linux.mk 20 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 = GPL-2.0
  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 $(LINUX_TARBALL))
  20. else ifeq ($(BR2_LINUX_KERNEL_CUSTOM_GIT),y)
  21. LINUX_SITE = $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_REPO_URL))
  22. LINUX_SITE_METHOD = git
  23. else ifeq ($(BR2_LINUX_KERNEL_CUSTOM_HG),y)
  24. LINUX_SITE = $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_REPO_URL))
  25. LINUX_SITE_METHOD = hg
  26. else ifeq ($(BR2_LINUX_KERNEL_CUSTOM_SVN),y)
  27. LINUX_SITE = $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_REPO_URL))
  28. LINUX_SITE_METHOD = svn
  29. else ifeq ($(BR2_LINUX_KERNEL_LATEST_CIP_VERSION),y)
  30. LINUX_SITE = git://git.kernel.org/pub/scm/linux/kernel/git/cip/linux-cip.git
  31. else ifneq ($(findstring -rc,$(LINUX_VERSION)),)
  32. # Since 4.12-rc1, -rc kernels are generated from cgit. This also works for
  33. # older -rc kernels.
  34. LINUX_SITE = https://git.kernel.org/torvalds/t
  35. else
  36. LINUX_SOURCE = linux-$(LINUX_VERSION).tar.xz
  37. # In X.Y.Z, get X and Y. We replace dots and dashes by spaces in order
  38. # to use the $(word) function. We support versions such as 4.0, 3.1,
  39. # 2.6.32, 2.6.32-rc1, 3.0-rc6, etc.
  40. ifeq ($(findstring x2.6.,x$(LINUX_VERSION)),x2.6.)
  41. LINUX_SITE = $(BR2_KERNEL_MIRROR)/linux/kernel/v2.6
  42. else ifeq ($(findstring x3.,x$(LINUX_VERSION)),x3.)
  43. LINUX_SITE = $(BR2_KERNEL_MIRROR)/linux/kernel/v3.x
  44. else ifeq ($(findstring x4.,x$(LINUX_VERSION)),x4.)
  45. LINUX_SITE = $(BR2_KERNEL_MIRROR)/linux/kernel/v4.x
  46. endif
  47. endif
  48. ifeq ($(BR2_LINUX_KERNEL)$(BR2_LINUX_KERNEL_LATEST_VERSION),y)
  49. BR_NO_CHECK_HASH_FOR += $(LINUX_SOURCE)
  50. endif
  51. LINUX_PATCHES = $(call qstrip,$(BR2_LINUX_KERNEL_PATCH))
  52. # We have no way to know the hashes for user-supplied patches.
  53. BR_NO_CHECK_HASH_FOR += $(notdir $(LINUX_PATCHES))
  54. # We rely on the generic package infrastructure to download and apply
  55. # remote patches (downloaded from ftp, http or https). For local
  56. # patches, we can't rely on that infrastructure, because there might
  57. # be directories in the patch list (unlike for other packages).
  58. LINUX_PATCH = $(filter ftp://% http://% https://%,$(LINUX_PATCHES))
  59. LINUX_INSTALL_IMAGES = YES
  60. LINUX_DEPENDENCIES += host-kmod
  61. # host tools needed for kernel compression
  62. ifeq ($(BR2_LINUX_KERNEL_LZ4),y)
  63. LINUX_DEPENDENCIES += host-lz4
  64. else ifeq ($(BR2_LINUX_KERNEL_LZMA),y)
  65. LINUX_DEPENDENCIES += host-lzma
  66. else ifeq ($(BR2_LINUX_KERNEL_LZO),y)
  67. LINUX_DEPENDENCIES += host-lzop
  68. else ifeq ($(BR2_LINUX_KERNEL_XZ),y)
  69. LINUX_DEPENDENCIES += host-xz
  70. endif
  71. LINUX_COMPRESSION_OPT_$(BR2_LINUX_KERNEL_GZIP) += CONFIG_KERNEL_GZIP
  72. LINUX_COMPRESSION_OPT_$(BR2_LINUX_KERNEL_LZ4) += CONFIG_KERNEL_LZ4
  73. LINUX_COMPRESSION_OPT_$(BR2_LINUX_KERNEL_LZMA) += CONFIG_KERNEL_LZMA
  74. LINUX_COMPRESSION_OPT_$(BR2_LINUX_KERNEL_LZO) += CONFIG_KERNEL_LZO
  75. LINUX_COMPRESSION_OPT_$(BR2_LINUX_KERNEL_XZ) += CONFIG_KERNEL_XZ
  76. ifeq ($(BR2_LINUX_KERNEL_NEEDS_HOST_OPENSSL),y)
  77. LINUX_DEPENDENCIES += host-openssl
  78. endif
  79. ifeq ($(BR2_LINUX_KERNEL_NEEDS_HOST_LIBELF),y)
  80. LINUX_DEPENDENCIES += host-elfutils
  81. endif
  82. # If host-uboot-tools is selected by the user, assume it is needed to
  83. # create a custom image
  84. ifeq ($(BR2_PACKAGE_HOST_UBOOT_TOOLS),y)
  85. LINUX_DEPENDENCIES += host-uboot-tools
  86. endif
  87. ifneq ($(ARCH_XTENSA_OVERLAY_FILE),)
  88. define LINUX_XTENSA_OVERLAY_EXTRACT
  89. $(call arch-xtensa-overlay-extract,$(@D),linux)
  90. endef
  91. LINUX_POST_EXTRACT_HOOKS += LINUX_XTENSA_OVERLAY_EXTRACT
  92. LINUX_EXTRA_DOWNLOADS += $(ARCH_XTENSA_OVERLAY_URL)
  93. endif
  94. LINUX_MAKE_FLAGS = \
  95. HOSTCC="$(HOSTCC) $(HOST_CFLAGS) $(HOST_LDFLAGS)" \
  96. ARCH=$(KERNEL_ARCH) \
  97. INSTALL_MOD_PATH=$(TARGET_DIR) \
  98. CROSS_COMPILE="$(TARGET_CROSS)" \
  99. DEPMOD=$(HOST_DIR)/sbin/depmod
  100. LINUX_MAKE_ENV = \
  101. $(TARGET_MAKE_ENV) \
  102. BR_BINARIES_DIR=$(BINARIES_DIR)
  103. ifeq ($(BR2_REPRODUCIBLE),y)
  104. LINUX_MAKE_ENV += \
  105. KBUILD_BUILD_VERSION=1 \
  106. KBUILD_BUILD_USER=buildroot \
  107. KBUILD_BUILD_HOST=buildroot \
  108. KBUILD_BUILD_TIMESTAMP="$(shell LC_ALL=C date -d @$(SOURCE_DATE_EPOCH))"
  109. endif
  110. # Get the real Linux version, which tells us where kernel modules are
  111. # going to be installed in the target filesystem.
  112. LINUX_VERSION_PROBED = `$(MAKE) $(LINUX_MAKE_FLAGS) -C $(LINUX_DIR) --no-print-directory -s kernelrelease 2>/dev/null`
  113. KERNEL_DTS_NAME += $(call qstrip,$(BR2_LINUX_KERNEL_INTREE_DTS_NAME))
  114. # We keep only the .dts files, so that the user can specify both .dts
  115. # and .dtsi files in BR2_LINUX_KERNEL_CUSTOM_DTS_PATH. Both will be
  116. # copied to arch/<arch>/boot/dts, but only the .dts files will
  117. # actually be generated as .dtb.
  118. KERNEL_DTS_NAME += $(basename $(filter %.dts,$(notdir $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_DTS_PATH)))))
  119. KERNEL_DTBS = $(addsuffix .dtb,$(KERNEL_DTS_NAME))
  120. ifeq ($(BR2_LINUX_KERNEL_IMAGE_TARGET_CUSTOM),y)
  121. LINUX_IMAGE_NAME = $(call qstrip,$(BR2_LINUX_KERNEL_IMAGE_NAME))
  122. LINUX_TARGET_NAME = $(call qstrip,$(BR2_LINUX_KERNEL_IMAGE_TARGET_NAME))
  123. ifeq ($(LINUX_IMAGE_NAME),)
  124. LINUX_IMAGE_NAME = $(LINUX_TARGET_NAME)
  125. endif
  126. else
  127. ifeq ($(BR2_LINUX_KERNEL_UIMAGE),y)
  128. LINUX_IMAGE_NAME = uImage
  129. else ifeq ($(BR2_LINUX_KERNEL_APPENDED_UIMAGE),y)
  130. LINUX_IMAGE_NAME = uImage
  131. else ifeq ($(BR2_LINUX_KERNEL_BZIMAGE),y)
  132. LINUX_IMAGE_NAME = bzImage
  133. else ifeq ($(BR2_LINUX_KERNEL_ZIMAGE),y)
  134. LINUX_IMAGE_NAME = zImage
  135. else ifeq ($(BR2_LINUX_KERNEL_ZIMAGE_EPAPR),y)
  136. LINUX_IMAGE_NAME = zImage.epapr
  137. else ifeq ($(BR2_LINUX_KERNEL_APPENDED_ZIMAGE),y)
  138. LINUX_IMAGE_NAME = zImage
  139. else ifeq ($(BR2_LINUX_KERNEL_CUIMAGE),y)
  140. LINUX_IMAGE_NAME = cuImage.$(firstword $(KERNEL_DTS_NAME))
  141. else ifeq ($(BR2_LINUX_KERNEL_SIMPLEIMAGE),y)
  142. LINUX_IMAGE_NAME = simpleImage.$(firstword $(KERNEL_DTS_NAME))
  143. else ifeq ($(BR2_LINUX_KERNEL_IMAGE),y)
  144. LINUX_IMAGE_NAME = Image
  145. else ifeq ($(BR2_LINUX_KERNEL_LINUX_BIN),y)
  146. LINUX_IMAGE_NAME = linux.bin
  147. else ifeq ($(BR2_LINUX_KERNEL_VMLINUX_BIN),y)
  148. LINUX_IMAGE_NAME = vmlinux.bin
  149. else ifeq ($(BR2_LINUX_KERNEL_VMLINUX),y)
  150. LINUX_IMAGE_NAME = vmlinux
  151. else ifeq ($(BR2_LINUX_KERNEL_VMLINUZ),y)
  152. LINUX_IMAGE_NAME = vmlinuz
  153. else ifeq ($(BR2_LINUX_KERNEL_VMLINUZ_BIN),y)
  154. LINUX_IMAGE_NAME = vmlinuz.bin
  155. endif
  156. # The if-else blocks above are all the image types we know of, and all
  157. # come from a Kconfig choice, so we know we have LINUX_IMAGE_NAME set
  158. # to something
  159. LINUX_TARGET_NAME = $(LINUX_IMAGE_NAME)
  160. endif
  161. LINUX_KERNEL_UIMAGE_LOADADDR = $(call qstrip,$(BR2_LINUX_KERNEL_UIMAGE_LOADADDR))
  162. ifneq ($(LINUX_KERNEL_UIMAGE_LOADADDR),)
  163. LINUX_MAKE_FLAGS += LOADADDR="$(LINUX_KERNEL_UIMAGE_LOADADDR)"
  164. endif
  165. # Compute the arch path, since i386 and x86_64 are in arch/x86 and not
  166. # in arch/$(KERNEL_ARCH). Even if the kernel creates symbolic links
  167. # for bzImage, arch/i386 and arch/x86_64 do not exist when copying the
  168. # defconfig file.
  169. ifeq ($(KERNEL_ARCH),i386)
  170. KERNEL_ARCH_PATH = $(LINUX_DIR)/arch/x86
  171. else ifeq ($(KERNEL_ARCH),x86_64)
  172. KERNEL_ARCH_PATH = $(LINUX_DIR)/arch/x86
  173. else
  174. KERNEL_ARCH_PATH = $(LINUX_DIR)/arch/$(KERNEL_ARCH)
  175. endif
  176. ifeq ($(BR2_LINUX_KERNEL_VMLINUX),y)
  177. LINUX_IMAGE_PATH = $(LINUX_DIR)/$(LINUX_IMAGE_NAME)
  178. else ifeq ($(BR2_LINUX_KERNEL_VMLINUZ),y)
  179. LINUX_IMAGE_PATH = $(LINUX_DIR)/$(LINUX_IMAGE_NAME)
  180. else ifeq ($(BR2_LINUX_KERNEL_VMLINUZ_BIN),y)
  181. LINUX_IMAGE_PATH = $(LINUX_DIR)/$(LINUX_IMAGE_NAME)
  182. else
  183. LINUX_IMAGE_PATH = $(KERNEL_ARCH_PATH)/boot/$(LINUX_IMAGE_NAME)
  184. endif # BR2_LINUX_KERNEL_VMLINUX
  185. define LINUX_APPLY_LOCAL_PATCHES
  186. for p in $(filter-out ftp://% http://% https://%,$(LINUX_PATCHES)) ; do \
  187. if test -d $$p ; then \
  188. $(APPLY_PATCHES) $(@D) $$p \*.patch || exit 1 ; \
  189. else \
  190. $(APPLY_PATCHES) $(@D) `dirname $$p` `basename $$p` || exit 1; \
  191. fi \
  192. done
  193. endef
  194. LINUX_POST_PATCH_HOOKS += LINUX_APPLY_LOCAL_PATCHES
  195. # Older linux kernels use deprecated perl constructs in timeconst.pl
  196. # that were removed for perl 5.22+ so it breaks on newer distributions
  197. # Try a dry-run patch to see if this applies, if it does go ahead
  198. define LINUX_TRY_PATCH_TIMECONST
  199. @if patch -p1 --dry-run -f -s -d $(@D) <$(LINUX_PKGDIR)/0001-timeconst.pl-Eliminate-Perl-warning.patch.conditional >/dev/null ; then \
  200. $(APPLY_PATCHES) $(@D) $(LINUX_PKGDIR) 0001-timeconst.pl-Eliminate-Perl-warning.patch.conditional ; \
  201. fi
  202. endef
  203. LINUX_POST_PATCH_HOOKS += LINUX_TRY_PATCH_TIMECONST
  204. ifeq ($(BR2_LINUX_KERNEL_USE_DEFCONFIG),y)
  205. LINUX_KCONFIG_DEFCONFIG = $(call qstrip,$(BR2_LINUX_KERNEL_DEFCONFIG))_defconfig
  206. else ifeq ($(BR2_LINUX_KERNEL_USE_ARCH_DEFAULT_CONFIG),y)
  207. LINUX_KCONFIG_DEFCONFIG = defconfig
  208. else ifeq ($(BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG),y)
  209. LINUX_KCONFIG_FILE = $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE))
  210. endif
  211. LINUX_KCONFIG_FRAGMENT_FILES = $(call qstrip,$(BR2_LINUX_KERNEL_CONFIG_FRAGMENT_FILES))
  212. LINUX_KCONFIG_EDITORS = menuconfig xconfig gconfig nconfig
  213. # LINUX_MAKE_FLAGS overrides HOSTCC to allow the kernel build to find our
  214. # host-openssl and host-libelf. However, this triggers a bug in the kconfig
  215. # build script that causes it to build with /usr/include/ncurses.h (which is
  216. # typically wchar) but link with $(HOST_DIR)/lib/libncurses.so (which is not).
  217. # We don't actually need any host-package for kconfig, so remove the HOSTCC
  218. # override again.
  219. LINUX_KCONFIG_OPTS = $(LINUX_MAKE_FLAGS) HOSTCC="$(HOSTCC)"
  220. # If no package has yet set it, set it from the Kconfig option
  221. LINUX_NEEDS_MODULES ?= $(BR2_LINUX_NEEDS_MODULES)
  222. # Make sure the Linux kernel is built with the right endianness. Not
  223. # all architectures support
  224. # CONFIG_CPU_BIG_ENDIAN/CONFIG_CPU_LITTLE_ENDIAN in Linux, but the
  225. # option will be thrown away and ignored if it doesn't exist.
  226. ifeq ($(BR2_ENDIAN),"BIG")
  227. define LINUX_FIXUP_CONFIG_ENDIANNESS
  228. $(call KCONFIG_ENABLE_OPT,CONFIG_CPU_BIG_ENDIAN,$(@D)/.config)
  229. endef
  230. else
  231. define LINUX_FIXUP_CONFIG_ENDIANNESS
  232. $(call KCONFIG_ENABLE_OPT,CONFIG_CPU_LITTLE_ENDIAN,$(@D)/.config)
  233. endef
  234. endif
  235. define LINUX_KCONFIG_FIXUP_CMDS
  236. $(if $(LINUX_NEEDS_MODULES),
  237. $(call KCONFIG_ENABLE_OPT,CONFIG_MODULES,$(@D)/.config))
  238. $(call KCONFIG_ENABLE_OPT,$(strip $(LINUX_COMPRESSION_OPT_y)),$(@D)/.config)
  239. $(foreach opt, $(LINUX_COMPRESSION_OPT_),
  240. $(call KCONFIG_DISABLE_OPT,$(opt),$(@D)/.config)
  241. )
  242. $(LINUX_FIXUP_CONFIG_ENDIANNESS)
  243. $(if $(BR2_arm)$(BR2_armeb),
  244. $(call KCONFIG_ENABLE_OPT,CONFIG_AEABI,$(@D)/.config))
  245. $(if $(BR2_TARGET_ROOTFS_CPIO),
  246. $(call KCONFIG_ENABLE_OPT,CONFIG_BLK_DEV_INITRD,$(@D)/.config))
  247. # As the kernel gets compiled before root filesystems are
  248. # built, we create a fake cpio file. It'll be
  249. # replaced later by the real cpio archive, and the kernel will be
  250. # rebuilt using the linux-rebuild-with-initramfs target.
  251. $(if $(BR2_TARGET_ROOTFS_INITRAMFS),
  252. mkdir -p $(BINARIES_DIR)
  253. touch $(BINARIES_DIR)/rootfs.cpio
  254. $(call KCONFIG_SET_OPT,CONFIG_INITRAMFS_SOURCE,"$${BR_BINARIES_DIR}/rootfs.cpio",$(@D)/.config)
  255. $(call KCONFIG_SET_OPT,CONFIG_INITRAMFS_ROOT_UID,0,$(@D)/.config)
  256. $(call KCONFIG_SET_OPT,CONFIG_INITRAMFS_ROOT_GID,0,$(@D)/.config))
  257. $(if $(BR2_ROOTFS_DEVICE_CREATION_STATIC),,
  258. $(call KCONFIG_ENABLE_OPT,CONFIG_DEVTMPFS,$(@D)/.config)
  259. $(call KCONFIG_ENABLE_OPT,CONFIG_DEVTMPFS_MOUNT,$(@D)/.config))
  260. $(if $(BR2_ROOTFS_DEVICE_CREATION_DYNAMIC_EUDEV),
  261. $(call KCONFIG_ENABLE_OPT,CONFIG_INOTIFY_USER,$(@D)/.config))
  262. $(if $(BR2_PACKAGE_AUDIT),
  263. $(call KCONFIG_ENABLE_OPT,CONFIG_NET,$(@D)/.config)
  264. $(call KCONFIG_ENABLE_OPT,CONFIG_AUDIT,$(@D)/.config))
  265. $(if $(BR2_PACKAGE_KTAP),
  266. $(call KCONFIG_ENABLE_OPT,CONFIG_DEBUG_FS,$(@D)/.config)
  267. $(call KCONFIG_ENABLE_OPT,CONFIG_ENABLE_DEFAULT_TRACERS,$(@D)/.config)
  268. $(call KCONFIG_ENABLE_OPT,CONFIG_PERF_EVENTS,$(@D)/.config)
  269. $(call KCONFIG_ENABLE_OPT,CONFIG_FUNCTION_TRACER,$(@D)/.config))
  270. $(if $(BR2_PACKAGE_LINUX_TOOLS_PERF),
  271. $(call KCONFIG_ENABLE_OPT,CONFIG_PERF_EVENTS,$(@D)/.config))
  272. $(if $(BR2_PACKAGE_SYSTEMD),
  273. $(call KCONFIG_ENABLE_OPT,CONFIG_CGROUPS,$(@D)/.config)
  274. $(call KCONFIG_ENABLE_OPT,CONFIG_INOTIFY_USER,$(@D)/.config)
  275. $(call KCONFIG_ENABLE_OPT,CONFIG_FHANDLE,$(@D)/.config)
  276. $(call KCONFIG_ENABLE_OPT,CONFIG_AUTOFS4_FS,$(@D)/.config)
  277. $(call KCONFIG_ENABLE_OPT,CONFIG_TMPFS_POSIX_ACL,$(@D)/.config)
  278. $(call KCONFIG_ENABLE_OPT,CONFIG_TMPFS_XATTR,$(@D)/.config))
  279. $(if $(BR2_PACKAGE_SMACK),
  280. $(call KCONFIG_ENABLE_OPT,CONFIG_SECURITY,$(@D)/.config)
  281. $(call KCONFIG_ENABLE_OPT,CONFIG_SECURITY_SMACK,$(@D)/.config)
  282. $(call KCONFIG_ENABLE_OPT,CONFIG_SECURITY_NETWORK,$(@D)/.config))
  283. $(if $(BR2_PACKAGE_IPTABLES),
  284. $(call KCONFIG_ENABLE_OPT,CONFIG_IP_NF_IPTABLES,$(@D)/.config)
  285. $(call KCONFIG_ENABLE_OPT,CONFIG_IP_NF_FILTER,$(@D)/.config)
  286. $(call KCONFIG_ENABLE_OPT,CONFIG_NETFILTER,$(@D)/.config)
  287. $(call KCONFIG_ENABLE_OPT,CONFIG_NETFILTER_XTABLES,$(@D)/.config))
  288. $(if $(BR2_PACKAGE_XTABLES_ADDONS),
  289. $(call KCONFIG_ENABLE_OPT,CONFIG_NETFILTER_ADVANCED,$(@D)/.config)
  290. $(call KCONFIG_ENABLE_OPT,CONFIG_NF_CONNTRACK,$(@D)/.config)
  291. $(call KCONFIG_ENABLE_OPT,CONFIG_NF_CONNTRACK_MARK,$(@D)/.config))
  292. $(if $(BR2_PACKAGE_WIREGUARD),
  293. $(call KCONFIG_ENABLE_OPT,CONFIG_INET,$(@D)/.config)
  294. $(call KCONFIG_ENABLE_OPT,CONFIG_NET,$(@D)/.config)
  295. $(call KCONFIG_ENABLE_OPT,CONFIG_NET_FOU,$(@D)/.config)
  296. $(call KCONFIG_ENABLE_OPT,CONFIG_CRYPTO,$(@D)/.config)
  297. $(call KCONFIG_ENABLE_OPT,CONFIG_CRYPTO_MANAGER,$(@D)/.config))
  298. $(if $(BR2_LINUX_KERNEL_APPENDED_DTB),
  299. $(call KCONFIG_ENABLE_OPT,CONFIG_ARM_APPENDED_DTB,$(@D)/.config))
  300. $(if $(BR2_PACKAGE_KERNEL_MODULE_IMX_GPU_VIV),
  301. $(call KCONFIG_DISABLE_OPT,CONFIG_MXC_GPU_VIV,$(@D)/.config))
  302. endef
  303. ifeq ($(BR2_LINUX_KERNEL_DTS_SUPPORT),y)
  304. ifeq ($(BR2_LINUX_KERNEL_DTB_IS_SELF_BUILT),)
  305. define LINUX_BUILD_DTB
  306. $(LINUX_MAKE_ENV) $(MAKE) $(LINUX_MAKE_FLAGS) -C $(@D) $(KERNEL_DTBS)
  307. endef
  308. ifeq ($(BR2_LINUX_KERNEL_APPENDED_DTB),)
  309. define LINUX_INSTALL_DTB
  310. # dtbs moved from arch/<ARCH>/boot to arch/<ARCH>/boot/dts since 3.8-rc1
  311. cp $(addprefix \
  312. $(KERNEL_ARCH_PATH)/boot/$(if $(wildcard \
  313. $(addprefix $(KERNEL_ARCH_PATH)/boot/dts/,$(KERNEL_DTBS))),dts/),$(KERNEL_DTBS)) \
  314. $(1)
  315. endef
  316. endif # BR2_LINUX_KERNEL_APPENDED_DTB
  317. endif # BR2_LINUX_KERNEL_DTB_IS_SELF_BUILT
  318. endif # BR2_LINUX_KERNEL_DTS_SUPPORT
  319. ifeq ($(BR2_LINUX_KERNEL_APPENDED_DTB),y)
  320. # dtbs moved from arch/$ARCH/boot to arch/$ARCH/boot/dts since 3.8-rc1
  321. define LINUX_APPEND_DTB
  322. (cd $(KERNEL_ARCH_PATH)/boot; \
  323. for dtb in $(KERNEL_DTS_NAME); do \
  324. if test -e $${dtb}.dtb ; then \
  325. dtbpath=$${dtb}.dtb ; \
  326. else \
  327. dtbpath=dts/$${dtb}.dtb ; \
  328. fi ; \
  329. cat zImage $${dtbpath} > zImage.$${dtb} || exit 1; \
  330. done)
  331. endef
  332. ifeq ($(BR2_LINUX_KERNEL_APPENDED_UIMAGE),y)
  333. # We need to generate a new u-boot image that takes into
  334. # account the extra-size added by the device tree at the end
  335. # of the image. To do so, we first need to retrieve both load
  336. # address and entry point for the kernel from the already
  337. # generate uboot image before using mkimage -l.
  338. LINUX_APPEND_DTB += ; \
  339. MKIMAGE_ARGS=`$(MKIMAGE) -l $(LINUX_IMAGE_PATH) |\
  340. sed -n -e 's/Image Name:[ ]*\(.*\)/-n \1/p' -e 's/Load Address:/-a/p' -e 's/Entry Point:/-e/p'`; \
  341. for dtb in $(KERNEL_DTS_NAME); do \
  342. $(MKIMAGE) -A $(MKIMAGE_ARCH) -O linux \
  343. -T kernel -C none $${MKIMAGE_ARGS} \
  344. -d $(KERNEL_ARCH_PATH)/boot/zImage.$${dtb} $(LINUX_IMAGE_PATH).$${dtb}; \
  345. done
  346. endif
  347. endif
  348. # Compilation. We make sure the kernel gets rebuilt when the
  349. # configuration has changed.
  350. define LINUX_BUILD_CMDS
  351. @for dts in $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_DTS_PATH)); do \
  352. cp -f $${dts} $(KERNEL_ARCH_PATH)/boot/dts/ ; \
  353. done
  354. $(LINUX_MAKE_ENV) $(MAKE) $(LINUX_MAKE_FLAGS) -C $(@D) $(LINUX_TARGET_NAME)
  355. @if grep -q "CONFIG_MODULES=y" $(@D)/.config; then \
  356. $(LINUX_MAKE_ENV) $(MAKE) $(LINUX_MAKE_FLAGS) -C $(@D) modules ; \
  357. fi
  358. $(LINUX_BUILD_DTB)
  359. $(LINUX_APPEND_DTB)
  360. endef
  361. ifeq ($(BR2_LINUX_KERNEL_APPENDED_DTB),y)
  362. # When a DTB was appended, install the potential several images with
  363. # appended DTBs.
  364. define LINUX_INSTALL_IMAGE
  365. mkdir -p $(1)
  366. cp $(KERNEL_ARCH_PATH)/boot/$(LINUX_IMAGE_NAME).* $(1)
  367. endef
  368. else
  369. # Otherwise, just install the unique image generated by the kernel
  370. # build process.
  371. define LINUX_INSTALL_IMAGE
  372. $(INSTALL) -m 0644 -D $(LINUX_IMAGE_PATH) $(1)/$(LINUX_IMAGE_NAME)
  373. endef
  374. endif
  375. ifeq ($(BR2_LINUX_KERNEL_INSTALL_TARGET),y)
  376. define LINUX_INSTALL_KERNEL_IMAGE_TO_TARGET
  377. $(call LINUX_INSTALL_IMAGE,$(TARGET_DIR)/boot)
  378. $(call LINUX_INSTALL_DTB,$(TARGET_DIR)/boot)
  379. endef
  380. endif
  381. define LINUX_INSTALL_HOST_TOOLS
  382. # Installing dtc (device tree compiler) as host tool, if selected
  383. if grep -q "CONFIG_DTC=y" $(@D)/.config; then \
  384. $(INSTALL) -D -m 0755 $(@D)/scripts/dtc/dtc $(HOST_DIR)/bin/linux-dtc ; \
  385. $(if $(BR2_PACKAGE_HOST_DTC),,ln -sf linux-dtc $(HOST_DIR)/bin/dtc;) \
  386. fi
  387. endef
  388. define LINUX_INSTALL_IMAGES_CMDS
  389. $(call LINUX_INSTALL_IMAGE,$(BINARIES_DIR))
  390. $(call LINUX_INSTALL_DTB,$(BINARIES_DIR))
  391. endef
  392. ifeq ($(BR2_STRIP_strip),y)
  393. LINUX_MAKE_FLAGS += INSTALL_MOD_STRIP=1
  394. endif
  395. define LINUX_INSTALL_TARGET_CMDS
  396. $(LINUX_INSTALL_KERNEL_IMAGE_TO_TARGET)
  397. # Install modules and remove symbolic links pointing to build
  398. # directories, not relevant on the target
  399. @if grep -q "CONFIG_MODULES=y" $(@D)/.config; then \
  400. $(LINUX_MAKE_ENV) $(MAKE1) $(LINUX_MAKE_FLAGS) -C $(@D) modules_install; \
  401. rm -f $(TARGET_DIR)/lib/modules/$(LINUX_VERSION_PROBED)/build ; \
  402. rm -f $(TARGET_DIR)/lib/modules/$(LINUX_VERSION_PROBED)/source ; \
  403. fi
  404. $(LINUX_INSTALL_HOST_TOOLS)
  405. endef
  406. # Include all our extensions.
  407. #
  408. # Note: our package infrastructure uses the full-path of the last-scanned
  409. # Makefile to determine what package we're currently defining, using the
  410. # last directory component in the path. As such, including other Makefile,
  411. # like below, before we call one of the *-package macro is usally not
  412. # working.
  413. # However, since the files we include here are in the same directory as
  414. # the current Makefile, we are OK. But this is a hard requirement: files
  415. # included here *must* be in the same directory!
  416. include $(sort $(wildcard linux/linux-ext-*.mk))
  417. LINUX_PATCH_DEPENDENCIES += $(foreach ext,$(LINUX_EXTENSIONS),\
  418. $(if $(BR2_LINUX_KERNEL_EXT_$(call UPPERCASE,$(ext))),$(ext)))
  419. LINUX_PRE_PATCH_HOOKS += $(foreach ext,$(LINUX_EXTENSIONS),\
  420. $(if $(BR2_LINUX_KERNEL_EXT_$(call UPPERCASE,$(ext))),\
  421. $(call UPPERCASE,$(ext))_PREPARE_KERNEL))
  422. # Checks to give errors that the user can understand
  423. # When a custom repository has been set, check for the repository version
  424. ifeq ($(BR2_LINUX_KERNEL_CUSTOM_SVN)$(BR2_LINUX_KERNEL_CUSTOM_GIT)$(BR2_LINUX_KERNEL_CUSTOM_HG),y)
  425. ifeq ($(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_REPO_VERSION)),)
  426. $(error No custom repository version set. Check your BR2_LINUX_KERNEL_CUSTOM_REPO_VERSION setting)
  427. endif
  428. ifeq ($(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_REPO_URL)),)
  429. $(error No custom repo URL set. Check your BR2_LINUX_KERNEL_CUSTOM_REPO_URL setting)
  430. endif
  431. endif
  432. ifeq ($(BR_BUILDING),y)
  433. ifeq ($(BR2_LINUX_KERNEL_USE_DEFCONFIG),y)
  434. # We must use the user-supplied kconfig value, because
  435. # LINUX_KCONFIG_DEFCONFIG will at least contain the
  436. # trailing _defconfig
  437. ifeq ($(call qstrip,$(BR2_LINUX_KERNEL_DEFCONFIG)),)
  438. $(error No kernel defconfig name specified, check your BR2_LINUX_KERNEL_DEFCONFIG setting)
  439. endif
  440. endif
  441. ifeq ($(BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG),y)
  442. ifeq ($(LINUX_KCONFIG_FILE),)
  443. $(error No kernel configuration file specified, check your BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE setting)
  444. endif
  445. endif
  446. ifeq ($(BR2_LINUX_KERNEL_DTS_SUPPORT):$(strip $(KERNEL_DTS_NAME)),y:)
  447. $(error No kernel device tree source specified, check your \
  448. BR2_LINUX_KERNEL_INTREE_DTS_NAME / BR2_LINUX_KERNEL_CUSTOM_DTS_PATH settings)
  449. endif
  450. endif # BR_BUILDING
  451. $(eval $(kconfig-package))
  452. # Support for rebuilding the kernel after the cpio archive has
  453. # been generated.
  454. .PHONY: linux-rebuild-with-initramfs
  455. linux-rebuild-with-initramfs: $(LINUX_DIR)/.stamp_target_installed
  456. linux-rebuild-with-initramfs: $(LINUX_DIR)/.stamp_images_installed
  457. linux-rebuild-with-initramfs: rootfs-cpio
  458. linux-rebuild-with-initramfs:
  459. @$(call MESSAGE,"Rebuilding kernel with initramfs")
  460. # Build the kernel.
  461. $(LINUX_MAKE_ENV) $(MAKE) $(LINUX_MAKE_FLAGS) -C $(LINUX_DIR) $(LINUX_TARGET_NAME)
  462. $(LINUX_APPEND_DTB)
  463. # Copy the kernel image(s) to its(their) final destination
  464. $(call LINUX_INSTALL_IMAGE,$(BINARIES_DIR))
  465. # If there is a .ub file copy it to the final destination
  466. test ! -f $(LINUX_IMAGE_PATH).ub || cp $(LINUX_IMAGE_PATH).ub $(BINARIES_DIR)