include/kernel-build.mk

   1 #
   2 # Copyright (C) 2006-2007 OpenWrt.org
   3 #
   4 # This is free software, licensed under the GNU General Public License v2.
   5 # See /LICENSE for more information.
   6 #
   7 include $(INCLUDE_DIR)/prereq.mk
   8 include $(INCLUDE_DIR)/depends.mk
   9
  10 ifneq ($(DUMP),1)
  11   all: compile
  12 endif
  13
  14 KERNEL_FILE_DEPENDS=$(GENERIC_BACKPORT_DIR) $(GENERIC_PATCH_DIR) $(GENERIC_HACK_DIR) $(PATCH_DIR) $(GENERIC_FILES_DIR) $(FILES_DIR)
  15 STAMP_PREPARED=$(LINUX_DIR)/.prepared$(if $(QUILT)$(DUMP),,_$(shell $(call find_md5,$(KERNEL_FILE_DEPENDS),)))
  16 STAMP_CONFIGURED:=$(LINUX_DIR)/.configured
  17 include $(INCLUDE_DIR)/download.mk
  18 include $(INCLUDE_DIR)/quilt.mk
  19 include $(INCLUDE_DIR)/kernel-defaults.mk
  20
  21 define Kernel/Prepare
  22         $(call Kernel/Prepare/Default)
  23 endef
  24
  25 define Kernel/Configure
  26         $(call Kernel/Configure/Default)
  27 endef
  28
  29 define Kernel/CompileModules
  30         $(call Kernel/CompileModules/Default)
  31 endef
  32
  33 define Kernel/CompileImage
  34         $(call Kernel/CompileImage/Default)
  35         $(call Kernel/CompileImage/Initramfs)
  36 endef
  37
  38 define Kernel/Clean
  39         $(call Kernel/Clean/Default)
  40 endef
  41
  42 define Download/kernel
  43   URL:=$(LINUX_SITE)
  44   FILE:=$(LINUX_SOURCE)
  45   HASH:=$(LINUX_KERNEL_HASH)
  46 endef
  47
  48 KERNEL_GIT_OPTS:=
  49 ifneq ($(strip $(CONFIG_KERNEL_GIT_LOCAL_REPOSITORY)),"")
  50   KERNEL_GIT_OPTS+=--reference $(CONFIG_KERNEL_GIT_LOCAL_REPOSITORY)
  51 endif
  52
  53 define Download/git-kernel
  54   URL:=$(call qstrip,$(CONFIG_KERNEL_GIT_CLONE_URI))
  55   PROTO:=git
  56   VERSION:=$(CONFIG_KERNEL_GIT_REF)
  57   FILE:=$(LINUX_SOURCE)
  58   SUBDIR:=linux-$(LINUX_VERSION)
  59   OPTS:=$(KERNEL_GIT_OPTS)
  60 endef
  61
  62 ifdef CONFIG_COLLECT_KERNEL_DEBUG
  63   define Kernel/CollectDebug
  64         rm -rf $(KERNEL_BUILD_DIR)/debug
  65         mkdir -p $(KERNEL_BUILD_DIR)/debug/modules
  66         $(CP) $(LINUX_DIR)/vmlinux $(KERNEL_BUILD_DIR)/debug/
  67         -$(CP) \
  68                 $(STAGING_DIR_ROOT)/lib/modules/$(LINUX_VERSION)/* \
  69                 $(KERNEL_BUILD_DIR)/debug/modules/
  70         $(FIND) $(KERNEL_BUILD_DIR)/debug -type f | $(XARGS) $(KERNEL_CROSS)strip --only-keep-debug
  71         $(TAR) c -C $(KERNEL_BUILD_DIR) debug \
  72                 $(if $(SOURCE_DATE_EPOCH),--mtime="@$(SOURCE_DATE_EPOCH)") \
  73                 | bzip2 -c -9 > $(BIN_DIR)/kernel-debug.tar.bz2
  74   endef
  75 endif
  76
  77 ifeq ($(DUMP)$(filter prereq clean refresh update,$(MAKECMDGOALS)),)
  78   ifneq ($(if $(QUILT),,$(CONFIG_AUTOREBUILD)),)
  79     define Kernel/Autoclean
  80       $(PKG_BUILD_DIR)/.dep_files: $(STAMP_PREPARED)
  81       $(call rdep,$(KERNEL_FILE_DEPENDS),$(STAMP_PREPARED),$(PKG_BUILD_DIR)/.dep_files,-x "*/.dep_*")
  82     endef
  83   endif
  84 endif
  85
  86 define BuildKernel
  87   $(if $(QUILT),$(Build/Quilt))
  88   $(if $(LINUX_SITE),$(call Download,kernel))
  89   $(if $(call qstrip,$(CONFIG_KERNEL_GIT_CLONE_URI)),$(call Download,git-kernel))
  90
  91   .NOTPARALLEL:
  92
  93   $(Kernel/Autoclean)
  94   $(STAMP_PREPARED): $(if $(LINUX_SITE),$(DL_DIR)/$(LINUX_SOURCE))
  95         -rm -rf $(KERNEL_BUILD_DIR)
  96         -mkdir -p $(KERNEL_BUILD_DIR)
  97         $(Kernel/Prepare)
  98         touch $$@
  99
 100   $(KERNEL_BUILD_DIR)/symtab.h: FORCE
 101         rm -f $(KERNEL_BUILD_DIR)/symtab.h
 102         touch $(KERNEL_BUILD_DIR)/symtab.h
 103         +$(KERNEL_MAKE) vmlinux
 104         find $(LINUX_DIR) $(STAGING_DIR_ROOT)/lib/modules -name \*.ko | \
 105                 xargs $(TARGET_CROSS)nm | \
 106                 awk '$$$$1 == "U" { print $$$$2 } ' | \
 107                 sort -u > $(KERNEL_BUILD_DIR)/mod_symtab.txt
 108         $(TARGET_CROSS)nm -n $(LINUX_DIR)/vmlinux.o | grep ' [rR] __ksymtab' | sed -e 's,........ [rR] __ksymtab_,,' > $(KERNEL_BUILD_DIR)/kernel_symtab.txt
 109         grep -Ff $(KERNEL_BUILD_DIR)/mod_symtab.txt $(KERNEL_BUILD_DIR)/kernel_symtab.txt > $(KERNEL_BUILD_DIR)/sym_include.txt
 110         grep -Fvf $(KERNEL_BUILD_DIR)/mod_symtab.txt $(KERNEL_BUILD_DIR)/kernel_symtab.txt > $(KERNEL_BUILD_DIR)/sym_exclude.txt
 111         ( \
 112                 echo '#define SYMTAB_KEEP \'; \
 113                 cat $(KERNEL_BUILD_DIR)/sym_include.txt | \
 114                         awk '{print "KEEP(*(___ksymtab+" $$$$1 ")) \\" }'; \
 115                 echo; \
 116                 echo '#define SYMTAB_KEEP_GPL \'; \
 117                 cat $(KERNEL_BUILD_DIR)/sym_include.txt | \
 118                         awk '{print "KEEP(*(___ksymtab_gpl+" $$$$1 ")) \\" }'; \
 119                 echo; \
 120                 echo '#define SYMTAB_DISCARD \'; \
 121                 cat $(KERNEL_BUILD_DIR)/sym_exclude.txt | \
 122                         awk '{print "*(___ksymtab+" $$$$1 ") \\" }'; \
 123                 echo; \
 124                 echo '#define SYMTAB_DISCARD_GPL \'; \
 125                 cat $(KERNEL_BUILD_DIR)/sym_exclude.txt | \
 126                         awk '{print "*(___ksymtab_gpl+" $$$$1 ") \\" }'; \
 127                 echo; \
 128         ) > $$@
 129
 130   $(STAMP_CONFIGURED): $(STAMP_PREPARED) $(LINUX_KCONFIG_LIST) $(TOPDIR)/.config FORCE
 131         $(Kernel/Configure)
 132         touch $$@
 133
 134   $(LINUX_DIR)/.modules: export STAGING_PREFIX=$$(STAGING_DIR_HOST)
 135   $(LINUX_DIR)/.modules: export PKG_CONFIG_PATH=$$(STAGING_DIR_HOST)/lib/pkgconfig
 136   $(LINUX_DIR)/.modules: export PKG_CONFIG_LIBDIR=$$(STAGING_DIR_HOST)/lib/pkgconfig
 137   $(LINUX_DIR)/.modules: $(STAMP_CONFIGURED) $(LINUX_DIR)/.config FORCE
 138         $(Kernel/CompileModules)
 139         touch $$@
 140
 141   $(LINUX_DIR)/.image: export STAGING_PREFIX=$$(STAGING_DIR_HOST)
 142   $(LINUX_DIR)/.image: export PKG_CONFIG_PATH=$$(STAGING_DIR_HOST)/lib/pkgconfig
 143   $(LINUX_DIR)/.image: export PKG_CONFIG_LIBDIR=$$(STAGING_DIR_HOST)/lib/pkgconfig
 144   $(LINUX_DIR)/.image: $(STAMP_CONFIGURED) $(if $(CONFIG_STRIP_KERNEL_EXPORTS),$(KERNEL_BUILD_DIR)/symtab.h) FORCE
 145         $(Kernel/CompileImage)
 146         $(Kernel/CollectDebug)
 147         touch $$@
 148
 149   mostlyclean: FORCE
 150         $(Kernel/Clean)
 151
 152   define BuildKernel
 153   endef
 154
 155   download: $(if $(LINUX_SITE),$(DL_DIR)/$(LINUX_SOURCE))
 156   prepare: $(STAMP_PREPARED)
 157   compile: $(LINUX_DIR)/.modules
 158         $(MAKE) -C image compile TARGET_BUILD=
 159
 160   oldconfig menuconfig nconfig: $(STAMP_PREPARED) $(STAMP_CHECKED) FORCE
 161         rm -f $(LINUX_DIR)/.config.prev
 162         rm -f $(STAMP_CONFIGURED)
 163         $(LINUX_RECONF_CMD) > $(LINUX_DIR)/.config
 164         $(_SINGLE)$(KERNEL_MAKE) \
 165                 $(if $(findstring Darwin,$(HOST_OS)),HOST_LOADLIBES="-L$(STAGING_DIR_HOST)/lib -lncurses") \
 166                 YACC=$(STAGING_DIR_HOST)/bin/bison \
 167                 $$@
 168         $(LINUX_RECONF_DIFF) $(LINUX_DIR)/.config | \
 169                 grep -vE '(CONFIG_CC_(HAS_ASM_GOTO|IS_GCC|IS_CLANG)|GCC_VERSION)=' \
 170                 > $(LINUX_RECONFIG_TARGET)
 171
 172   install: $(LINUX_DIR)/.image
 173         +$(MAKE) -C image compile install TARGET_BUILD=
 174
 175   clean: FORCE
 176         rm -rf $(KERNEL_BUILD_DIR)
 177
 178   image-prereq:
 179         @+$(NO_TRACE_MAKE) -s -C image prereq TARGET_BUILD=
 180
 181   prereq: image-prereq
 182
 183 endef