prepare for the transition to linux 2.6.22 - make it possible to override the kernel...
[openwrt.git] / 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 KERNEL_BUILD:=1
8
9 include $(INCLUDE_DIR)/kernel-version.mk
10 include $(INCLUDE_DIR)/host.mk
11 include $(INCLUDE_DIR)/kernel.mk
12 include $(INCLUDE_DIR)/prereq.mk
13
14 GENERIC_LINUX_CONFIG:=$(GENERIC_PLATFORM_DIR)/config-$(shell [ -f "$(GENERIC_PLATFORM_DIR)/config-$(KERNEL_PATCHVER)" ] && echo "$(KERNEL_PATCHVER)" || echo template ) 
15 LINUX_CONFIG_DIR ?= ./config$(shell [ -d "./config-$(KERNEL_PATCHVER)" ] && printf -- "-$(KERNEL_PATCHVER)" || true )
16 LINUX_CONFIG ?= $(LINUX_CONFIG_DIR)/default
17
18 -include $(GENERIC_LINUX_CONFIG)
19 -include $(LINUX_CONFIG)
20
21 ifneq ($(CONFIG_ATM),)
22   FEATURES += atm
23 endif
24 ifneq ($(CONFIG_PCI),)
25   FEATURES += pci
26 endif
27 ifneq ($(CONFIG_USB),)
28   FEATURES += usb
29 endif
30 ifneq ($(CONFIG_PCMCIA)$(CONFIG_PCCARD),)
31   FEATURES += pcmcia
32 endif
33 ifneq ($(CONFIG_VIDEO_DEV),)
34   FEATURES += video
35 endif
36
37 # remove duplicates
38 FEATURES:=$(sort $(FEATURES))
39
40 ifeq ($(DUMP),1)
41   all: dumpinfo
42 else
43   all: compile
44 endif
45
46 ifneq (,$(findstring uml,$(BOARD)))
47   LINUX_KARCH:=um
48 else
49   LINUX_KARCH:=$(shell echo $(ARCH) | sed -e 's/i[3-9]86/i386/' \
50         -e 's/mipsel/mips/' \
51         -e 's/mipseb/mips/' \
52         -e 's/powerpc/ppc/' \
53         -e 's/sh[234]/sh/' \
54         -e 's/armeb/arm/' \
55   )
56 endif
57
58 STAMP_PREPARED:=$(LINUX_DIR)/.prepared
59 STAMP_CONFIGURED:=$(LINUX_DIR)/.configured
60 include $(INCLUDE_DIR)/quilt.mk
61 include $(INCLUDE_DIR)/kernel-defaults.mk
62
63 define Kernel/Prepare
64         $(call Kernel/Prepare/Default)
65 endef
66
67 define Kernel/Configure
68         $(call Kernel/Configure/Default)
69 endef
70
71 define Kernel/CompileModules
72         $(call Kernel/CompileModules/Default)
73 endef
74
75 define Kernel/CompileImage
76         $(call Kernel/CompileImage/Default)
77 endef
78
79 define Kernel/Clean
80         $(call Kernel/Clean/Default)
81 endef
82
83 define BuildKernel
84   ifneq ($(LINUX_SITE),)
85     $(DL_DIR)/$(LINUX_SOURCE):
86                 -mkdir -p $(DL_DIR)
87                 $(SCRIPT_DIR)/download.pl $(DL_DIR) $(LINUX_SOURCE) $(LINUX_KERNEL_MD5SUM) $(LINUX_SITE)
88   endif
89
90   $(STAMP_PREPARED): $(DL_DIR)/$(LINUX_SOURCE)
91         -rm -rf $(KERNEL_BUILD_DIR)
92         -mkdir -p $(KERNEL_BUILD_DIR)
93         $(call Kernel/Prepare)
94         touch $$@
95
96   $(STAMP_CONFIGURED): $(LINUX_DIR)/.prepared $(LINUX_CONFIG)
97         $(call Kernel/Configure)
98         touch $$@
99
100   $(LINUX_DIR)/.modules: $(LINUX_DIR)/.configured $(LINUX_DIR)/.config FORCE
101         $(call Kernel/CompileModules)
102         touch $$@
103
104   $(LINUX_DIR)/.image: $(LINUX_DIR)/.configured FORCE
105         $(call Kernel/CompileImage)
106         touch $$@
107         
108   mostlyclean: FORCE
109         $(call Kernel/Clean)
110
111   ifeq ($(DUMP),1)
112     dumpinfo:
113                 @echo 'Target: $(BOARD)-$(KERNEL)'
114                 @echo 'Target-Name: $(BOARDNAME) [$(KERNEL)]'
115                 @echo 'Target-Path: $(subst $(TOPDIR)/,,$(PWD))'
116                 @echo 'Target-Arch: $(ARCH)'
117                 @echo 'Target-Features: $(FEATURES)'
118                 @echo 'Linux-Version: $(LINUX_VERSION)'
119                 @echo 'Linux-Release: $(LINUX_RELEASE)'
120                 @echo 'Linux-Kernel-Arch: $(LINUX_KARCH)'
121                 @echo 'Target-Description:'
122                 @getvar $(call shvar,Target/Description)
123                 @echo '@@'
124                 @echo 'Default-Packages: $(DEFAULT_PACKAGES)'
125     ifneq ($(DUMPINFO),)
126                 @$(DUMPINFO)
127     endif
128   endif
129
130   define BuildKernel
131   endef
132 endef
133
134 define Profile/Default
135   NAME:=
136   PACKAGES:=
137 endef
138
139 confname=$(subst .,_,$(subst -,_,$(1)))
140 define Profile
141   $(eval $(call Profile/Default))
142   $(eval $(call Profile/$(1)))
143   $(eval $(call shexport,Profile/$(1)/Config))
144   $(eval $(call shexport,Profile/$(1)/Description))
145   DUMPINFO += \
146         echo "Target-Profile: $(1)"; \
147         echo "Target-Profile-Name: $(NAME)"; \
148         echo "Target-Profile-Packages: $(PACKAGES)"; \
149         if [ -f ./config/profile-$(1) ]; then \
150                 echo "Target-Profile-Kconfig: yes"; \
151         fi; \
152         echo "Target-Profile-Config: "; \
153         getvar "$(call shvar,Profile/$(1)/Config)"; \
154         echo "@@"; \
155         echo "Target-Profile-Description:"; \
156         getvar "$(call shvar,Profile/$(1)/Description)"; \
157         echo "@@"; \
158         echo;
159   ifeq ($(CONFIG_LINUX_$(call confname,$(KERNEL)_$(1))),y)
160     PROFILE=$(1)
161   endif
162 endef
163
164 $(eval $(call shexport,Target/Description))
165
166 download: $(DL_DIR)/$(LINUX_SOURCE)
167 prepare: $(LINUX_DIR)/.configured
168 compile: $(LINUX_DIR)/.modules
169 menuconfig: $(LINUX_DIR)/.prepared FORCE
170         $(call Kernel/Configure)
171         $(SCRIPT_DIR)/config.pl '+' $(GENERIC_LINUX_CONFIG) $(LINUX_CONFIG) > $(LINUX_DIR)/.config
172         $(MAKE) -C $(LINUX_DIR) $(KERNEL_MAKEOPTS) menuconfig
173         $(SCRIPT_DIR)/config.pl '>' $(GENERIC_LINUX_CONFIG) $(LINUX_DIR)/.config > $(LINUX_CONFIG)
174
175 install: $(LINUX_DIR)/.image
176
177 clean: FORCE
178         rm -f $(STAMP_DIR)/.linux-compile
179         rm -rf $(KERNEL_BUILD_DIR)
180
181 rebuild: FORCE
182         @$(MAKE) mostlyclean
183         @if [ -f $(LINUX_KERNEL) ]; then \
184                 $(MAKE) clean; \
185         fi
186         @$(MAKE) compile
187
188