1 ################################################################################
5 ################################################################################
7 LINUX_VERSION = $(call qstrip,$(BR2_LINUX_KERNEL_VERSION))
8 LINUX_LICENSE = GPL-2.0
9 LINUX_LICENSE_FILES = COPYING
11 define LINUX_HELP_CMDS
12 @echo ' linux-menuconfig - Run Linux kernel menuconfig'
13 @echo ' linux-savedefconfig - Run Linux kernel savedefconfig'
14 @echo ' linux-update-defconfig - Save the Linux configuration to the path specified'
15 @echo ' by BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE'
18 # Compute LINUX_SOURCE and LINUX_SITE from the configuration
19 ifeq ($(BR2_LINUX_KERNEL_CUSTOM_TARBALL),y)
20 LINUX_TARBALL = $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_TARBALL_LOCATION))
21 LINUX_SITE = $(patsubst %/,%,$(dir $(LINUX_TARBALL)))
22 LINUX_SOURCE = $(notdir $(LINUX_TARBALL))
23 else ifeq ($(BR2_LINUX_KERNEL_CUSTOM_GIT),y)
24 LINUX_SITE = $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_REPO_URL))
25 LINUX_SITE_METHOD = git
26 else ifeq ($(BR2_LINUX_KERNEL_CUSTOM_HG),y)
27 LINUX_SITE = $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_REPO_URL))
28 LINUX_SITE_METHOD = hg
29 else ifeq ($(BR2_LINUX_KERNEL_CUSTOM_SVN),y)
30 LINUX_SITE = $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_REPO_URL))
31 LINUX_SITE_METHOD = svn
32 else ifeq ($(BR2_LINUX_KERNEL_LATEST_CIP_VERSION),y)
33 LINUX_SITE = git://git.kernel.org/pub/scm/linux/kernel/git/bwh/linux-cip.git
34 else ifneq ($(findstring -rc,$(LINUX_VERSION)),)
35 # Since 4.12-rc1, -rc kernels are generated from cgit. This also works for
37 LINUX_SITE = https://git.kernel.org/torvalds/t
39 LINUX_SOURCE = linux-$(LINUX_VERSION).tar.xz
40 # In X.Y.Z, get X and Y. We replace dots and dashes by spaces in order
41 # to use the $(word) function. We support versions such as 4.0, 3.1,
42 # 2.6.32, 2.6.32-rc1, 3.0-rc6, etc.
43 ifeq ($(findstring x2.6.,x$(LINUX_VERSION)),x2.6.)
44 LINUX_SITE = $(BR2_KERNEL_MIRROR)/linux/kernel/v2.6
45 else ifeq ($(findstring x3.,x$(LINUX_VERSION)),x3.)
46 LINUX_SITE = $(BR2_KERNEL_MIRROR)/linux/kernel/v3.x
47 else ifeq ($(findstring x4.,x$(LINUX_VERSION)),x4.)
48 LINUX_SITE = $(BR2_KERNEL_MIRROR)/linux/kernel/v4.x
52 ifeq ($(BR2_LINUX_KERNEL)$(BR2_LINUX_KERNEL_LATEST_VERSION),y)
53 BR_NO_CHECK_HASH_FOR += $(LINUX_SOURCE)
56 LINUX_PATCHES = $(call qstrip,$(BR2_LINUX_KERNEL_PATCH))
58 # We rely on the generic package infrastructure to download and apply
59 # remote patches (downloaded from ftp, http or https). For local
60 # patches, we can't rely on that infrastructure, because there might
61 # be directories in the patch list (unlike for other packages).
62 LINUX_PATCH = $(filter ftp://% http://% https://%,$(LINUX_PATCHES))
64 LINUX_INSTALL_IMAGES = YES
65 LINUX_DEPENDENCIES += host-bison host-flex host-kmod
67 # host tools needed for kernel compression
68 ifeq ($(BR2_LINUX_KERNEL_LZ4),y)
69 LINUX_DEPENDENCIES += host-lz4
70 else ifeq ($(BR2_LINUX_KERNEL_LZMA),y)
71 LINUX_DEPENDENCIES += host-lzma
72 else ifeq ($(BR2_LINUX_KERNEL_LZO),y)
73 LINUX_DEPENDENCIES += host-lzop
74 else ifeq ($(BR2_LINUX_KERNEL_XZ),y)
75 LINUX_DEPENDENCIES += host-xz
77 LINUX_COMPRESSION_OPT_$(BR2_LINUX_KERNEL_GZIP) += CONFIG_KERNEL_GZIP
78 LINUX_COMPRESSION_OPT_$(BR2_LINUX_KERNEL_LZ4) += CONFIG_KERNEL_LZ4
79 LINUX_COMPRESSION_OPT_$(BR2_LINUX_KERNEL_LZMA) += CONFIG_KERNEL_LZMA
80 LINUX_COMPRESSION_OPT_$(BR2_LINUX_KERNEL_LZO) += CONFIG_KERNEL_LZO
81 LINUX_COMPRESSION_OPT_$(BR2_LINUX_KERNEL_XZ) += CONFIG_KERNEL_XZ
83 ifeq ($(BR2_LINUX_KERNEL_NEEDS_HOST_OPENSSL),y)
84 LINUX_DEPENDENCIES += host-openssl
87 ifeq ($(BR2_LINUX_KERNEL_NEEDS_HOST_LIBELF),y)
88 LINUX_DEPENDENCIES += host-elfutils
91 # If host-uboot-tools is selected by the user, assume it is needed to
92 # create a custom image
93 ifeq ($(BR2_PACKAGE_HOST_UBOOT_TOOLS),y)
94 LINUX_DEPENDENCIES += host-uboot-tools
97 ifneq ($(ARCH_XTENSA_OVERLAY_FILE),)
98 define LINUX_XTENSA_OVERLAY_EXTRACT
99 $(call arch-xtensa-overlay-extract,$(@D),linux)
101 LINUX_POST_EXTRACT_HOOKS += LINUX_XTENSA_OVERLAY_EXTRACT
102 LINUX_EXTRA_DOWNLOADS += $(ARCH_XTENSA_OVERLAY_URL)
106 HOSTCC="$(HOSTCC) $(HOST_CFLAGS) $(HOST_LDFLAGS)" \
107 ARCH=$(KERNEL_ARCH) \
108 INSTALL_MOD_PATH=$(TARGET_DIR) \
109 CROSS_COMPILE="$(TARGET_CROSS)" \
110 DEPMOD=$(HOST_DIR)/sbin/depmod
114 BR_BINARIES_DIR=$(BINARIES_DIR)
116 ifeq ($(BR2_REPRODUCIBLE),y)
118 KBUILD_BUILD_VERSION=1 \
119 KBUILD_BUILD_USER=buildroot \
120 KBUILD_BUILD_HOST=buildroot \
121 KBUILD_BUILD_TIMESTAMP="$(shell LC_ALL=C date -d @$(SOURCE_DATE_EPOCH))"
124 # Get the real Linux version, which tells us where kernel modules are
125 # going to be installed in the target filesystem.
126 LINUX_VERSION_PROBED = `$(MAKE) $(LINUX_MAKE_FLAGS) -C $(LINUX_DIR) --no-print-directory -s kernelrelease 2>/dev/null`
128 LINUX_DTS_NAME += $(call qstrip,$(BR2_LINUX_KERNEL_INTREE_DTS_NAME))
130 # We keep only the .dts files, so that the user can specify both .dts
131 # and .dtsi files in BR2_LINUX_KERNEL_CUSTOM_DTS_PATH. Both will be
132 # copied to arch/<arch>/boot/dts, but only the .dts files will
133 # actually be generated as .dtb.
134 LINUX_DTS_NAME += $(basename $(filter %.dts,$(notdir $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_DTS_PATH)))))
136 LINUX_DTBS = $(addsuffix .dtb,$(LINUX_DTS_NAME))
138 ifeq ($(BR2_LINUX_KERNEL_IMAGE_TARGET_CUSTOM),y)
139 LINUX_IMAGE_NAME = $(call qstrip,$(BR2_LINUX_KERNEL_IMAGE_NAME))
140 LINUX_TARGET_NAME = $(call qstrip,$(BR2_LINUX_KERNEL_IMAGE_TARGET_NAME))
141 ifeq ($(LINUX_IMAGE_NAME),)
142 LINUX_IMAGE_NAME = $(LINUX_TARGET_NAME)
145 ifeq ($(BR2_LINUX_KERNEL_UIMAGE),y)
146 LINUX_IMAGE_NAME = uImage
147 else ifeq ($(BR2_LINUX_KERNEL_APPENDED_UIMAGE),y)
148 LINUX_IMAGE_NAME = uImage
149 else ifeq ($(BR2_LINUX_KERNEL_BZIMAGE),y)
150 LINUX_IMAGE_NAME = bzImage
151 else ifeq ($(BR2_LINUX_KERNEL_ZIMAGE),y)
152 LINUX_IMAGE_NAME = zImage
153 else ifeq ($(BR2_LINUX_KERNEL_ZIMAGE_EPAPR),y)
154 LINUX_IMAGE_NAME = zImage.epapr
155 else ifeq ($(BR2_LINUX_KERNEL_APPENDED_ZIMAGE),y)
156 LINUX_IMAGE_NAME = zImage
157 else ifeq ($(BR2_LINUX_KERNEL_CUIMAGE),y)
158 LINUX_IMAGE_NAME = cuImage.$(firstword $(LINUX_DTS_NAME))
159 else ifeq ($(BR2_LINUX_KERNEL_SIMPLEIMAGE),y)
160 LINUX_IMAGE_NAME = simpleImage.$(firstword $(LINUX_DTS_NAME))
161 else ifeq ($(BR2_LINUX_KERNEL_IMAGE),y)
162 LINUX_IMAGE_NAME = Image
163 else ifeq ($(BR2_LINUX_KERNEL_LINUX_BIN),y)
164 LINUX_IMAGE_NAME = linux.bin
165 else ifeq ($(BR2_LINUX_KERNEL_VMLINUX_BIN),y)
166 LINUX_IMAGE_NAME = vmlinux.bin
167 else ifeq ($(BR2_LINUX_KERNEL_VMLINUX),y)
168 LINUX_IMAGE_NAME = vmlinux
169 else ifeq ($(BR2_LINUX_KERNEL_VMLINUZ),y)
170 LINUX_IMAGE_NAME = vmlinuz
171 else ifeq ($(BR2_LINUX_KERNEL_VMLINUZ_BIN),y)
172 LINUX_IMAGE_NAME = vmlinuz.bin
174 # The if-else blocks above are all the image types we know of, and all
175 # come from a Kconfig choice, so we know we have LINUX_IMAGE_NAME set
177 LINUX_TARGET_NAME = $(LINUX_IMAGE_NAME)
180 LINUX_KERNEL_UIMAGE_LOADADDR = $(call qstrip,$(BR2_LINUX_KERNEL_UIMAGE_LOADADDR))
181 ifneq ($(LINUX_KERNEL_UIMAGE_LOADADDR),)
182 LINUX_MAKE_FLAGS += LOADADDR="$(LINUX_KERNEL_UIMAGE_LOADADDR)"
185 # Compute the arch path, since i386 and x86_64 are in arch/x86 and not
186 # in arch/$(KERNEL_ARCH). Even if the kernel creates symbolic links
187 # for bzImage, arch/i386 and arch/x86_64 do not exist when copying the
189 ifeq ($(KERNEL_ARCH),i386)
190 LINUX_ARCH_PATH = $(LINUX_DIR)/arch/x86
191 else ifeq ($(KERNEL_ARCH),x86_64)
192 LINUX_ARCH_PATH = $(LINUX_DIR)/arch/x86
194 LINUX_ARCH_PATH = $(LINUX_DIR)/arch/$(KERNEL_ARCH)
197 ifeq ($(BR2_LINUX_KERNEL_VMLINUX),y)
198 LINUX_IMAGE_PATH = $(LINUX_DIR)/$(LINUX_IMAGE_NAME)
199 else ifeq ($(BR2_LINUX_KERNEL_VMLINUZ),y)
200 LINUX_IMAGE_PATH = $(LINUX_DIR)/$(LINUX_IMAGE_NAME)
201 else ifeq ($(BR2_LINUX_KERNEL_VMLINUZ_BIN),y)
202 LINUX_IMAGE_PATH = $(LINUX_DIR)/$(LINUX_IMAGE_NAME)
204 LINUX_IMAGE_PATH = $(LINUX_ARCH_PATH)/boot/$(LINUX_IMAGE_NAME)
205 endif # BR2_LINUX_KERNEL_VMLINUX
207 define LINUX_APPLY_LOCAL_PATCHES
208 for p in $(filter-out ftp://% http://% https://%,$(LINUX_PATCHES)) ; do \
209 if test -d $$p ; then \
210 $(APPLY_PATCHES) $(@D) $$p \*.patch || exit 1 ; \
212 $(APPLY_PATCHES) $(@D) `dirname $$p` `basename $$p` || exit 1; \
217 LINUX_POST_PATCH_HOOKS += LINUX_APPLY_LOCAL_PATCHES
219 # Older linux kernels use deprecated perl constructs in timeconst.pl
220 # that were removed for perl 5.22+ so it breaks on newer distributions
221 # Try a dry-run patch to see if this applies, if it does go ahead
222 define LINUX_TRY_PATCH_TIMECONST
223 @if patch -p1 --dry-run -f -s -d $(@D) <$(LINUX_PKGDIR)/0001-timeconst.pl-Eliminate-Perl-warning.patch.conditional >/dev/null ; then \
224 $(APPLY_PATCHES) $(@D) $(LINUX_PKGDIR) 0001-timeconst.pl-Eliminate-Perl-warning.patch.conditional ; \
227 LINUX_POST_PATCH_HOOKS += LINUX_TRY_PATCH_TIMECONST
229 ifeq ($(BR2_LINUX_KERNEL_USE_DEFCONFIG),y)
230 LINUX_KCONFIG_DEFCONFIG = $(call qstrip,$(BR2_LINUX_KERNEL_DEFCONFIG))_defconfig
231 else ifeq ($(BR2_LINUX_KERNEL_USE_ARCH_DEFAULT_CONFIG),y)
232 LINUX_KCONFIG_DEFCONFIG = defconfig
233 else ifeq ($(BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG),y)
234 LINUX_KCONFIG_FILE = $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE))
236 LINUX_KCONFIG_FRAGMENT_FILES = $(call qstrip,$(BR2_LINUX_KERNEL_CONFIG_FRAGMENT_FILES))
237 LINUX_KCONFIG_EDITORS = menuconfig xconfig gconfig nconfig
238 LINUX_KCONFIG_OPTS = $(LINUX_MAKE_FLAGS)
240 # If no package has yet set it, set it from the Kconfig option
241 LINUX_NEEDS_MODULES ?= $(BR2_LINUX_NEEDS_MODULES)
243 # Make sure the Linux kernel is built with the right endianness. Not
244 # all architectures support
245 # CONFIG_CPU_BIG_ENDIAN/CONFIG_CPU_LITTLE_ENDIAN in Linux, but the
246 # option will be thrown away and ignored if it doesn't exist.
247 ifeq ($(BR2_ENDIAN),"BIG")
248 define LINUX_FIXUP_CONFIG_ENDIANNESS
249 $(call KCONFIG_ENABLE_OPT,CONFIG_CPU_BIG_ENDIAN,$(@D)/.config)
252 define LINUX_FIXUP_CONFIG_ENDIANNESS
253 $(call KCONFIG_ENABLE_OPT,CONFIG_CPU_LITTLE_ENDIAN,$(@D)/.config)
257 define LINUX_KCONFIG_FIXUP_CMDS
258 $(if $(LINUX_NEEDS_MODULES),
259 $(call KCONFIG_ENABLE_OPT,CONFIG_MODULES,$(@D)/.config))
260 $(call KCONFIG_ENABLE_OPT,$(strip $(LINUX_COMPRESSION_OPT_y)),$(@D)/.config)
261 $(foreach opt, $(LINUX_COMPRESSION_OPT_),
262 $(call KCONFIG_DISABLE_OPT,$(opt),$(@D)/.config)
264 $(LINUX_FIXUP_CONFIG_ENDIANNESS)
265 $(if $(BR2_arm)$(BR2_armeb),
266 $(call KCONFIG_ENABLE_OPT,CONFIG_AEABI,$(@D)/.config))
267 $(if $(BR2_TARGET_ROOTFS_CPIO),
268 $(call KCONFIG_ENABLE_OPT,CONFIG_BLK_DEV_INITRD,$(@D)/.config))
269 # As the kernel gets compiled before root filesystems are
270 # built, we create a fake cpio file. It'll be
271 # replaced later by the real cpio archive, and the kernel will be
272 # rebuilt using the linux-rebuild-with-initramfs target.
273 $(if $(BR2_TARGET_ROOTFS_INITRAMFS),
274 touch $(BINARIES_DIR)/rootfs.cpio
275 $(call KCONFIG_SET_OPT,CONFIG_INITRAMFS_SOURCE,"$${BR_BINARIES_DIR}/rootfs.cpio",$(@D)/.config)
276 $(call KCONFIG_SET_OPT,CONFIG_INITRAMFS_ROOT_UID,0,$(@D)/.config)
277 $(call KCONFIG_SET_OPT,CONFIG_INITRAMFS_ROOT_GID,0,$(@D)/.config))
278 $(if $(BR2_ROOTFS_DEVICE_CREATION_STATIC),,
279 $(call KCONFIG_ENABLE_OPT,CONFIG_DEVTMPFS,$(@D)/.config)
280 $(call KCONFIG_ENABLE_OPT,CONFIG_DEVTMPFS_MOUNT,$(@D)/.config))
281 $(if $(BR2_ROOTFS_DEVICE_CREATION_DYNAMIC_EUDEV),
282 $(call KCONFIG_ENABLE_OPT,CONFIG_INOTIFY_USER,$(@D)/.config))
283 $(if $(BR2_PACKAGE_KTAP),
284 $(call KCONFIG_ENABLE_OPT,CONFIG_DEBUG_FS,$(@D)/.config)
285 $(call KCONFIG_ENABLE_OPT,CONFIG_ENABLE_DEFAULT_TRACERS,$(@D)/.config)
286 $(call KCONFIG_ENABLE_OPT,CONFIG_PERF_EVENTS,$(@D)/.config)
287 $(call KCONFIG_ENABLE_OPT,CONFIG_FUNCTION_TRACER,$(@D)/.config))
288 $(if $(BR2_PACKAGE_SYSTEMD),
289 $(call KCONFIG_ENABLE_OPT,CONFIG_CGROUPS,$(@D)/.config)
290 $(call KCONFIG_ENABLE_OPT,CONFIG_INOTIFY_USER,$(@D)/.config)
291 $(call KCONFIG_ENABLE_OPT,CONFIG_FHANDLE,$(@D)/.config)
292 $(call KCONFIG_ENABLE_OPT,CONFIG_AUTOFS4_FS,$(@D)/.config)
293 $(call KCONFIG_ENABLE_OPT,CONFIG_TMPFS_POSIX_ACL,$(@D)/.config)
294 $(call KCONFIG_ENABLE_OPT,CONFIG_TMPFS_XATTR,$(@D)/.config))
295 $(if $(BR2_PACKAGE_SMACK),
296 $(call KCONFIG_ENABLE_OPT,CONFIG_SECURITY,$(@D)/.config)
297 $(call KCONFIG_ENABLE_OPT,CONFIG_SECURITY_SMACK,$(@D)/.config)
298 $(call KCONFIG_ENABLE_OPT,CONFIG_SECURITY_NETWORK,$(@D)/.config))
299 $(if $(BR2_PACKAGE_SUNXI_MALI_MAINLINE_DRIVER),
300 $(call KCONFIG_ENABLE_OPT,CONFIG_CMA,$(@D)/.config)
301 $(call KCONFIG_ENABLE_OPT,CONFIG_DMA_CMA,$(@D)/.config))
302 $(if $(BR2_PACKAGE_IPTABLES),
303 $(call KCONFIG_ENABLE_OPT,CONFIG_IP_NF_IPTABLES,$(@D)/.config)
304 $(call KCONFIG_ENABLE_OPT,CONFIG_IP_NF_FILTER,$(@D)/.config)
305 $(call KCONFIG_ENABLE_OPT,CONFIG_NETFILTER,$(@D)/.config)
306 $(call KCONFIG_ENABLE_OPT,CONFIG_NETFILTER_XTABLES,$(@D)/.config))
307 $(if $(BR2_PACKAGE_XTABLES_ADDONS),
308 $(call KCONFIG_ENABLE_OPT,CONFIG_NETFILTER_ADVANCED,$(@D)/.config)
309 $(call KCONFIG_ENABLE_OPT,CONFIG_NF_CONNTRACK,$(@D)/.config)
310 $(call KCONFIG_ENABLE_OPT,CONFIG_NF_CONNTRACK_MARK,$(@D)/.config))
311 $(if $(BR2_PACKAGE_WIREGUARD),
312 $(call KCONFIG_ENABLE_OPT,CONFIG_INET,$(@D)/.config)
313 $(call KCONFIG_ENABLE_OPT,CONFIG_NET,$(@D)/.config)
314 $(call KCONFIG_ENABLE_OPT,CONFIG_NET_FOU,$(@D)/.config)
315 $(call KCONFIG_ENABLE_OPT,CONFIG_CRYPTO,$(@D)/.config)
316 $(call KCONFIG_ENABLE_OPT,CONFIG_CRYPTO_MANAGER,$(@D)/.config))
317 $(if $(BR2_LINUX_KERNEL_APPENDED_DTB),
318 $(call KCONFIG_ENABLE_OPT,CONFIG_ARM_APPENDED_DTB,$(@D)/.config))
319 $(if $(BR2_PACKAGE_KERNEL_MODULE_IMX_GPU_VIV),
320 $(call KCONFIG_DISABLE_OPT,CONFIG_MXC_GPU_VIV,$(@D)/.config))
323 ifeq ($(BR2_LINUX_KERNEL_DTS_SUPPORT),y)
324 ifeq ($(BR2_LINUX_KERNEL_DTB_IS_SELF_BUILT),)
325 define LINUX_BUILD_DTB
326 $(LINUX_MAKE_ENV) $(MAKE) $(LINUX_MAKE_FLAGS) -C $(@D) $(LINUX_DTBS)
328 ifeq ($(BR2_LINUX_KERNEL_APPENDED_DTB),)
329 define LINUX_INSTALL_DTB
330 # dtbs moved from arch/<ARCH>/boot to arch/<ARCH>/boot/dts since 3.8-rc1
332 $(LINUX_ARCH_PATH)/boot/$(if $(wildcard \
333 $(addprefix $(LINUX_ARCH_PATH)/boot/dts/,$(LINUX_DTBS))),dts/),$(LINUX_DTBS)) \
336 endif # BR2_LINUX_KERNEL_APPENDED_DTB
337 endif # BR2_LINUX_KERNEL_DTB_IS_SELF_BUILT
338 endif # BR2_LINUX_KERNEL_DTS_SUPPORT
340 ifeq ($(BR2_LINUX_KERNEL_APPENDED_DTB),y)
341 # dtbs moved from arch/$ARCH/boot to arch/$ARCH/boot/dts since 3.8-rc1
342 define LINUX_APPEND_DTB
343 (cd $(LINUX_ARCH_PATH)/boot; \
344 for dtb in $(LINUX_DTS_NAME); do \
345 if test -e $${dtb}.dtb ; then \
346 dtbpath=$${dtb}.dtb ; \
348 dtbpath=dts/$${dtb}.dtb ; \
350 cat zImage $${dtbpath} > zImage.$${dtb} || exit 1; \
353 ifeq ($(BR2_LINUX_KERNEL_APPENDED_UIMAGE),y)
354 # We need to generate a new u-boot image that takes into
355 # account the extra-size added by the device tree at the end
356 # of the image. To do so, we first need to retrieve both load
357 # address and entry point for the kernel from the already
358 # generate uboot image before using mkimage -l.
359 LINUX_APPEND_DTB += ; \
360 MKIMAGE_ARGS=`$(MKIMAGE) -l $(LINUX_IMAGE_PATH) |\
361 sed -n -e 's/Image Name:[ ]*\(.*\)/-n \1/p' -e 's/Load Address:/-a/p' -e 's/Entry Point:/-e/p'`; \
362 for dtb in $(LINUX_DTS_NAME); do \
363 $(MKIMAGE) -A $(MKIMAGE_ARCH) -O linux \
364 -T kernel -C none $${MKIMAGE_ARGS} \
365 -d $(LINUX_ARCH_PATH)/boot/zImage.$${dtb} $(LINUX_IMAGE_PATH).$${dtb}; \
370 # Compilation. We make sure the kernel gets rebuilt when the
371 # configuration has changed.
372 define LINUX_BUILD_CMDS
373 @for dts in $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_DTS_PATH)); do \
374 cp -f $${dts} $(LINUX_ARCH_PATH)/boot/dts/ ; \
376 $(LINUX_MAKE_ENV) $(MAKE) $(LINUX_MAKE_FLAGS) -C $(@D) $(LINUX_TARGET_NAME)
377 @if grep -q "CONFIG_MODULES=y" $(@D)/.config; then \
378 $(LINUX_MAKE_ENV) $(MAKE) $(LINUX_MAKE_FLAGS) -C $(@D) modules ; \
384 ifeq ($(BR2_LINUX_KERNEL_APPENDED_DTB),y)
385 # When a DTB was appended, install the potential several images with
387 define LINUX_INSTALL_IMAGE
389 cp $(LINUX_ARCH_PATH)/boot/$(LINUX_IMAGE_NAME).* $(1)
392 # Otherwise, just install the unique image generated by the kernel
394 define LINUX_INSTALL_IMAGE
395 $(INSTALL) -m 0644 -D $(LINUX_IMAGE_PATH) $(1)/$(LINUX_IMAGE_NAME)
399 ifeq ($(BR2_LINUX_KERNEL_INSTALL_TARGET),y)
400 define LINUX_INSTALL_KERNEL_IMAGE_TO_TARGET
401 $(call LINUX_INSTALL_IMAGE,$(TARGET_DIR)/boot)
402 $(call LINUX_INSTALL_DTB,$(TARGET_DIR)/boot)
406 define LINUX_INSTALL_HOST_TOOLS
407 # Installing dtc (device tree compiler) as host tool, if selected
408 if grep -q "CONFIG_DTC=y" $(@D)/.config; then \
409 $(INSTALL) -D -m 0755 $(@D)/scripts/dtc/dtc $(HOST_DIR)/bin/linux-dtc ; \
410 if [ ! -e $(HOST_DIR)/bin/dtc ]; then \
411 ln -sf linux-dtc $(HOST_DIR)/bin/dtc ; \
416 define LINUX_INSTALL_IMAGES_CMDS
417 $(call LINUX_INSTALL_IMAGE,$(BINARIES_DIR))
418 $(call LINUX_INSTALL_DTB,$(BINARIES_DIR))
421 ifeq ($(BR2_STRIP_strip),y)
422 LINUX_MAKE_FLAGS += INSTALL_MOD_STRIP=1
425 define LINUX_INSTALL_TARGET_CMDS
426 $(LINUX_INSTALL_KERNEL_IMAGE_TO_TARGET)
427 # Install modules and remove symbolic links pointing to build
428 # directories, not relevant on the target
429 @if grep -q "CONFIG_MODULES=y" $(@D)/.config; then \
430 $(LINUX_MAKE_ENV) $(MAKE1) $(LINUX_MAKE_FLAGS) -C $(@D) modules_install; \
431 rm -f $(TARGET_DIR)/lib/modules/$(LINUX_VERSION_PROBED)/build ; \
432 rm -f $(TARGET_DIR)/lib/modules/$(LINUX_VERSION_PROBED)/source ; \
434 $(LINUX_INSTALL_HOST_TOOLS)
437 # Include all our extensions.
439 # Note: our package infrastructure uses the full-path of the last-scanned
440 # Makefile to determine what package we're currently defining, using the
441 # last directory component in the path. As such, including other Makefile,
442 # like below, before we call one of the *-package macro is usally not
444 # However, since the files we include here are in the same directory as
445 # the current Makefile, we are OK. But this is a hard requirement: files
446 # included here *must* be in the same directory!
447 include $(sort $(wildcard linux/linux-ext-*.mk))
449 LINUX_PATCH_DEPENDENCIES += $(foreach ext,$(LINUX_EXTENSIONS),\
450 $(if $(BR2_LINUX_KERNEL_EXT_$(call UPPERCASE,$(ext))),$(ext)))
452 LINUX_PRE_PATCH_HOOKS += $(foreach ext,$(LINUX_EXTENSIONS),\
453 $(if $(BR2_LINUX_KERNEL_EXT_$(call UPPERCASE,$(ext))),\
454 $(call UPPERCASE,$(ext))_PREPARE_KERNEL))
456 # Checks to give errors that the user can understand
458 # When a custom repository has been set, check for the repository version
459 ifeq ($(BR2_LINUX_KERNEL_CUSTOM_SVN)$(BR2_LINUX_KERNEL_CUSTOM_GIT)$(BR2_LINUX_KERNEL_CUSTOM_HG),y)
460 ifeq ($(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_REPO_VERSION)),)
461 $(error No custom repository version set. Check your BR2_LINUX_KERNEL_CUSTOM_REPO_VERSION setting)
463 ifeq ($(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_REPO_URL)),)
464 $(error No custom repo URL set. Check your BR2_LINUX_KERNEL_CUSTOM_REPO_URL setting)
468 ifeq ($(BR_BUILDING),y)
470 ifeq ($(BR2_LINUX_KERNEL_USE_DEFCONFIG),y)
471 # We must use the user-supplied kconfig value, because
472 # LINUX_KCONFIG_DEFCONFIG will at least contain the
473 # trailing _defconfig
474 ifeq ($(call qstrip,$(BR2_LINUX_KERNEL_DEFCONFIG)),)
475 $(error No kernel defconfig name specified, check your BR2_LINUX_KERNEL_DEFCONFIG setting)
479 ifeq ($(BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG),y)
480 ifeq ($(LINUX_KCONFIG_FILE),)
481 $(error No kernel configuration file specified, check your BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE setting)
485 ifeq ($(BR2_LINUX_KERNEL_DTS_SUPPORT):$(strip $(LINUX_DTS_NAME)),y:)
486 $(error No kernel device tree source specified, check your \
487 BR2_LINUX_KERNEL_INTREE_DTS_NAME / BR2_LINUX_KERNEL_CUSTOM_DTS_PATH settings)
492 $(eval $(kconfig-package))
494 # Support for rebuilding the kernel after the cpio archive has
496 .PHONY: linux-rebuild-with-initramfs
497 linux-rebuild-with-initramfs: $(LINUX_DIR)/.stamp_target_installed
498 linux-rebuild-with-initramfs: $(LINUX_DIR)/.stamp_images_installed
499 linux-rebuild-with-initramfs: rootfs-cpio
500 linux-rebuild-with-initramfs:
501 @$(call MESSAGE,"Rebuilding kernel with initramfs")
503 $(LINUX_MAKE_ENV) $(MAKE) $(LINUX_MAKE_FLAGS) -C $(LINUX_DIR) $(LINUX_TARGET_NAME)
505 # Copy the kernel image(s) to its(their) final destination
506 $(call LINUX_INSTALL_IMAGE,$(BINARIES_DIR))
507 # If there is a .ub file copy it to the final destination
508 test ! -f $(LINUX_IMAGE_PATH).ub || cp $(LINUX_IMAGE_PATH).ub $(BINARIES_DIR)