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)/host.mk
   8 include $(INCLUDE_DIR)/prereq.mk
   9
  10 ifneq ($(DUMP),1)
  11   all: compile
  12 endif
  13
  14 export QUILT=1
  15 STAMP_PREPARED:=$(LINUX_DIR)/.prepared
  16 STAMP_CONFIGURED:=$(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 endef
  36
  37 define Kernel/Clean
  38         $(call Kernel/Clean/Default)
  39 endef
  40
  41 define Download/kernel
  42   URL:=$(LINUX_SITE)
  43   FILE:=$(LINUX_SOURCE)
  44   MD5SUM:=$(LINUX_KERNEL_MD5SUM)
  45 endef
  46
  47 define BuildKernel
  48   $(if $(QUILT),$(Build/Quilt))
  49   $(if $(LINUX_SITE),$(call Download,kernel))
  50
  51   $(STAMP_PREPARED): $(DL_DIR)/$(LINUX_SOURCE)
  52         -rm -rf $(KERNEL_BUILD_DIR)
  53         -mkdir -p $(KERNEL_BUILD_DIR)
  54         $(Kernel/Prepare)
  55         touch $$@
  56
  57   $(KERNEL_BUILD_DIR)/symtab.txt: FORCE
  58         find $(LINUX_DIR) $(STAGING_DIR_ROOT)/lib/modules -name \*.ko | \
  59                 xargs $(TARGET_CROSS)nm | \
  60                 awk '$$$$1 == "U" { print $$$$2 } ' | \
  61                 sort -u > $$@
  62
  63   $(KERNEL_BUILD_DIR)/symtab.h: $(KERNEL_BUILD_DIR)/symtab.txt
  64         ( \
  65                 echo '#define SYMTAB_KEEP \'; \
  66                 cat $(KERNEL_BUILD_DIR)/symtab.txt | \
  67                         awk '{print "*(__ksymtab." $$$$1 ") \\" }'; \
  68                 echo; \
  69                 echo '#define SYMTAB_KEEP_GPL \'; \
  70                 cat $(KERNEL_BUILD_DIR)/symtab.txt | \
  71                         awk '{print "*(__ksymtab_gpl." $$$$1 ") \\" }'; \
  72                 echo; \
  73                 echo '#define SYMTAB_KEEP_STR \'; \
  74                 cat $(KERNEL_BUILD_DIR)/symtab.txt | \
  75                         awk '{print "*(__ksymtab_strings." $$$$1 ") \\" }'; \
  76                 echo; \
  77         ) > $$@
  78
  79   $(STAMP_CONFIGURED): $(STAMP_PREPARED) $(LINUX_CONFIG) $(GENERIC_LINUX_CONFIG) $(TOPDIR)/.config
  80         $(Kernel/Configure)
  81         touch $$@
  82
  83   $(LINUX_DIR)/.modules: $(STAMP_CONFIGURED) $(LINUX_DIR)/.config FORCE
  84         $(Kernel/CompileModules)
  85         touch $$@
  86
  87   $(LINUX_DIR)/.image: $(STAMP_CONFIGURED) $(if $(CONFIG_STRIP_KERNEL_EXPORTS),$(KERNEL_BUILD_DIR)/symtab.h) FORCE
  88         $(Kernel/CompileImage)
  89         touch $$@
  90
  91   mostlyclean: FORCE
  92         $(Kernel/Clean)
  93
  94   define BuildKernel
  95   endef
  96
  97   download: $(DL_DIR)/$(LINUX_SOURCE)
  98   prepare: $(STAMP_CONFIGURED)
  99   compile: $(LINUX_DIR)/.modules
 100         $(MAKE) -C image compile TARGET_BUILD=
 101
 102   oldconfig menuconfig: $(STAMP_PREPARED) $(STAMP_CHECKED) FORCE
 103         [ -e "$(LINUX_CONFIG)" ] || touch "$(LINUX_CONFIG)"
 104         $(LINUX_CONFCMD) > $(LINUX_DIR)/.config
 105         touch $(LINUX_CONFIG)
 106         $(_SINGLE)$(MAKE) -C $(LINUX_DIR) $(KERNEL_MAKEOPTS) $$@
 107         $(SCRIPT_DIR)/kconfig.pl '>' $(if $(LINUX_SUBCONFIG),'+' $(GENERIC_LINUX_CONFIG) $(LINUX_CONFIG),$(GENERIC_LINUX_CONFIG)) \
 108                 $(LINUX_DIR)/.config > $(if $(LINUX_SUBCONFIG),$(LINUX_SUBCONFIG),$(LINUX_CONFIG))
 109         $(Kernel/Configure)
 110
 111   install: $(LINUX_DIR)/.image
 112         +$(MAKE) -C image compile install TARGET_BUILD=
 113
 114   clean: FORCE
 115         rm -rf $(KERNEL_BUILD_DIR)
 116
 117   image-prereq:
 118         @+$(NO_TRACE_MAKE) -s -C image prereq TARGET_BUILD=
 119
 120   prereq: image-prereq
 121
 122 endef