1# 2# Copyright (c) 2013 The Linux Foundation. All rights reserved. 3# Copyright (C) 2006-2007 OpenWrt.org 4# 5# This is free software, licensed under the GNU General Public License v2. 6# See /LICENSE for more information. 7# 8include $(INCLUDE_DIR)/host.mk 9include $(INCLUDE_DIR)/prereq.mk 10 11ifneq ($(DUMP),1) 12 all: compile 13endif 14 15export QUILT=1 16STAMP_PREPARED:=$(LINUX_DIR)/.prepared 17STAMP_CONFIGURED:=$(LINUX_DIR)/.configured 18include $(INCLUDE_DIR)/download.mk 19include $(INCLUDE_DIR)/quilt.mk 20include $(INCLUDE_DIR)/kernel-defaults.mk 21 22define Kernel/Prepare 23 $(call Kernel/Prepare/Default) 24endef 25 26define Kernel/Configure 27 $(call Kernel/Configure/Default) 28endef 29 30define Kernel/CompileModules 31 $(call Kernel/CompileModules/Default) 32endef 33 34define Kernel/CompileImage 35 $(call Kernel/CompileImage/Default) 36endef 37 38define Kernel/Clean 39 $(call Kernel/Clean/Default) 40endef 41 42define Download/kernel 43 URL:=$(LINUX_SITE) 44 FILE:=$(LINUX_SOURCE) 45 MD5SUM:=$(LINUX_KERNEL_MD5SUM) 46endef 47 48ifdef CONFIG_COLLECT_KERNEL_DEBUG 49 define Kernel/CollectDebug 50 rm -rf $(KERNEL_BUILD_DIR)/debug 51 mkdir -p $(KERNEL_BUILD_DIR)/debug/modules 52 $(CP) $(LINUX_DIR)/vmlinux $(KERNEL_BUILD_DIR)/debug/ 53 -$(CP) \ 54 $(STAGING_DIR_ROOT)/lib/modules/$(LINUX_VERSION)/* \ 55 $(KERNEL_BUILD_DIR)/debug/modules/ 56 $(FIND) $(KERNEL_BUILD_DIR)/debug -type f | $(XARGS) $(KERNEL_CROSS)strip --only-keep-debug 57 $(TAR) c -C $(KERNEL_BUILD_DIR) debug | bzip2 -c -9 > $(BIN_DIR)/kernel-debug.tar.bz2 58 endef 59endif 60 61define BuildKernel 62 $(if $(QUILT),$(Build/Quilt)) 63 $(if $(LINUX_SITE),$(call Download,kernel)) 64 65 $(STAMP_PREPARED): $(DL_DIR)/$(LINUX_SOURCE) 66 -rm -rf $(KERNEL_BUILD_DIR) 67 -mkdir -p $(KERNEL_BUILD_DIR) 68 $(Kernel/Prepare) 69 touch $$@ 70 71 $(KERNEL_BUILD_DIR)/symtab.txt: FORCE 72 find $(LINUX_DIR) $(STAGING_DIR_ROOT)/lib/modules -name \*.ko | \ 73 xargs $(TARGET_CROSS)nm | \ 74 awk '$$$$1 == "U" { print $$$$2 } ' | \ 75 sort -u > $$@ 76 77 $(KERNEL_BUILD_DIR)/symtab.h: $(KERNEL_BUILD_DIR)/symtab.txt 78 ( \ 79 echo '#define SYMTAB_KEEP \'; \ 80 cat $(KERNEL_BUILD_DIR)/symtab.txt | \ 81 awk '{print "*(__ksymtab." $$$$1 ") \\" }'; \ 82 echo; \ 83 echo '#define SYMTAB_KEEP_GPL \'; \ 84 cat $(KERNEL_BUILD_DIR)/symtab.txt | \ 85 awk '{print "*(__ksymtab_gpl." $$$$1 ") \\" }'; \ 86 echo; \ 87 echo '#define SYMTAB_KEEP_STR \'; \ 88 cat $(KERNEL_BUILD_DIR)/symtab.txt | \ 89 awk '{print "*(__ksymtab_strings." $$$$1 ") \\" }'; \ 90 echo; \ 91 ) > $$@ 92 93 $(STAMP_CONFIGURED): $(STAMP_PREPARED) $(LINUX_KCONFIG_LIST) $(TOPDIR)/.config 94 $(Kernel/Configure) 95 touch $$@ 96 97 $(LINUX_DIR)/.modules: $(STAMP_CONFIGURED) $(LINUX_DIR)/.config FORCE 98 $(Kernel/CompileModules) 99 touch $$@ 100 101 $(LINUX_DIR)/.image: $(STAMP_CONFIGURED) $(if $(CONFIG_STRIP_KERNEL_EXPORTS),$(KERNEL_BUILD_DIR)/symtab.h) FORCE 102 $(Kernel/CompileImage) 103 $(Kernel/CollectDebug) 104 touch $$@ 105 106 mostlyclean: FORCE 107 $(Kernel/Clean) 108 109 define BuildKernel 110 endef 111 112 download: $(DL_DIR)/$(LINUX_SOURCE) 113 prepare: $(STAMP_CONFIGURED) 114 compile: $(LINUX_DIR)/.modules 115 $(MAKE) -C image compile TARGET_BUILD= 116 117 oldconfig menuconfig nconfig: $(STAMP_PREPARED) $(STAMP_CHECKED) FORCE 118 rm -f $(STAMP_CONFIGURED) 119 $(LINUX_RECONF_CMD) > $(LINUX_DIR)/.config 120 $(_SINGLE)$(MAKE) -C $(LINUX_DIR) $(KERNEL_MAKEOPTS) $$@ 121 $(LINUX_RECONF_DIFF) $(LINUX_DIR)/.config > $(LINUX_RECONFIG_TARGET) 122 123 install: $(LINUX_DIR)/.image 124 +$(MAKE) -C image compile install TARGET_BUILD= 125 126 clean: FORCE 127 rm -rf $(KERNEL_BUILD_DIR) 128 129 image-prereq: 130 @+$(NO_TRACE_MAKE) -s -C image prereq TARGET_BUILD= 131 132 prereq: image-prereq 133 134endef 135