include/kernel.mk

   1 #
   2 # Copyright (C) 2006-2015 OpenWrt.org
   3 #
   4 # This is free software, licensed under the GNU General Public License v2.
   5 # See /LICENSE for more information.
   6 #
   7
   8 ifneq ($(filter check,$(MAKECMDGOALS)),)
   9 CHECK:=1
  10 DUMP:=1
  11 endif
  12
  13 ifneq ($(SOURCE_DATE_EPOCH),)
  14   ifndef DUMP
  15     KBUILD_BUILD_TIMESTAMP:=$(shell perl -e 'print scalar gmtime($(SOURCE_DATE_EPOCH))')
  16   endif
  17 endif
  18
  19 ifeq ($(__target_inc),)
  20   ifndef CHECK
  21     include $(INCLUDE_DIR)/target.mk
  22   endif
  23 endif
  24
  25 ifeq ($(DUMP),1)
  26   KERNEL?=<KERNEL>
  27   BOARD?=<BOARD>
  28   LINUX_VERSION?=<LINUX_VERSION>
  29   LINUX_VERMAGIC?=<LINUX_VERMAGIC>
  30 else
  31   ifeq ($(CONFIG_EXTERNAL_TOOLCHAIN),)
  32     export GCC_HONOUR_COPTS=s
  33   endif
  34
  35   LINUX_KMOD_SUFFIX=ko
  36
  37   ifneq (,$(findstring uml,$(BOARD)))
  38     KERNEL_CC?=$(HOSTCC)
  39     KERNEL_CROSS?=
  40   else
  41     KERNEL_CC?=$(TARGET_CC)
  42     KERNEL_CROSS?=$(TARGET_CROSS)
  43   endif
  44
  45   ifeq ($(TARGET_BUILD),1)
  46     PATCH_DIR ?= $(CURDIR)/patches$(if $(wildcard ./patches-$(KERNEL_PATCHVER)),-$(KERNEL_PATCHVER))
  47     FILES_DIR ?= $(foreach dir,$(wildcard $(CURDIR)/files $(CURDIR)/files-$(KERNEL_PATCHVER)),"$(dir)")
  48   endif
  49   KERNEL_BUILD_DIR ?= $(BUILD_DIR)/linux-$(BOARD)$(if $(SUBTARGET),_$(SUBTARGET))
  50   LINUX_DIR ?= $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION)
  51   LINUX_UAPI_DIR=uapi/
  52   LINUX_VERMAGIC:=$(strip $(shell cat $(LINUX_DIR)/.vermagic 2>/dev/null))
  53   LINUX_VERMAGIC:=$(if $(LINUX_VERMAGIC),$(LINUX_VERMAGIC),unknown)
  54
  55   LINUX_UNAME_VERSION:=$(KERNEL_BASE)
  56   ifneq ($(findstring -rc,$(LINUX_VERSION)),)
  57     LINUX_UNAME_VERSION:=$(LINUX_UNAME_VERSION)-$(strip $(lastword $(subst -, ,$(LINUX_VERSION))))
  58   endif
  59
  60   LINUX_KERNEL:=$(KERNEL_BUILD_DIR)/vmlinux
  61
  62   LINUX_SOURCE:=linux-$(LINUX_VERSION).tar.xz
  63   TESTING:=$(if $(findstring -rc,$(LINUX_VERSION)),/testing,)
  64   ifeq ($(call qstrip,$(CONFIG_EXTERNAL_KERNEL_TREE))$(call qstrip,$(CONFIG_KERNEL_GIT_CLONE_URI)),)
  65       LINUX_SITE:=@KERNEL/linux/kernel/v$(word 1,$(subst ., ,$(KERNEL_BASE))).x$(TESTING)
  66   else
  67       LINUX_UNAME_VERSION:=$(strip $(shell cat $(LINUX_DIR)/include/config/kernel.release 2>/dev/null))
  68   endif
  69
  70   MODULES_SUBDIR:=lib/modules/$(LINUX_UNAME_VERSION)
  71   TARGET_MODULES_DIR:=$(LINUX_TARGET_DIR)/$(MODULES_SUBDIR)
  72
  73   ifneq ($(TARGET_BUILD),1)
  74     PKG_BUILD_DIR ?= $(KERNEL_BUILD_DIR)/$(PKG_NAME)$(if $(PKG_VERSION),-$(PKG_VERSION))
  75   endif
  76 endif
  77
  78 ifneq (,$(findstring uml,$(BOARD)))
  79   LINUX_KARCH=um
  80 else ifneq (,$(findstring $(ARCH) , aarch64 aarch64_be ))
  81   LINUX_KARCH := arm64
  82 else ifneq (,$(findstring $(ARCH) , arceb ))
  83   LINUX_KARCH := arc
  84 else ifneq (,$(findstring $(ARCH) , armeb ))
  85   LINUX_KARCH := arm
  86 else ifneq (,$(findstring $(ARCH) , mipsel mips64 mips64el ))
  87   LINUX_KARCH := mips
  88 else ifneq (,$(findstring $(ARCH) , powerpc64 ))
  89   LINUX_KARCH := powerpc
  90 else ifneq (,$(findstring $(ARCH) , sh2 sh3 sh4 ))
  91   LINUX_KARCH := sh
  92 else ifneq (,$(findstring $(ARCH) , i386 x86_64 ))
  93   LINUX_KARCH := x86
  94 else
  95   LINUX_KARCH := $(ARCH)
  96 endif
  97
  98 KERNEL_MAKE = $(MAKE) $(KERNEL_MAKEOPTS)
  99
 100 KERNEL_MAKE_FLAGS := \
 101         HOSTCFLAGS="$(HOST_CFLAGS) -Wall -Wmissing-prototypes -Wstrict-prototypes" \
 102         CROSS_COMPILE="$(KERNEL_CROSS)" \
 103         ARCH="$(LINUX_KARCH)" \
 104         KBUILD_HAVE_NLS=no \
 105         KBUILD_BUILD_USER="$(call qstrip,$(CONFIG_KERNEL_BUILD_USER))" \
 106         KBUILD_BUILD_HOST="$(call qstrip,$(CONFIG_KERNEL_BUILD_DOMAIN))" \
 107         KBUILD_BUILD_TIMESTAMP="$(KBUILD_BUILD_TIMESTAMP)" \
 108         KBUILD_BUILD_VERSION="0" \
 109         HOST_LOADLIBES="-L$(STAGING_DIR_HOST)/lib" \
 110         CONFIG_SHELL="$(BASH)" \
 111         $(if $(findstring c,$(OPENWRT_VERBOSE)),V=1,V='') \
 112         $(if $(PKG_BUILD_ID),LDFLAGS_MODULE=--build-id=0x$(PKG_BUILD_ID)) \
 113         cmd_syscalls=
 114
 115 ifeq ($(call qstrip,$(CONFIG_EXTERNAL_KERNEL_TREE))$(call qstrip,$(CONFIG_KERNEL_GIT_CLONE_URI)),)
 116   KERNEL_MAKE_FLAGS += \
 117         KERNELRELEASE=$(LINUX_VERSION)
 118 endif
 119
 120 KERNEL_MAKEOPTS := -C $(LINUX_DIR) $(KERNEL_MAKE_FLAGS)
 121
 122 ifdef CONFIG_USE_SPARSE
 123   KERNEL_MAKEOPTS += C=1 CHECK=$(STAGING_DIR_HOST)/bin/sparse
 124 endif
 125
 126 PKG_EXTMOD_SUBDIRS ?= .
 127
 128 define populate_module_symvers
 129         @mkdir -p $(PKG_INFO_DIR)
 130         cat /dev/null > $(PKG_INFO_DIR)/$(PKG_NAME).symvers; \
 131         for subdir in $(PKG_EXTMOD_SUBDIRS); do \
 132                 cat $(PKG_INFO_DIR)/*.symvers 2>/dev/null > $(PKG_BUILD_DIR)/$$$$subdir/Module.symvers; \
 133         done
 134 endef
 135
 136 define collect_module_symvers
 137         for subdir in $(PKG_EXTMOD_SUBDIRS); do \
 138                 grep -F $$$$(readlink -f $(PKG_BUILD_DIR)) $(PKG_BUILD_DIR)/$$$$subdir/Module.symvers >> $(PKG_BUILD_DIR)/Module.symvers.tmp; \
 139         done; \
 140         sort -u $(PKG_BUILD_DIR)/Module.symvers.tmp > $(PKG_BUILD_DIR)/Module.symvers; \
 141         mv $(PKG_BUILD_DIR)/Module.symvers $(PKG_INFO_DIR)/$(PKG_NAME).symvers
 142 endef
 143
 144 define KernelPackage/hooks
 145   ifneq ($(PKG_NAME),kernel)
 146     Hooks/Compile/Pre += populate_module_symvers
 147     Hooks/Compile/Post += collect_module_symvers
 148   endif
 149   define KernelPackage/hooks
 150   endef
 151 endef
 152
 153 define KernelPackage/Defaults
 154   FILES:=
 155   AUTOLOAD:=
 156   MODPARAMS:=
 157   PKGFLAGS+=nonshared
 158 endef
 159
 160 # 1: name
 161 # 2: install prefix
 162 # 3: module priority prefix
 163 # 4: required for boot
 164 # 5: module list
 165 define ModuleAutoLoad
 166   $(if $(5), \
 167     mkdir -p $(2)/etc/modules.d; \
 168     ($(foreach mod,$(5), \
 169       echo "$(mod)$(if $(MODPARAMS.$(mod)), $(MODPARAMS.$(mod)),$(if $(MODPARAMS), $(MODPARAMS)))"; )) > $(2)/etc/modules.d/$(3)$(1); \
 170     $(if $(4), \
 171       mkdir -p $(2)/etc/modules-boot.d; \
 172       ln -sf ../modules.d/$(3)$(1) $(2)/etc/modules-boot.d/;))
 173 endef
 174
 175 ifeq ($(DUMP)$(TARGET_BUILD),)
 176   -include $(LINUX_DIR)/.config
 177 endif
 178
 179 define KernelPackage/depends
 180   $(STAMP_BUILT): $(LINUX_DIR)/.config
 181   define KernelPackage/depends
 182   endef
 183 endef
 184
 185 define KernelPackage
 186   NAME:=$(1)
 187   $(eval $(call Package/Default))
 188   $(eval $(call KernelPackage/Defaults))
 189   $(eval $(call KernelPackage/$(1)))
 190   $(eval $(call KernelPackage/$(1)/$(BOARD)))
 191   $(eval $(call KernelPackage/$(1)/$(BOARD)/$(if $(SUBTARGET),$(SUBTARGET),generic)))
 192
 193   define Package/kmod-$(1)
 194     TITLE:=$(TITLE)
 195     SECTION:=kernel
 196     CATEGORY:=Kernel modules
 197     DESCRIPTION:=$(DESCRIPTION)
 198     EXTRA_DEPENDS:=kernel (=$(LINUX_VERSION)-$(LINUX_RELEASE)-$(LINUX_VERMAGIC))
 199     VERSION:=$(LINUX_VERSION)$(if $(PKG_VERSION),+$(PKG_VERSION))-$(if $(PKG_RELEASE),$(PKG_RELEASE),$(LINUX_RELEASE))
 200     PKGFLAGS:=$(PKGFLAGS)
 201     $(call KernelPackage/$(1))
 202     $(call KernelPackage/$(1)/$(BOARD))
 203     $(call KernelPackage/$(1)/$(BOARD)/$(if $(SUBTARGET),$(SUBTARGET),generic))
 204   endef
 205
 206   ifdef KernelPackage/$(1)/conffiles
 207     define Package/kmod-$(1)/conffiles
 208 $(call KernelPackage/$(1)/conffiles)
 209     endef
 210   endif
 211
 212   ifdef KernelPackage/$(1)/description
 213     define Package/kmod-$(1)/description
 214 $(call KernelPackage/$(1)/description)
 215     endef
 216   endif
 217
 218   ifdef KernelPackage/$(1)/config
 219     define Package/kmod-$(1)/config
 220 $(call KernelPackage/$(1)/config)
 221     endef
 222   endif
 223
 224   $(call KernelPackage/depends)
 225   $(call KernelPackage/hooks)
 226
 227   ifneq ($(if $(filter-out %=y %=n %=m,$(KCONFIG)),$(filter m y,$(foreach c,$(filter-out %=y %=n %=m,$(KCONFIG)),$($(c)))),.),)
 228     define Package/kmod-$(1)/install
 229                   @for mod in $$(call version_filter,$$(FILES)); do \
 230                         if grep -q "$$$$$$$${mod##$(LINUX_DIR)/}" "$(LINUX_DIR)/modules.builtin"; then \
 231                                 echo "NOTICE: module '$$$$$$$$mod' is built-in."; \
 232                         elif [ -e $$$$$$$$mod ]; then \
 233                                 mkdir -p $$(1)/$(MODULES_SUBDIR) ; \
 234                                 $(CP) -L $$$$$$$$mod $$(1)/$(MODULES_SUBDIR)/ ; \
 235                         else \
 236                                 echo "ERROR: module '$$$$$$$$mod' is missing." >&2; \
 237                                 exit 1; \
 238                         fi; \
 239                   done;
 240                   $(call ModuleAutoLoad,$(1),$$(1),$(filter-out 0-,$(word 1,$(AUTOLOAD))-),$(filter-out 0,$(word 2,$(AUTOLOAD))),$(wordlist 3,99,$(AUTOLOAD)))
 241                   $(call KernelPackage/$(1)/install,$$(1))
 242     endef
 243   $(if $(CONFIG_PACKAGE_kmod-$(1)),
 244     else
 245       compile: $(1)-disabled
 246       $(1)-disabled:
 247                 @echo "WARNING: kmod-$(1) is not available in the kernel config - generating empty package" >&2
 248
 249       define Package/kmod-$(1)/install
 250                 true
 251       endef
 252   )
 253   endif
 254   $$(eval $$(call BuildPackage,kmod-$(1)))
 255
 256   $$(IPKG_kmod-$(1)): $$(wildcard $$(FILES))
 257 endef
 258
 259 version_filter=$(if $(findstring @,$(1)),$(shell $(SCRIPT_DIR)/package-metadata.pl version_filter $(KERNEL_PATCHVER) $(1)),$(1))
 260
 261 # 1: priority (optional)
 262 # 2: module list
 263 # 3: boot flag
 264 define AutoLoad
 265   $(if $(1),$(1),0) $(if $(3),1,0) $(call version_filter,$(2))
 266 endef
 267
 268 # 1: module list
 269 # 2: boot flag
 270 define AutoProbe
 271   $(call AutoLoad,,$(1),$(2))
 272 endef
 273
 274 version_field=$(if $(word $(1),$(2)),$(word $(1),$(2)),0)
 275 kernel_version_merge=$$(( ($(call version_field,1,$(1)) << 24) + ($(call version_field,2,$(1)) << 16) + ($(call version_field,3,$(1)) << 8) + $(call version_field,4,$(1)) ))
 276
 277 ifdef DUMP
 278   kernel_version_cmp=
 279 else
 280   kernel_version_cmp=$(shell [ $(call kernel_version_merge,$(call split_version,$(2))) $(1) $(call kernel_version_merge,$(call split_version,$(3))) ] && echo 1 )
 281 endif
 282
 283 CompareKernelPatchVer=$(if $(call kernel_version_cmp,-$(2),$(1),$(3)),1,0)
 284
 285 kernel_patchver_gt=$(call kernel_version_cmp,-gt,$(KERNEL_PATCHVER),$(1))
 286 kernel_patchver_ge=$(call kernel_version_cmp,-ge,$(KERNEL_PATCHVER),$(1))
 287 kernel_patchver_eq=$(call kernel_version_cmp,-eq,$(KERNEL_PATCHVER),$(1))
 288 kernel_patchver_le=$(call kernel_version_cmp,-le,$(KERNEL_PATCHVER),$(1))
 289 kernel_patchver_lt=$(call kernel_version_cmp,-lt,$(KERNEL_PATCHVER),$(1))
 290