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=$(BACKPORT_PATCH_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 $(CONFIG_KERNEL_GIT_LOCAL_REPOSITORY)
  51 endif
  52
  53 ifneq ($(strip $(CONFIG_KERNEL_GIT_BRANCH)),"")
  54   KERNEL_GIT_OPTS+=--branch $(CONFIG_KERNEL_GIT_BRANCH)
  55 endif
  56
  57 define Download/git-kernel
  58   URL:=$(call qstrip,$(CONFIG_KERNEL_GIT_CLONE_URI))
  59   PROTO:=git
  60   VERSION:=$(CONFIG_KERNEL_GIT_BRANCH)
  61   FILE:=$(LINUX_SOURCE)
  62   SUBDIR:=linux-$(LINUX_VERSION)
  63   OPTS:=$(KERNEL_GIT_OPTS)
  64 endef
  65
  66 ifdef CONFIG_COLLECT_KERNEL_DEBUG
  67   define Kernel/CollectDebug
  68         rm -rf $(KERNEL_BUILD_DIR)/debug
  69         mkdir -p $(KERNEL_BUILD_DIR)/debug/modules
  70         $(CP) $(LINUX_DIR)/vmlinux $(KERNEL_BUILD_DIR)/debug/
  71         -$(CP) \
  72                 $(STAGING_DIR_ROOT)/lib/modules/$(LINUX_VERSION)/* \
  73                 $(KERNEL_BUILD_DIR)/debug/modules/
  74         $(FIND) $(KERNEL_BUILD_DIR)/debug -type f | $(XARGS) $(KERNEL_CROSS)strip --only-keep-debug
  75         $(TAR) c -C $(KERNEL_BUILD_DIR) debug \
  76                 $(if $(SOURCE_DATE_EPOCH),--mtime="@$(SOURCE_DATE_EPOCH)") \
  77                 | bzip2 -c -9 > $(BIN_DIR)/kernel-debug.tar.bz2
  78   endef
  79 endif
  80
  81 ifeq ($(DUMP)$(filter prereq clean refresh update,$(MAKECMDGOALS)),)
  82   ifneq ($(if $(QUILT),,$(CONFIG_AUTOREBUILD)),)
  83     define Kernel/Autoclean
  84       $(PKG_BUILD_DIR)/.dep_files: $(STAMP_PREPARED)
  85       $(call rdep,$(KERNEL_FILE_DEPENDS),$(STAMP_PREPARED),$(PKG_BUILD_DIR)/.dep_files,-x "*/.dep_*")
  86     endef
  87   endif
  88 endif
  89
  90 define BuildKernel
  91   $(if $(QUILT),$(Build/Quilt))
  92   $(if $(LINUX_SITE),$(call Download,kernel))
  93   $(if $(call qstrip,$(CONFIG_KERNEL_GIT_CLONE_URI)),$(call Download,git-kernel))
  94
  95   .NOTPARALLEL:
  96
  97   $(Kernel/Autoclean)
  98   $(STAMP_PREPARED): $(if $(LINUX_SITE),$(DL_DIR)/$(LINUX_SOURCE))
  99         -rm -rf $(KERNEL_BUILD_DIR)
 100         -mkdir -p $(KERNEL_BUILD_DIR)
 101         $(Kernel/Prepare)
 102         touch $$@
 103
 104   $(KERNEL_BUILD_DIR)/symtab.h: FORCE
 105         rm -f $(KERNEL_BUILD_DIR)/symtab.h
 106         touch $(KERNEL_BUILD_DIR)/symtab.h
 107         +$(KERNEL_MAKE) vmlinux
 108         find $(LINUX_DIR) $(STAGING_DIR_ROOT)/lib/modules -name \*.ko | \
 109                 xargs $(TARGET_CROSS)nm | \
 110                 awk '$$$$1 == "U" { print $$$$2 } ' | \
 111                 sort -u > $(KERNEL_BUILD_DIR)/mod_symtab.txt
 112         $(TARGET_CROSS)nm -n $(LINUX_DIR)/vmlinux.o | grep ' [rR] __ksymtab' | sed -e 's,........ [rR] __ksymtab_,,' > $(KERNEL_BUILD_DIR)/kernel_symtab.txt
 113         grep -Ff $(KERNEL_BUILD_DIR)/mod_symtab.txt $(KERNEL_BUILD_DIR)/kernel_symtab.txt > $(KERNEL_BUILD_DIR)/sym_include.txt
 114         grep -Fvf $(KERNEL_BUILD_DIR)/mod_symtab.txt $(KERNEL_BUILD_DIR)/kernel_symtab.txt > $(KERNEL_BUILD_DIR)/sym_exclude.txt
 115         ( \
 116                 echo '#define SYMTAB_KEEP \'; \
 117                 cat $(KERNEL_BUILD_DIR)/sym_include.txt | \
 118                         awk '{print "KEEP(*(___ksymtab+" $$$$1 ")) \\" }'; \
 119                 echo; \
 120                 echo '#define SYMTAB_KEEP_GPL \'; \
 121                 cat $(KERNEL_BUILD_DIR)/sym_include.txt | \
 122                         awk '{print "KEEP(*(___ksymtab_gpl+" $$$$1 ")) \\" }'; \
 123                 echo; \
 124                 echo '#define SYMTAB_DISCARD \'; \
 125                 cat $(KERNEL_BUILD_DIR)/sym_exclude.txt | \
 126                         awk '{print "*(___ksymtab+" $$$$1 ") \\" }'; \
 127                 echo; \
 128                 echo '#define SYMTAB_DISCARD_GPL \'; \
 129                 cat $(KERNEL_BUILD_DIR)/sym_exclude.txt | \
 130                         awk '{print "*(___ksymtab_gpl+" $$$$1 ") \\" }'; \
 131                 echo; \
 132         ) > $$@
 133
 134   $(STAMP_CONFIGURED): $(STAMP_PREPARED) $(LINUX_KCONFIG_LIST) $(TOPDIR)/.config FORCE
 135         $(Kernel/Configure)
 136         touch $$@
 137
 138   $(LINUX_DIR)/.modules: $(STAMP_CONFIGURED) $(LINUX_DIR)/.config FORCE
 139         $(Kernel/CompileModules)
 140         touch $$@
 141
 142   $(LINUX_DIR)/.image: $(STAMP_CONFIGURED) $(if $(CONFIG_STRIP_KERNEL_EXPORTS),$(KERNEL_BUILD_DIR)/symtab.h) FORCE
 143         $(Kernel/CompileImage)
 144         $(Kernel/CollectDebug)
 145         touch $$@
 146
 147   mostlyclean: FORCE
 148         $(Kernel/Clean)
 149
 150   define BuildKernel
 151   endef
 152
 153   download: $(if $(LINUX_SITE),$(DL_DIR)/$(LINUX_SOURCE))
 154   prepare: $(STAMP_PREPARED)
 155   compile: $(LINUX_DIR)/.modules
 156         $(MAKE) -C image compile TARGET_BUILD=
 157
 158   oldconfig menuconfig nconfig: $(STAMP_PREPARED) $(STAMP_CHECKED) FORCE
 159         rm -f $(LINUX_DIR)/.config.prev
 160         rm -f $(STAMP_CONFIGURED)
 161         $(LINUX_RECONF_CMD) > $(LINUX_DIR)/.config
 162         $(_SINGLE)$(KERNEL_MAKE) \
 163                 $(if $(findstring Darwin,$(HOST_OS)),HOST_LOADLIBES="-L$(STAGING_DIR_HOST)/lib -lncurses") \
 164                 $$@
 165         $(LINUX_RECONF_DIFF) $(LINUX_DIR)/.config > $(LINUX_RECONFIG_TARGET)
 166
 167   install: $(LINUX_DIR)/.image
 168         +$(MAKE) -C image compile install TARGET_BUILD=
 169
 170   clean: FORCE
 171         rm -rf $(KERNEL_BUILD_DIR)
 172
 173   image-prereq:
 174         @+$(NO_TRACE_MAKE) -s -C image prereq TARGET_BUILD=
 175
 176   prereq: image-prereq
 177
 178 endef