. LINUX_KCONFIG_DEFCONFIG = defconfig
  187. else ifeq ($(BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG),y)
  188. LINUX_KCONFIG_FILE = $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE))
  189. endif
  190. LINUX_KCONFIG_FRAGMENT_FILES = $(call qstrip,$(BR2_LINUX_KERNEL_CONFIG_FRAGMENT_FILES))
  191. LINUX_KCONFIG_EDITORS = menuconfig xconfig gconfig nconfig
  192. LINUX_KCONFIG_OPTS = $(LINUX_MAKE_FLAGS)
  193. # If no package has yet set it, set it from the Kconfig option
  194. LINUX_NEEDS_MODULES ?= $(BR2_LINUX_NEEDS_MODULES)
  195. # Make sure the Linux kernel is built with the right endianness. Not
  196. # all architectures support
  197. # CONFIG_CPU_BIG_ENDIAN/CONFIG_CPU_LITTLE_ENDIAN in Linux, but the
  198. # option will be thrown away and ignored if it doesn't exist.
  199. ifeq ($(BR2_ENDIAN),"BIG")
  200. define LINUX_FIXUP_CONFIG_ENDIANNESS
  201. $(call KCONFIG_ENABLE_OPT,CONFIG_CPU_BIG_ENDIAN,$(@D)/.config)
  202. endef
  203. else
  204. define LINUX_FIXUP_CONFIG_ENDIANNESS
  205. $(call KCONFIG_ENABLE_OPT,CONFIG_CPU_LITTLE_ENDIAN,$(@D)/.config)
  206. endef
  207. endif
  208. define LINUX_KCONFIG_FIXUP_CMDS
  209. $(if $(LINUX_NEEDS_MODULES),
  210. $(call KCONFIG_ENABLE_OPT,CONFIG_MODULES,$(@D)/.config))
  211. $(call KCONFIG_ENABLE_OPT,$(LINUX_COMPRESSION_OPT_y),$(@D)/.config)
  212. $(foreach opt, $(LINUX_COMPRESSION_OPT_),
  213. $(call KCONFIG_DISABLE_OPT,$(opt),$(@D)/.config)
  214. )
  215. $(LINUX_FIXUP_CONFIG_ENDIANNESS)
  216. $(if $(BR2_arm)$(BR2_armeb),
  217. $(call KCONFIG_ENABLE_OPT,CONFIG_AEABI,$(@D)/.config))
  218. $(if $(BR2_TARGET_ROOTFS_CPIO),
  219. $(call KCONFIG_ENABLE_OPT,CONFIG_BLK_DEV_INITRD,$(@D)/.config))
  220. # As the kernel gets compiled before root filesystems are
  221. # built, we create a fake cpio file. It'll be
  222. # replaced later by the real cpio archive, and the kernel will be
  223. # rebuilt using the linux-rebuild-with-initramfs target.
  224. $(if $(BR2_TARGET_ROOTFS_INITRAMFS),
  225. touch $(BINARIES_DIR)/rootfs.cpio
  226. $(call KCONFIG_SET_OPT,CONFIG_INITRAMFS_SOURCE,"$${BR_BINARIES_DIR}/rootfs.cpio",$(@D)/.config)
  227. $(call KCONFIG_SET_OPT,CONFIG_INITRAMFS_ROOT_UID,0,$(@D)/.config)
  228. $(call KCONFIG_SET_OPT,CONFIG_INITRAMFS_ROOT_GID,0,$(@D)/.config))
  229. $(if $(BR2_ROOTFS_DEVICE_CREATION_STATIC),,
  230. $(call KCONFIG_ENABLE_OPT,CONFIG_DEVTMPFS,$(@D)/.config)
  231. $(call KCONFIG_ENABLE_OPT,CONFIG_DEVTMPFS_MOUNT,$(@D)/.config))
  232. $(if $(BR2_ROOTFS_DEVICE_CREATION_DYNAMIC_EUDEV),
  233. $(call KCONFIG_ENABLE_OPT,CONFIG_INOTIFY_USER,$(@D)/.config))
  234. $(if $(BR2_PACKAGE_KTAP),
  235. $(call KCONFIG_ENABLE_OPT,CONFIG_DEBUG_FS,$(@D)/.config)
  236. $(call KCONFIG_ENABLE_OPT,CONFIG_ENABLE_DEFAULT_TRACERS,$(@D)/.config)
  237. $(call KCONFIG_ENABLE_OPT,CONFIG_PERF_EVENTS,$(@D)/.config)
  238. $(call KCONFIG_ENABLE_OPT,CONFIG_FUNCTION_TRACER,$(@D)/.config))
  239. $(if $(BR2_PACKAGE_SYSTEMD),
  240. $(call KCONFIG_ENABLE_OPT,CONFIG_CGROUPS,$(@D)/.config)
  241. $(call KCONFIG_ENABLE_OPT,CONFIG_INOTIFY_USER,$(@D)/.config)
  242. $(call KCONFIG_ENABLE_OPT,CONFIG_FHANDLE,$(@D)/.config)
  243. $(call KCONFIG_ENABLE_OPT,CONFIG_AUTOFS4_FS,$(@D)/.config)
  244. $(call KCONFIG_ENABLE_OPT,CONFIG_TMPFS_POSIX_ACL,$(@D)/.config)
  245. $(call KCONFIG_ENABLE_OPT,CONFIG_TMPFS_POSIX_XATTR,$(@D)/.config))
  246. $(if $(BR2_PACKAGE_SMACK),
  247. $(call KCONFIG_ENABLE_OPT,CONFIG_SECURITY,$(@D)/.config)
  248. $(call KCONFIG_ENABLE_OPT,CONFIG_SECURITY_SMACK,$(@D)/.config)
  249. $(call KCONFIG_ENABLE_OPT,CONFIG_SECURITY_NETWORK,$(@D)/.config))
  250. $(if $(BR2_PACKAGE_IPTABLES),
  251. $(call KCONFIG_ENABLE_OPT,CONFIG_IP_NF_IPTABLES,$(@D)/.config)
  252. $(call KCONFIG_ENABLE_OPT,CONFIG_IP_NF_FILTER,$(@D)/.config)
  253. $(call KCONFIG_ENABLE_OPT,CONFIG_NETFILTER,$(@D)/.config)
  254. $(call KCONFIG_ENABLE_OPT,CONFIG_NETFILTER_XTABLES,$(@D)/.config))
  255. $(if $(BR2_PACKAGE_XTABLES_ADDONS),
  256. $(call KCONFIG_ENABLE_OPT,CONFIG_NETFILTER_ADVANCED,$(@D)/.config)
  257. $(call KCONFIG_ENABLE_OPT,CONFIG_NF_CONNTRACK,$(@D)/.config)
  258. $(call KCONFIG_ENABLE_OPT,CONFIG_NF_CONNTRACK_MARK,$(@D)/.config))
  259. $(if $(BR2_LINUX_KERNEL_APPENDED_DTB),
  260. $(call KCONFIG_ENABLE_OPT,CONFIG_ARM_APPENDED_DTB,$(@D)/.config))
  261. $(if $(BR2_PACKAGE_KERNEL_MODULE_IMX_GPU_VIV),
  262. $(call KCONFIG_DISABLE_OPT,CONFIG_MXC_GPU_VIV,$(@D)/.config))
  263. endef
  264. ifeq ($(BR2_LINUX_KERNEL_DTS_SUPPORT),y)
  265. ifeq ($(BR2_LINUX_KERNEL_DTB_IS_SELF_BUILT),)
  266. define LINUX_BUILD_DTB
  267. $(LINUX_MAKE_ENV) $(MAKE) $(LINUX_MAKE_FLAGS) -C $(@D) $(KERNEL_DTBS)
  268. endef
  269. ifeq ($(BR2_LINUX_KERNEL_APPENDED_DTB),)
  270. define LINUX_INSTALL_DTB
  271. # dtbs moved from arch/<ARCH>/boot to arch/<ARCH>/boot/dts since 3.8-rc1
  272. cp $(addprefix \
  273. $(KERNEL_ARCH_PATH)/boot/$(if $(wildcard \
  274. $(addprefix $(KERNEL_ARCH_PATH)/boot/dts/,$(KERNEL_DTBS))),dts/),$(KERNEL_DTBS)) \
  275. $(1)
  276. endef
  277. endif # BR2_LINUX_KERNEL_APPENDED_DTB
  278. endif # BR2_LINUX_KERNEL_DTB_IS_SELF_BUILT
  279. endif # BR2_LINUX_KERNEL_DTS_SUPPORT
  280. ifeq ($(BR2_LINUX_KERNEL_APPENDED_DTB),y)
  281. # dtbs moved from arch/$ARCH/boot to arch/$ARCH/boot/dts since 3.8-rc1
  282. define LINUX_APPEND_DTB
  283. (cd $(KERNEL_ARCH_PATH)/boot; \
  284. for dtb in $(KERNEL_DTS_NAME); do \
  285. if test -e $${dtb}.dtb ; then \
  286. dtbpath=$${dtb}.dtb ; \
  287. else \
  288. dtbpath=dts/$${dtb}.dtb ; \
  289. fi ; \
  290. cat zImage $${dtbpath} > zImage.$${dtb} || exit 1; \
  291. done)
  292. endef
  293. ifeq ($(BR2_LINUX_KERNEL_APPENDED_UIMAGE),y)
  294. # We need to generate a new u-boot image that takes into
  295. # account the extra-size added by the device tree at the end
  296. # of the image. To do so, we first need to retrieve both load
  297. # address and entry point for the kernel from the already
  298. # generate uboot image before using mkimage -l.
  299. LINUX_APPEND_DTB += ; \
  300. MKIMAGE_ARGS=`$(MKIMAGE) -l $(LINUX_IMAGE_PATH) |\
  301. sed -n -e 's/Image Name:[ ]*\(.*\)/-n \1/p' -e 's/Load Address:/-a/p' -e 's/Entry Point:/-e/p'`; \
  302. for dtb in $(KERNEL_DTS_NAME); do \
  303. $(MKIMAGE) -A $(MKIMAGE_ARCH) -O linux \
  304. -T kernel -C none $${MKIMAGE_ARGS} \
  305. -d $(KERNEL_ARCH_PATH)/boot/zImage.$${dtb} $(LINUX_IMAGE_PATH).$${dtb}; \
  306. done
  307. endif
  308. endif
  309. # Compilation. We make sure the kernel gets rebuilt when the
  310. # configuration has changed.
  311. define LINUX_BUILD_CMDS
  312. $(if $(BR2_LINUX_KERNEL_USE_CUSTOM_DTS),
  313. cp -f $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_DTS_PATH)) $(KERNEL_ARCH_PATH)/boot/dts/)
  314. $(LINUX_MAKE_ENV) $(MAKE) $(LINUX_MAKE_FLAGS) -C $(@D) $(LINUX_TARGET_NAME)
  315. @if grep -q "CONFIG_MODULES=y" $(@D)/.config; then \
  316. $(LINUX_MAKE_ENV) $(MAKE) $(LINUX_MAKE_FLAGS) -C $(@D) modules ; \
  317. fi
  318. $(LINUX_BUILD_DTB)
  319. $(LINUX_APPEND_DTB)
  320. endef
  321. ifeq ($(BR2_LINUX_KERNEL_APPENDED_DTB),y)
  322. # When a DTB was appended, install the potential several images with
  323. # appended DTBs.
  324. define LINUX_INSTALL_IMAGE
  325. mkdir -p $(1)
  326. cp $(KERNEL_ARCH_PATH)/boot/$(LINUX_IMAGE_NAME).* $(1)
  327. endef
  328. else
  329. # Otherwise, just install the unique image generated by the kernel
  330. # build process.
  331. define LINUX_INSTALL_IMAGE
  332. $(INSTALL) -m 0644 -D $(LINUX_IMAGE_PATH) $(1)/$(LINUX_IMAGE_NAME)
  333. endef
  334. endif
  335. ifeq ($(BR2_LINUX_KERNEL_INSTALL_TARGET),y)
  336. define LINUX_INSTALL_KERNEL_IMAGE_TO_TARGET
  337. $(call LINUX_INSTALL_IMAGE,$(TARGET_DIR)/boot)
  338. $(call LINUX_INSTALL_DTB,$(TARGET_DIR)/boot)
  339. endef
  340. endif
  341. define LINUX_INSTALL_HOST_TOOLS
  342. # Installing dtc (device tree compiler) as host tool, if selected
  343. if grep -q "CONFIG_DTC=y" $(@D)/.config; then \
  344. $(INSTALL) -D -m 0755 $(@D)/scripts/dtc/dtc $(HOST_DIR)/usr/bin/linux-dtc ; \
  345. if [ ! -e $(HOST_DIR)/usr/bin/dtc ]; then \
  346. ln -sf linux-dtc $(HOST_DIR)/usr/bin/dtc ; \
  347. fi \
  348. fi
  349. endef
  350. define LINUX_INSTALL_IMAGES_CMDS
  351. $(call LINUX_INSTALL_IMAGE,$(BINARIES_DIR))
  352. $(call LINUX_INSTALL_DTB,$(BINARIES_DIR))
  353. endef
  354. ifeq ($(BR2_STRIP_strip),y)
  355. LINUX_MAKE_FLAGS += INSTALL_MOD_STRIP=1
  356. endif
  357. define LINUX_INSTALL_TARGET_CMDS
  358. $(LINUX_INSTALL_KERNEL_IMAGE_TO_TARGET)
  359. # Install modules and remove symbolic links pointing to build
  360. # directories, not relevant on the target
  361. @if grep -q "CONFIG_MODULES=y" $(@D)/.config; then \
  362. $(LINUX_MAKE_ENV) $(MAKE1) $(LINUX_MAKE_FLAGS) -C $(@D) modules_install; \
  363. rm -f $(TARGET_DIR)/lib/modules/$(LINUX_VERSION_PROBED)/build ; \
  364. rm -f $(TARGET_DIR)/lib/modules/$(LINUX_VERSION_PROBED)/source ; \
  365. fi
  366. $(LINUX_INSTALL_HOST_TOOLS)
  367. endef
  368. # Include all our extensions.
  369. #
  370. # Note: our package infrastructure uses the full-path of the last-scanned
  371. # Makefile to determine what package we're currently defining, using the
  372. # last directory component in the path. As such, including other Makefile,
  373. # like below, before we call one of the *-package macro is usally not
  374. # working.
  375. # However, since the files we include here are in the same directory as
  376. # the current Makefile, we are OK. But this is a hard requirement: files
  377. # included here *must* be in the same directory!
  378. include $(sort $(wildcard linux/linux-ext-*.mk))
  379. LINUX_PATCH_DEPENDENCIES += $(foreach ext,$(LINUX_EXTENSIONS),\
  380. $(if $(BR2_LINUX_KERNEL_EXT_$(call UPPERCASE,$(ext))),$(ext)))
  381. LINUX_PRE_PATCH_HOOKS += $(foreach ext,$(LINUX_EXTENSIONS),\
  382. $(if $(BR2_LINUX_KERNEL_EXT_$(call UPPERCASE,$(ext))),\
  383. $(call UPPERCASE,$(ext))_PREPARE_KERNEL))
  384. # Checks to give errors that the user can understand
  385. ifeq ($(BR_BUILDING),y)
  386. ifeq ($(BR2_LINUX_KERNEL_USE_DEFCONFIG),y)
  387. # We must use the user-supplied kconfig value, because
  388. # LINUX_KCONFIG_DEFCONFIG will at least contain the
  389. # trailing _defconfig
  390. ifeq ($(call qstrip,$(BR2_LINUX_KERNEL_DEFCONFIG)),)
  391. $(error No kernel defconfig name specified, check your BR2_LINUX_KERNEL_DEFCONFIG setting)
  392. endif
  393. endif
  394. ifeq ($(BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG),y)
  395. ifeq ($(LINUX_KCONFIG_FILE),)
  396. $(error No kernel configuration file specified, check your BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE setting)
  397. endif
  398. endif
  399. ifeq ($(BR2_LINUX_KERNEL_DTS_SUPPORT)$(KERNEL_DTS_NAME),y)
  400. $(error No kernel device tree source specified, check your \
  401. BR2_LINUX_KERNEL_USE_INTREE_DTS / BR2_LINUX_KERNEL_USE_CUSTOM_DTS settings)
  402. endif
  403. endif # BR_BUILDING
  404. $(eval $(kconfig-package))
  405. # Support for rebuilding the kernel after the cpio archive has
  406. # been generated in $(BINARIES_DIR)/rootfs.cpio.
  407. $(LINUX_DIR)/.stamp_initramfs_rebuilt: $(LINUX_DIR)/.stamp_target_installed $(LINUX_DIR)/.stamp_images_installed $(BINARIES_DIR)/rootfs.cpio
  408. @$(call MESSAGE,"Rebuilding kernel with initramfs")
  409. # Build the kernel.
  410. $(LINUX_MAKE_ENV) $(MAKE) $(LINUX_MAKE_FLAGS) -C $(@D) $(LINUX_TARGET_NAME)
  411. $(LINUX_APPEND_DTB)
  412. # Copy the kernel image(s) to its(their) final destination
  413. $(call LINUX_INSTALL_IMAGE,$(BINARIES_DIR))
  414. # If there is a .ub file copy it to the final destination
  415. test ! -f $(LINUX_IMAGE_PATH).ub || cp $(LINUX_IMAGE_PATH).ub $(BINARIES_DIR)
  416. $(Q)touch $@
  417. # The initramfs building code must make sure this target gets called
  418. # after it generated the initramfs list of files.
  419. linux-rebuild-with-initramfs: $(LINUX_DIR)/.stamp_initramfs_rebuilt