linux/linux.mk

   1 ################################################################################
   2 #
   3 # Linux kernel target
   4 #
   5 ################################################################################
   6
   7 LINUX_VERSION = $(call qstrip,$(BR2_LINUX_KERNEL_VERSION))
   8 LINUX_LICENSE = GPLv2
   9 LINUX_LICENSE_FILES = COPYING
  10
  11 # Compute LINUX_SOURCE and LINUX_SITE from the configuration
  12 ifeq ($(BR2_LINUX_KERNEL_CUSTOM_TARBALL),y)
  13 LINUX_TARBALL = $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_TARBALL_LOCATION))
  14 LINUX_SITE = $(patsubst %/,%,$(dir $(LINUX_TARBALL)))
  15 LINUX_SOURCE = $(notdir $(LINUX_TARBALL))
  16 BR_NO_CHECK_HASH_FOR += $(LINUX_SOURCE)
  17 else ifeq ($(BR2_LINUX_KERNEL_CUSTOM_LOCAL),y)
  18 LINUX_SITE = $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_LOCAL_PATH))
  19 LINUX_SITE_METHOD = local
  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
  27 LINUX_SOURCE = linux-$(LINUX_VERSION).tar.xz
  28 ifeq ($(BR2_LINUX_KERNEL_CUSTOM_VERSION),y)
  29 BR_NO_CHECK_HASH_FOR += $(LINUX_SOURCE)
  30 endif
  31 # In X.Y.Z, get X and Y. We replace dots and dashes by spaces in order
  32 # to use the $(word) function. We support versions such as 4.0, 3.1,
  33 # 2.6.32, 2.6.32-rc1, 3.0-rc6, etc.
  34 ifeq ($(findstring x2.6.,x$(LINUX_VERSION)),x2.6.)
  35 LINUX_SITE = $(BR2_KERNEL_MIRROR)/linux/kernel/v2.6
  36 else ifeq ($(findstring x3.,x$(LINUX_VERSION)),x3.)
  37 LINUX_SITE = $(BR2_KERNEL_MIRROR)/linux/kernel/v3.x
  38 else ifeq ($(findstring x4.,x$(LINUX_VERSION)),x4.)
  39 LINUX_SITE = $(BR2_KERNEL_MIRROR)/linux/kernel/v4.x
  40 endif
  41 # release candidates are in testing/ subdir
  42 ifneq ($(findstring -rc,$(LINUX_VERSION)),)
  43 LINUX_SITE := $(LINUX_SITE)/testing
  44 endif # -rc
  45 endif
  46
  47 LINUX_PATCHES = $(call qstrip,$(BR2_LINUX_KERNEL_PATCH))
  48
  49 # We rely on the generic package infrastructure to download and apply
  50 # remote patches (downloaded from ftp, http or https). For local
  51 # patches, we can't rely on that infrastructure, because there might
  52 # be directories in the patch list (unlike for other packages).
  53 LINUX_PATCH = $(filter ftp://% http://% https://%,$(LINUX_PATCHES))
  54
  55 LINUX_INSTALL_IMAGES = YES
  56 LINUX_DEPENDENCIES += host-kmod
  57
  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_$(BR2_LINUX_KERNEL_XZ) = CONFIG_KERNEL_XZ
  73
  74 ifeq ($(BR2_LINUX_KERNEL_UBOOT_IMAGE),y)
  75 LINUX_DEPENDENCIES += host-uboot-tools
  76 endif
  77
  78 LINUX_MAKE_FLAGS = \
  79         HOSTCC="$(HOSTCC)" \
  80         HOSTCFLAGS="$(HOSTCFLAGS)" \
  81         ARCH=$(KERNEL_ARCH) \
  82         INSTALL_MOD_PATH=$(TARGET_DIR) \
  83         CROSS_COMPILE="$(TARGET_CROSS)" \
  84         DEPMOD=$(HOST_DIR)/sbin/depmod
  85
  86 LINUX_MAKE_ENV = \
  87         $(TARGET_MAKE_ENV) \
  88         BR_BINARIES_DIR=$(BINARIES_DIR)
  89
  90 # Get the real Linux version, which tells us where kernel modules are
  91 # going to be installed in the target filesystem.
  92 LINUX_VERSION_PROBED = `$(MAKE) $(LINUX_MAKE_FLAGS) -C $(LINUX_DIR) --no-print-directory -s kernelrelease 2>/dev/null`
  93
  94 ifeq ($(BR2_LINUX_KERNEL_USE_INTREE_DTS),y)
  95 KERNEL_DTS_NAME = $(call qstrip,$(BR2_LINUX_KERNEL_INTREE_DTS_NAME))
  96 else ifeq ($(BR2_LINUX_KERNEL_USE_CUSTOM_DTS),y)
  97 # We keep only the .dts files, so that the user can specify both .dts
  98 # and .dtsi files in BR2_LINUX_KERNEL_CUSTOM_DTS_PATH. Both will be
  99 # copied to arch/<arch>/boot/dts, but only the .dts files will
 100 # actually be generated as .dtb.
 101 KERNEL_DTS_NAME = $(basename $(filter %.dts,$(notdir $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_DTS_PATH)))))
 102 endif
 103
 104 KERNEL_DTBS = $(addsuffix .dtb,$(KERNEL_DTS_NAME))
 105
 106 ifeq ($(BR2_LINUX_KERNEL_IMAGE_TARGET_CUSTOM),y)
 107 LINUX_IMAGE_NAME = $(call qstrip,$(BR2_LINUX_KERNEL_IMAGE_NAME))
 108 LINUX_TARGET_NAME = $(call qstrip,$(BR2_LINUX_KERNEL_IMAGE_TARGET_NAME))
 109 ifeq ($(LINUX_IMAGE_NAME),)
 110 LINUX_IMAGE_NAME = $(LINUX_TARGET_NAME)
 111 endif
 112 else
 113 ifeq ($(BR2_LINUX_KERNEL_UIMAGE),y)
 114 LINUX_IMAGE_NAME = uImage
 115 else ifeq ($(BR2_LINUX_KERNEL_APPENDED_UIMAGE),y)
 116 LINUX_IMAGE_NAME = uImage
 117 else ifeq ($(BR2_LINUX_KERNEL_BZIMAGE),y)
 118 LINUX_IMAGE_NAME = bzImage
 119 else ifeq ($(BR2_LINUX_KERNEL_ZIMAGE),y)
 120 LINUX_IMAGE_NAME = zImage
 121 else ifeq ($(BR2_LINUX_KERNEL_ZIMAGE_EPAPR),y)
 122 LINUX_IMAGE_NAME = zImage.epapr
 123 else ifeq ($(BR2_LINUX_KERNEL_APPENDED_ZIMAGE),y)
 124 LINUX_IMAGE_NAME = zImage
 125 else ifeq ($(BR2_LINUX_KERNEL_CUIMAGE),y)
 126 LINUX_IMAGE_NAME = cuImage.$(KERNEL_DTS_NAME)
 127 else ifeq ($(BR2_LINUX_KERNEL_SIMPLEIMAGE),y)
 128 LINUX_IMAGE_NAME = simpleImage.$(KERNEL_DTS_NAME)
 129 else ifeq ($(BR2_LINUX_KERNEL_IMAGE),y)
 130 LINUX_IMAGE_NAME = Image
 131 else ifeq ($(BR2_LINUX_KERNEL_LINUX_BIN),y)
 132 LINUX_IMAGE_NAME = linux.bin
 133 else ifeq ($(BR2_LINUX_KERNEL_VMLINUX_BIN),y)
 134 LINUX_IMAGE_NAME = vmlinux.bin
 135 else ifeq ($(BR2_LINUX_KERNEL_VMLINUX),y)
 136 LINUX_IMAGE_NAME = vmlinux
 137 else ifeq ($(BR2_LINUX_KERNEL_VMLINUZ),y)
 138 LINUX_IMAGE_NAME = vmlinuz
 139 else ifeq ($(BR2_LINUX_KERNEL_VMLINUZ_BIN),y)
 140 LINUX_IMAGE_NAME = vmlinuz.bin
 141 endif
 142 # The if-else blocks above are all the image types we know of, and all
 143 # come from a Kconfig choice, so we know we have LINUX_IMAGE_NAME set
 144 # to something
 145 LINUX_TARGET_NAME = $(LINUX_IMAGE_NAME)
 146 endif
 147
 148 LINUX_KERNEL_UIMAGE_LOADADDR = $(call qstrip,$(BR2_LINUX_KERNEL_UIMAGE_LOADADDR))
 149 ifneq ($(LINUX_KERNEL_UIMAGE_LOADADDR),)
 150 LINUX_MAKE_FLAGS += LOADADDR="$(LINUX_KERNEL_UIMAGE_LOADADDR)"
 151 endif
 152
 153 # Compute the arch path, since i386 and x86_64 are in arch/x86 and not
 154 # in arch/$(KERNEL_ARCH). Even if the kernel creates symbolic links
 155 # for bzImage, arch/i386 and arch/x86_64 do not exist when copying the
 156 # defconfig file.
 157 ifeq ($(KERNEL_ARCH),i386)
 158 KERNEL_ARCH_PATH = $(LINUX_DIR)/arch/x86
 159 else ifeq ($(KERNEL_ARCH),x86_64)
 160 KERNEL_ARCH_PATH = $(LINUX_DIR)/arch/x86
 161 else
 162 KERNEL_ARCH_PATH = $(LINUX_DIR)/arch/$(KERNEL_ARCH)
 163 endif
 164
 165 ifeq ($(BR2_LINUX_KERNEL_VMLINUX),y)
 166 LINUX_IMAGE_PATH = $(LINUX_DIR)/$(LINUX_IMAGE_NAME)
 167 else ifeq ($(BR2_LINUX_KERNEL_VMLINUZ),y)
 168 LINUX_IMAGE_PATH = $(LINUX_DIR)/$(LINUX_IMAGE_NAME)
 169 else ifeq ($(BR2_LINUX_KERNEL_VMLINUZ_BIN),y)
 170 LINUX_IMAGE_PATH = $(LINUX_DIR)/$(LINUX_IMAGE_NAME)
 171 else
 172 LINUX_IMAGE_PATH = $(KERNEL_ARCH_PATH)/boot/$(LINUX_IMAGE_NAME)
 173 endif # BR2_LINUX_KERNEL_VMLINUX
 174
 175 define LINUX_APPLY_LOCAL_PATCHES
 176         for p in $(filter-out ftp://% http://% https://%,$(LINUX_PATCHES)) ; do \
 177                 if test -d $$p ; then \
 178                         $(APPLY_PATCHES) $(@D) $$p \*.patch || exit 1 ; \
 179                 else \
 180                         $(APPLY_PATCHES) $(@D) `dirname $$p` `basename $$p` || exit 1; \
 181                 fi \
 182         done
 183 endef
 184
 185 LINUX_POST_PATCH_HOOKS += LINUX_APPLY_LOCAL_PATCHES
 186
 187 # Older linux kernels use deprecated perl constructs in timeconst.pl
 188 # that were removed for perl 5.22+ so it breaks on newer distributions
 189 # Try a dry-run patch to see if this applies, if it does go ahead
 190 define LINUX_TRY_PATCH_TIMECONST
 191         @if patch -p1 --dry-run -f -s -d $(@D) <$(LINUX_PKGDIR)/0001-timeconst.pl-Eliminate-Perl-warning.patch.conditional >/dev/null ; then \
 192                 $(APPLY_PATCHES) $(@D) $(LINUX_PKGDIR) 0001-timeconst.pl-Eliminate-Perl-warning.patch.conditional ; \
 193         fi
 194 endef
 195 LINUX_POST_PATCH_HOOKS += LINUX_TRY_PATCH_TIMECONST
 196
 197 ifeq ($(BR2_LINUX_KERNEL_USE_DEFCONFIG),y)
 198 LINUX_KCONFIG_DEFCONFIG = $(call qstrip,$(BR2_LINUX_KERNEL_DEFCONFIG))_defconfig
 199 else ifeq ($(BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG),y)
 200 LINUX_KCONFIG_FILE = $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE))
 201 endif
 202 LINUX_KCONFIG_FRAGMENT_FILES = $(call qstrip,$(BR2_LINUX_KERNEL_CONFIG_FRAGMENT_FILES))
 203 LINUX_KCONFIG_EDITORS = menuconfig xconfig gconfig nconfig
 204 LINUX_KCONFIG_OPTS = $(LINUX_MAKE_FLAGS)
 205
 206 # If no package has yet set it, set it from the Kconfig option
 207 LINUX_NEEDS_MODULES ?= $(BR2_LINUX_NEEDS_MODULES)
 208
 209 define LINUX_KCONFIG_FIXUP_CMDS
 210         $(if $(LINUX_NEEDS_MODULES),
 211                 $(call KCONFIG_ENABLE_OPT,CONFIG_MODULES,$(@D)/.config))
 212         $(call KCONFIG_ENABLE_OPT,$(LINUX_COMPRESSION_OPT_y),$(@D)/.config)
 213         $(foreach opt, $(LINUX_COMPRESSION_OPT_),
 214                 $(call KCONFIG_DISABLE_OPT,$(opt),$(@D)/.config)
 215         )
 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
 265 ifeq ($(BR2_LINUX_KERNEL_DTS_SUPPORT),y)
 266 ifeq ($(BR2_LINUX_KERNEL_DTB_IS_SELF_BUILT),)
 267 define LINUX_BUILD_DTB
 268         $(LINUX_MAKE_ENV) $(MAKE) $(LINUX_MAKE_FLAGS) -C $(@D) $(KERNEL_DTBS)
 269 endef
 270 ifeq ($(BR2_LINUX_KERNEL_APPENDED_DTB),)
 271 define LINUX_INSTALL_DTB
 272         # dtbs moved from arch/<ARCH>/boot to arch/<ARCH>/boot/dts since 3.8-rc1
 273         cp $(addprefix \
 274                 $(KERNEL_ARCH_PATH)/boot/$(if $(wildcard \
 275                 $(addprefix $(KERNEL_ARCH_PATH)/boot/dts/,$(KERNEL_DTBS))),dts/),$(KERNEL_DTBS)) \
 276                 $(1)
 277 endef
 278 endif # BR2_LINUX_KERNEL_APPENDED_DTB
 279 endif # BR2_LINUX_KERNEL_DTB_IS_SELF_BUILT
 280 endif # BR2_LINUX_KERNEL_DTS_SUPPORT
 281
 282 ifeq ($(BR2_LINUX_KERNEL_APPENDED_DTB),y)
 283 # dtbs moved from arch/$ARCH/boot to arch/$ARCH/boot/dts since 3.8-rc1
 284 define LINUX_APPEND_DTB
 285         (cd $(KERNEL_ARCH_PATH)/boot; \
 286                 for dtb in $(KERNEL_DTS_NAME); do \
 287                         if test -e $${dtb}.dtb ; then \
 288                                 dtbpath=$${dtb}.dtb ; \
 289                         else \
 290                                 dtbpath=dts/$${dtb}.dtb ; \
 291                         fi ; \
 292                         cat zImage $${dtbpath} > zImage.$${dtb} || exit 1; \
 293                 done)
 294 endef
 295 ifeq ($(BR2_LINUX_KERNEL_APPENDED_UIMAGE),y)
 296 # We need to generate a new u-boot image that takes into
 297 # account the extra-size added by the device tree at the end
 298 # of the image. To do so, we first need to retrieve both load
 299 # address and entry point for the kernel from the already
 300 # generate uboot image before using mkimage -l.
 301 LINUX_APPEND_DTB += ; \
 302         MKIMAGE_ARGS=`$(MKIMAGE) -l $(LINUX_IMAGE_PATH) |\
 303         sed -n -e 's/Image Name:[ ]*\(.*\)/-n \1/p' -e 's/Load Address:/-a/p' -e 's/Entry Point:/-e/p'`; \
 304         for dtb in $(KERNEL_DTS_NAME); do \
 305                 $(MKIMAGE) -A $(MKIMAGE_ARCH) -O linux \
 306                         -T kernel -C none $${MKIMAGE_ARGS} \
 307                         -d $(KERNEL_ARCH_PATH)/boot/zImage.$${dtb} $(LINUX_IMAGE_PATH).$${dtb}; \
 308         done
 309 endif
 310 endif
 311
 312 # Compilation. We make sure the kernel gets rebuilt when the
 313 # configuration has changed.
 314 define LINUX_BUILD_CMDS
 315         $(if $(BR2_LINUX_KERNEL_USE_CUSTOM_DTS),
 316                 cp -f $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_DTS_PATH)) $(KERNEL_ARCH_PATH)/boot/dts/)
 317         $(LINUX_MAKE_ENV) $(MAKE) $(LINUX_MAKE_FLAGS) -C $(@D) $(LINUX_TARGET_NAME)
 318         @if grep -q "CONFIG_MODULES=y" $(@D)/.config; then      \
 319                 $(LINUX_MAKE_ENV) $(MAKE) $(LINUX_MAKE_FLAGS) -C $(@D) modules ;        \
 320         fi
 321         $(LINUX_BUILD_DTB)
 322         $(LINUX_APPEND_DTB)
 323 endef
 324
 325 ifeq ($(BR2_LINUX_KERNEL_APPENDED_DTB),y)
 326 # When a DTB was appended, install the potential several images with
 327 # appended DTBs.
 328 define LINUX_INSTALL_IMAGE
 329         mkdir -p $(1)
 330         cp $(KERNEL_ARCH_PATH)/boot/$(LINUX_IMAGE_NAME).* $(1)
 331 endef
 332 else
 333 # Otherwise, just install the unique image generated by the kernel
 334 # build process.
 335 define LINUX_INSTALL_IMAGE
 336         $(INSTALL) -m 0644 -D $(LINUX_IMAGE_PATH) $(1)/$(LINUX_IMAGE_NAME)
 337 endef
 338 endif
 339
 340 ifeq ($(BR2_LINUX_KERNEL_INSTALL_TARGET),y)
 341 define LINUX_INSTALL_KERNEL_IMAGE_TO_TARGET
 342         $(call LINUX_INSTALL_IMAGE,$(TARGET_DIR)/boot)
 343         $(call LINUX_INSTALL_DTB,$(TARGET_DIR)/boot)
 344 endef
 345 endif
 346
 347 define LINUX_INSTALL_HOST_TOOLS
 348         # Installing dtc (device tree compiler) as host tool, if selected
 349         if grep -q "CONFIG_DTC=y" $(@D)/.config; then   \
 350                 $(INSTALL) -D -m 0755 $(@D)/scripts/dtc/dtc $(HOST_DIR)/usr/bin/linux-dtc ;     \
 351         fi
 352 endef
 353
 354
 355 define LINUX_INSTALL_IMAGES_CMDS
 356         $(call LINUX_INSTALL_IMAGE,$(BINARIES_DIR))
 357         $(call LINUX_INSTALL_DTB,$(BINARIES_DIR))
 358 endef
 359
 360 define LINUX_INSTALL_TARGET_CMDS
 361         $(LINUX_INSTALL_KERNEL_IMAGE_TO_TARGET)
 362         # Install modules and remove symbolic links pointing to build
 363         # directories, not relevant on the target
 364         @if grep -q "CONFIG_MODULES=y" $(@D)/.config; then      \
 365                 $(LINUX_MAKE_ENV) $(MAKE1) $(LINUX_MAKE_FLAGS) -C $(@D) modules_install; \
 366                 rm -f $(TARGET_DIR)/lib/modules/$(LINUX_VERSION_PROBED)/build ;         \
 367                 rm -f $(TARGET_DIR)/lib/modules/$(LINUX_VERSION_PROBED)/source ;        \
 368         fi
 369         $(LINUX_INSTALL_HOST_TOOLS)
 370 endef
 371
 372 # Include all our extensions and tools definitions.
 373 #
 374 # Note: our package infrastructure uses the full-path of the last-scanned
 375 # Makefile to determine what package we're currently defining, using the
 376 # last directory component in the path. As such, including other Makefile,
 377 # like below, before we call one of the *-package macro is usally not
 378 # working.
 379 # However, since the files we include here are in the same directory as
 380 # the current Makefile, we are OK. But this is a hard requirement: files
 381 # included here *must* be in the same directory!
 382 include $(sort $(wildcard linux/linux-ext-*.mk))
 383 include $(sort $(wildcard linux/linux-tool-*.mk))
 384
 385 LINUX_PATCH_DEPENDENCIES += $(foreach ext,$(LINUX_EXTENSIONS),\
 386         $(if $(BR2_LINUX_KERNEL_EXT_$(call UPPERCASE,$(ext))),$(ext)))
 387
 388 LINUX_PRE_PATCH_HOOKS += $(foreach ext,$(LINUX_EXTENSIONS),\
 389         $(if $(BR2_LINUX_KERNEL_EXT_$(call UPPERCASE,$(ext))),\
 390                 $(call UPPERCASE,$(ext))_PREPARE_KERNEL))
 391
 392 # Install Linux kernel tools in the staging directory since some tools
 393 # may install shared libraries and headers (e.g. cpupower). The kernel
 394 # image is NOT installed in the staging directory.
 395 LINUX_INSTALL_STAGING = YES
 396
 397 LINUX_DEPENDENCIES += $(foreach tool,$(LINUX_TOOLS),\
 398         $(if $(BR2_LINUX_KERNEL_TOOL_$(call UPPERCASE,$(tool))),\
 399                 $($(call UPPERCASE,$(tool))_DEPENDENCIES)))
 400
 401 LINUX_POST_BUILD_HOOKS += $(foreach tool,$(LINUX_TOOLS),\
 402         $(if $(BR2_LINUX_KERNEL_TOOL_$(call UPPERCASE,$(tool))),\
 403                 $(call UPPERCASE,$(tool))_BUILD_CMDS))
 404
 405 LINUX_POST_INSTALL_STAGING_HOOKS += $(foreach tool,$(LINUX_TOOLS),\
 406         $(if $(BR2_LINUX_KERNEL_TOOL_$(call UPPERCASE,$(tool))),\
 407                 $(call UPPERCASE,$(tool))_INSTALL_STAGING_CMDS))
 408
 409 LINUX_POST_INSTALL_TARGET_HOOKS += $(foreach tool,$(LINUX_TOOLS),\
 410         $(if $(BR2_LINUX_KERNEL_TOOL_$(call UPPERCASE,$(tool))),\
 411                 $(call UPPERCASE,$(tool))_INSTALL_TARGET_CMDS))
 412
 413 # Checks to give errors that the user can understand
 414 ifeq ($(BR_BUILDING),y)
 415
 416 ifeq ($(BR2_LINUX_KERNEL_USE_DEFCONFIG),y)
 417 # We must use the user-supplied kconfig value, because
 418 # LINUX_KCONFIG_DEFCONFIG will at least contain the
 419 # trailing _defconfig
 420 ifeq ($(call qstrip,$(BR2_LINUX_KERNEL_DEFCONFIG)),)
 421 $(error No kernel defconfig name specified, check your BR2_LINUX_KERNEL_DEFCONFIG setting)
 422 endif
 423 endif
 424
 425 ifeq ($(BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG),y)
 426 ifeq ($(LINUX_KCONFIG_FILE),)
 427 $(error No kernel configuration file specified, check your BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE setting)
 428 endif
 429 endif
 430
 431 ifeq ($(BR2_LINUX_KERNEL_DTS_SUPPORT)$(KERNEL_DTS_NAME),y)
 432 $(error No kernel device tree source specified, check your \
 433 BR2_LINUX_KERNEL_USE_INTREE_DTS / BR2_LINUX_KERNEL_USE_CUSTOM_DTS settings)
 434 endif
 435
 436 endif # BR_BUILDING
 437
 438 $(eval $(kconfig-package))
 439
 440 # Support for rebuilding the kernel after the cpio archive has
 441 # been generated in $(BINARIES_DIR)/rootfs.cpio.
 442 $(LINUX_DIR)/.stamp_initramfs_rebuilt: $(LINUX_DIR)/.stamp_target_installed $(LINUX_DIR)/.stamp_images_installed $(BINARIES_DIR)/rootfs.cpio
 443         @$(call MESSAGE,"Rebuilding kernel with initramfs")
 444         # Build the kernel.
 445         $(LINUX_MAKE_ENV) $(MAKE) $(LINUX_MAKE_FLAGS) -C $(@D) $(LINUX_TARGET_NAME)
 446         $(LINUX_APPEND_DTB)
 447         # Copy the kernel image to its final destination
 448         cp $(LINUX_IMAGE_PATH) $(BINARIES_DIR)
 449         # If there is a .ub file copy it to the final destination
 450         test ! -f $(LINUX_IMAGE_PATH).ub || cp $(LINUX_IMAGE_PATH).ub $(BINARIES_DIR)
 451         $(Q)touch $@
 452
 453 # The initramfs building code must make sure this target gets called
 454 # after it generated the initramfs list of files.
 455 linux-rebuild-with-initramfs: $(LINUX_DIR)/.stamp_initramfs_rebuilt