Root/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#
7include $(INCLUDE_DIR)/host.mk
8include $(INCLUDE_DIR)/prereq.mk
9
10ifneq ($(DUMP),1)
11  all: compile
12endif
13
14export QUILT=1
15STAMP_PREPARED:=$(LINUX_DIR)/.prepared
16STAMP_CONFIGURED:=$(LINUX_DIR)/.configured
17include $(INCLUDE_DIR)/download.mk
18include $(INCLUDE_DIR)/quilt.mk
19include $(INCLUDE_DIR)/kernel-defaults.mk
20
21define Kernel/Prepare
22    $(call Kernel/Prepare/Default)
23endef
24
25define Kernel/Configure
26    $(call Kernel/Configure/Default)
27endef
28
29define Kernel/CompileModules
30    $(call Kernel/CompileModules/Default)
31endef
32
33define Kernel/CompileImage
34    $(call Kernel/CompileImage/Default)
35endef
36
37define Kernel/Clean
38    $(call Kernel/Clean/Default)
39endef
40
41define Download/kernel
42  URL:=$(LINUX_SITE)
43  FILE:=$(LINUX_SOURCE)
44  MD5SUM:=$(LINUX_KERNEL_MD5SUM)
45endef
46
47ifdef CONFIG_COLLECT_KERNEL_DEBUG
48  define Kernel/CollectDebug
49    rm -rf $(KERNEL_BUILD_DIR)/debug
50    mkdir -p $(KERNEL_BUILD_DIR)/debug/modules
51    $(CP) $(LINUX_DIR)/vmlinux $(KERNEL_BUILD_DIR)/debug/
52    -$(CP) \
53        $(STAGING_DIR_ROOT)/lib/modules/$(LINUX_VERSION)/* \
54        $(KERNEL_BUILD_DIR)/debug/modules/
55    $(FIND) $(KERNEL_BUILD_DIR)/debug -type f | $(XARGS) $(KERNEL_CROSS)strip --only-keep-debug
56    $(TAR) c -C $(KERNEL_BUILD_DIR) debug | bzip2 -c -9 > $(BIN_DIR)/kernel-debug.tar.bz2
57  endef
58endif
59
60define BuildKernel
61  $(if $(QUILT),$(Build/Quilt))
62  $(if $(LINUX_SITE),$(call Download,kernel))
63
64  $(STAMP_PREPARED): $(DL_DIR)/$(LINUX_SOURCE)
65    -rm -rf $(KERNEL_BUILD_DIR)
66    -mkdir -p $(KERNEL_BUILD_DIR)
67    $(Kernel/Prepare)
68    touch $$@
69
70  $(KERNEL_BUILD_DIR)/symtab.txt: FORCE
71    find $(LINUX_DIR) $(STAGING_DIR_ROOT)/lib/modules -name \*.ko | \
72        xargs $(TARGET_CROSS)nm | \
73        awk '$$$$1 == "U" { print $$$$2 } ' | \
74        sort -u > $$@
75
76  $(KERNEL_BUILD_DIR)/symtab.h: $(KERNEL_BUILD_DIR)/symtab.txt
77    ( \
78        echo '#define SYMTAB_KEEP \'; \
79        cat $(KERNEL_BUILD_DIR)/symtab.txt | \
80            awk '{print "*(__ksymtab." $$$$1 ") \\" }'; \
81        echo; \
82        echo '#define SYMTAB_KEEP_GPL \'; \
83        cat $(KERNEL_BUILD_DIR)/symtab.txt | \
84            awk '{print "*(__ksymtab_gpl." $$$$1 ") \\" }'; \
85        echo; \
86        echo '#define SYMTAB_KEEP_STR \'; \
87        cat $(KERNEL_BUILD_DIR)/symtab.txt | \
88            awk '{print "*(__ksymtab_strings." $$$$1 ") \\" }'; \
89        echo; \
90    ) > $$@
91
92  $(STAMP_CONFIGURED): $(STAMP_PREPARED) $(LINUX_CONFIG) $(GENERIC_LINUX_CONFIG) $(TOPDIR)/.config
93    $(Kernel/Configure)
94    touch $$@
95
96  $(LINUX_DIR)/.modules: $(STAMP_CONFIGURED) $(LINUX_DIR)/.config FORCE
97    $(Kernel/CompileModules)
98    touch $$@
99
100  $(LINUX_DIR)/.image: $(STAMP_CONFIGURED) $(if $(CONFIG_STRIP_KERNEL_EXPORTS),$(KERNEL_BUILD_DIR)/symtab.h) FORCE
101    $(Kernel/CompileImage)
102    $(Kernel/CollectDebug)
103    touch $$@
104    
105  mostlyclean: FORCE
106    $(Kernel/Clean)
107
108  define BuildKernel
109  endef
110
111  download: $(DL_DIR)/$(LINUX_SOURCE)
112  prepare: $(STAMP_CONFIGURED)
113  compile: $(LINUX_DIR)/.modules
114    $(MAKE) -C image compile TARGET_BUILD=
115
116  oldconfig menuconfig: $(STAMP_PREPARED) $(STAMP_CHECKED) FORCE
117    [ -e "$(LINUX_CONFIG)" ] || touch "$(LINUX_CONFIG)"
118    $(LINUX_CONFCMD) > $(LINUX_DIR)/.config
119    touch $(LINUX_CONFIG)
120    $(_SINGLE)$(MAKE) -C $(LINUX_DIR) $(KERNEL_MAKEOPTS) $$@
121    $(SCRIPT_DIR)/kconfig.pl '>' $(if $(LINUX_SUBCONFIG),'+' $(GENERIC_LINUX_CONFIG) $(LINUX_CONFIG),$(GENERIC_LINUX_CONFIG)) \
122        $(LINUX_DIR)/.config > $(if $(LINUX_SUBCONFIG),$(LINUX_SUBCONFIG),$(LINUX_CONFIG))
123    $(Kernel/Configure)
124
125  install: $(LINUX_DIR)/.image
126    +$(MAKE) -C image compile install TARGET_BUILD=
127
128  clean: FORCE
129    rm -rf $(KERNEL_BUILD_DIR)
130
131  image-prereq:
132    @+$(NO_TRACE_MAKE) -s -C image prereq TARGET_BUILD=
133
134  prereq: image-prereq
135
136endef
137

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