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:=$(if $(word 3,$(subst ., ,$(KERNEL_BASE))),$(KERNEL_BASE),$(KERNEL_BASE).0)
  56   ifneq ($(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)/$$$$subdir/Module.symvers; \
 133         done
 134 endef
 135
 136 define collect_module_symvers
 137         for subdir in $(PKG_EXTMOD_SUBDIRS); do \
 138                 grep -F $(PKG_BUILD_DIR) $(PKG_BUILD_DIR)/$$$$subdir/Module.symvers >> $(PKG_BUILD_DIR)/Module.symvers.tmp; \
 139         done; \
 140         sort -u $(PKG_BUILD_DIR)/Module.symvers.tmp > $(PKG_BUILD_DIR)/Module.symvers; \
 141         mv $(PKG_BUILD_DIR)/Module.symvers $(PKG_INFO_DIR)/$(PKG_NAME).symvers
 142 endef
 143
 144 define KernelPackage/hooks
 145   ifneq ($(PKG_NAME),kernel)
 146     Hooks/Compile/Pre += populate_module_symvers
 147     Hooks/Compile/Post += collect_module_symvers
 148   endif
 149   define KernelPackage/hooks
 150   endef
 151 endef
 152
 153 define KernelPackage/Defaults
 154   FILES:=
 155   AUTOLOAD:=
 156   PKGFLAGS+=nonshared
 157 endef
 158
 159 define ModuleAutoLoad
 160         $(SH_FUNC) \
 161         export modules=; \
 162         probe_module() { \
 163                 local mods="$$$$$$$$1"; \
 164                 local boot="$$$$$$$$2"; \
 165                 local mod; \
 166                 shift 2; \
 167                 for mod in $$$$$$$$mods; do \
 168                         mkdir -p $(2)/etc/modules.d; \
 169                         echo "$$$$$$$$mod" >> $(2)/etc/modules.d/$(1); \
 170                 done; \
 171                 if [ -e $(2)/etc/modules.d/$(1) ]; then \
 172                         if [ "$$$$$$$$boot" = "1" -a ! -e $(2)/etc/modules-boot.d/$(1) ]; then \
 173                                 mkdir -p $(2)/etc/modules-boot.d; \
 174                                 ln -s ../modules.d/$(1) $(2)/etc/modules-boot.d/; \
 175                         fi; \
 176                         modules="$$$$$$$${modules:+$$$$$$$$modules }$$$$$$$$mods"; \
 177                 fi; \
 178         }; \
 179         add_module() { \
 180                 local priority="$$$$$$$$1"; \
 181                 local mods="$$$$$$$$2"; \
 182                 local boot="$$$$$$$$3"; \
 183                 local mod; \
 184                 shift 3; \
 185                 for mod in $$$$$$$$mods; do \
 186                         mkdir -p $(2)/etc/modules.d; \
 187                         echo "$$$$$$$$mod" >> $(2)/etc/modules.d/$$$$$$$$priority-$(1); \
 188                 done; \
 189                 if [ -e $(2)/etc/modules.d/$$$$$$$$priority-$(1) ]; then \
 190                         if [ "$$$$$$$$boot" = "1" -a ! -e $(2)/etc/modules-boot.d/$$$$$$$$priority-$(1) ]; then \
 191                                 mkdir -p $(2)/etc/modules-boot.d; \
 192                                 ln -s ../modules.d/$$$$$$$$priority-$(1) $(2)/etc/modules-boot.d/; \
 193                         fi; \
 194                         modules="$$$$$$$${modules:+$$$$$$$$modules }$$$$$$$$priority-$(1)"; \
 195                 fi; \
 196         }; \
 197         $(3) \
 198         if [ -n "$$$$$$$$modules" ]; then \
 199                 modules="$$$$$$$$(echo "$$$$$$$$modules" | tr ' ' '\n' | sort | uniq | paste -s -d' ' -)"; \
 200                 mkdir -p $(2)/etc/modules.d; \
 201                 mkdir -p $(2)/CONTROL; \
 202                 echo "#!/bin/sh" > $(2)/CONTROL/postinst-pkg; \
 203                 echo "[ -z \"\$$$$$$$$IPKG_INSTROOT\" ] || exit 0" >> $(2)/CONTROL/postinst-pkg; \
 204                 echo ". /lib/functions.sh" >> $(2)/CONTROL/postinst-pkg; \
 205                 echo "insert_modules $$$$$$$$modules" >> $(2)/CONTROL/postinst-pkg; \
 206                 chmod 0755 $(2)/CONTROL/postinst-pkg; \
 207         fi
 208 endef
 209
 210 ifeq ($(DUMP)$(TARGET_BUILD),)
 211   -include $(LINUX_DIR)/.config
 212 endif
 213
 214 define KernelPackage/depends
 215   $(STAMP_BUILT): $(LINUX_DIR)/.config
 216   define KernelPackage/depends
 217   endef
 218 endef
 219
 220 define KernelPackage
 221   NAME:=$(1)
 222   $(eval $(call Package/Default))
 223   $(eval $(call KernelPackage/Defaults))
 224   $(eval $(call KernelPackage/$(1)))
 225   $(eval $(call KernelPackage/$(1)/$(BOARD)))
 226   $(eval $(call KernelPackage/$(1)/$(BOARD)/$(if $(SUBTARGET),$(SUBTARGET),generic)))
 227
 228   define Package/kmod-$(1)
 229     TITLE:=$(TITLE)
 230     SECTION:=kernel
 231     CATEGORY:=Kernel modules
 232     DESCRIPTION:=$(DESCRIPTION)
 233     EXTRA_DEPENDS:=kernel (=$(LINUX_VERSION)-$(LINUX_RELEASE)-$(LINUX_VERMAGIC))
 234     VERSION:=$(LINUX_VERSION)$(if $(PKG_VERSION),+$(PKG_VERSION))-$(if $(PKG_RELEASE),$(PKG_RELEASE),$(LINUX_RELEASE))
 235     PKGFLAGS:=$(PKGFLAGS)
 236     $(call KernelPackage/$(1))
 237     $(call KernelPackage/$(1)/$(BOARD))
 238     $(call KernelPackage/$(1)/$(BOARD)/$(if $(SUBTARGET),$(SUBTARGET),generic))
 239   endef
 240
 241   ifdef KernelPackage/$(1)/conffiles
 242     define Package/kmod-$(1)/conffiles
 243 $(call KernelPackage/$(1)/conffiles)
 244     endef
 245   endif
 246
 247   ifdef KernelPackage/$(1)/description
 248     define Package/kmod-$(1)/description
 249 $(call KernelPackage/$(1)/description)
 250     endef
 251   endif
 252
 253   ifdef KernelPackage/$(1)/config
 254     define Package/kmod-$(1)/config
 255 $(call KernelPackage/$(1)/config)
 256     endef
 257   endif
 258
 259   $(call KernelPackage/depends)
 260   $(call KernelPackage/hooks)
 261
 262   ifneq ($(if $(filter-out %=y %=n %=m,$(KCONFIG)),$(filter m y,$(foreach c,$(filter-out %=y %=n %=m,$(KCONFIG)),$($(c)))),.),)
 263     ifneq ($(strip $(FILES)),)
 264       define Package/kmod-$(1)/install
 265                   @for mod in $$(call version_filter,$$(FILES)); do \
 266                         if grep -q "$$$$$$$${mod##$(LINUX_DIR)/}" "$(LINUX_DIR)/modules.builtin"; then \
 267                                 echo "NOTICE: module '$$$$$$$$mod' is built-in."; \
 268                         elif [ -e $$$$$$$$mod ]; then \
 269                                 mkdir -p $$(1)/$(MODULES_SUBDIR) ; \
 270                                 $(CP) -L $$$$$$$$mod $$(1)/$(MODULES_SUBDIR)/ ; \
 271                         else \
 272                                 echo "ERROR: module '$$$$$$$$mod' is missing." >&2; \
 273                                 exit 1; \
 274                         fi; \
 275                   done;
 276                   $(call ModuleAutoLoad,$(1),$$(1),$(AUTOLOAD))
 277                   $(call KernelPackage/$(1)/install,$$(1))
 278       endef
 279     endif
 280   $(if $(CONFIG_PACKAGE_kmod-$(1)),
 281     else
 282       compile: $(1)-disabled
 283       $(1)-disabled:
 284                 @echo "WARNING: kmod-$(1) is not available in the kernel config - generating empty package" >&2
 285
 286       define Package/kmod-$(1)/install
 287                 true
 288       endef
 289   )
 290   endif
 291   $$(eval $$(call BuildPackage,kmod-$(1)))
 292
 293   $$(IPKG_kmod-$(1)): $$(wildcard $$(FILES))
 294 endef
 295
 296 version_filter=$(if $(findstring @,$(1)),$(shell $(SCRIPT_DIR)/package-metadata.pl version_filter $(KERNEL_PATCHVER) $(1)),$(1))
 297
 298 define AutoLoad
 299   add_module "$(1)" "$(call version_filter,$(2))" "$(3)";
 300 endef
 301
 302 define AutoProbe
 303   probe_module "$(call version_filter,$(1))" "$(2)";
 304 endef
 305
 306 version_field=$(if $(word $(1),$(2)),$(word $(1),$(2)),0)
 307 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)) ))
 308
 309 ifdef DUMP
 310   kernel_version_cmp=
 311 else
 312   kernel_version_cmp=$(shell [ $(call kernel_version_merge,$(call split_version,$(2))) $(1) $(call kernel_version_merge,$(call split_version,$(3))) ] && echo 1 )
 313 endif
 314
 315 CompareKernelPatchVer=$(if $(call kernel_version_cmp,-$(2),$(1),$(3)),1,0)
 316
 317 kernel_patchver_gt=$(call kernel_version_cmp,-gt,$(KERNEL_PATCHVER),$(1))
 318 kernel_patchver_ge=$(call kernel_version_cmp,-ge,$(KERNEL_PATCHVER),$(1))
 319 kernel_patchver_eq=$(call kernel_version_cmp,-eq,$(KERNEL_PATCHVER),$(1))
 320 kernel_patchver_le=$(call kernel_version_cmp,-le,$(KERNEL_PATCHVER),$(1))
 321 kernel_patchver_lt=$(call kernel_version_cmp,-lt,$(KERNEL_PATCHVER),$(1))
 322