don't specify "CC=<nothing>" on kernel build command line
[openwrt/openwrt.git] / include / kernel.mk
1 #
2 # Copyright (C) 2006 OpenWrt.org
3 #
4 # This is free software, licensed under the GNU General Public License v2.
5 # See /LICENSE for more information.
6 #
7
8 ifeq ($(__target_inc),)
9 include $(INCLUDE_DIR)/target.mk
10 endif
11
12 ifeq ($(DUMP),1)
13 KERNEL?=<KERNEL>
14 BOARD?=<BOARD>
15 LINUX_VERSION?=<LINUX_VERSION>
16 else
17 export GCC_HONOUR_COPTS=s
18
19 ifeq ($(KERNEL),2.6)
20 LINUX_KMOD_SUFFIX=ko
21 else
22 LINUX_KMOD_SUFFIX=o
23 endif
24
25 ifneq (,$(findstring uml,$(BOARD)))
26 KERNEL_CC?=$(HOSTCC)
27 KERNEL_CROSS?=
28 else
29 KERNEL_CC?=$(TARGET_CC)
30 KERNEL_CROSS?=$(TARGET_CROSS)
31 endif
32
33 PATCH_DIR ?= ./patches$(shell [ -d "./patches-$(KERNEL_PATCHVER)" ] && printf -- "-$(KERNEL_PATCHVER)" || true )
34 KERNEL_BUILD_DIR ?= $(BUILD_DIR_BASE)/linux-$(BOARD)$(if $(SUBTARGET),_$(SUBTARGET))$(if $(BUILD_SUFFIX),_$(BUILD_SUFFIX))
35 LINUX_DIR ?= $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION)
36
37 MODULES_SUBDIR:=lib/modules/$(LINUX_VERSION)
38 TARGET_MODULES_DIR := $(LINUX_TARGET_DIR)/$(MODULES_SUBDIR)
39
40 LINUX_KERNEL:=$(KERNEL_BUILD_DIR)/vmlinux
41
42 LINUX_SOURCE:=linux-$(LINUX_VERSION).tar.bz2
43 TESTING:=$(if $(findstring -rc,$(LINUX_VERSION)),/testing,)
44 LINUX_SITE:=@KERNEL/linux/kernel/v$(KERNEL)$(TESTING) \
45
46 ifneq ($(TARGET_BUILD),1)
47 PKG_BUILD_DIR ?= $(KERNEL_BUILD_DIR)/$(PKG_NAME)$(if $(PKG_VERSION),-$(PKG_VERSION))
48 endif
49 endif
50
51 ifneq (,$(findstring uml,$(BOARD)))
52 LINUX_KARCH:=um
53 else
54 ifeq (,$(LINUX_KARCH))
55 LINUX_KARCH:=$(shell echo $(ARCH) | sed -e 's/i[3-9]86/i386/' \
56 -e 's/mipsel/mips/' \
57 -e 's/mipseb/mips/' \
58 -e 's/sh[234]/sh/' \
59 -e 's/armeb/arm/' \
60 )
61 endif
62 endif
63
64
65 define KernelPackage/Defaults
66 FILES:=
67 AUTOLOAD:=
68 endef
69
70 define ModuleAutoLoad
71 export modules=; \
72 add_module() { \
73 mkdir -p $(2)/etc/modules.d; \
74 ( \
75 for mod in $$$$$$$$2; do \
76 getvar mod; \
77 done \
78 ) > $(2)/etc/modules.d/$$$$$$$$1-$(1); \
79 modules="$$$$$$$${modules:+$$$$$$$$modules }$$$$$$$$1-$(1)"; \
80 }; \
81 $(3) \
82 if [ -n "$$$$$$$$modules" ]; then \
83 mkdir -p $(2)/etc/modules.d; \
84 echo "#!/bin/sh" > $(2)/CONTROL/postinst; \
85 echo "[ -z \"\$$$$$$$$IPKG_INSTROOT\" ] || exit 0" >> $(2)/CONTROL/postinst; \
86 echo ". /etc/functions.sh" >> $(2)/CONTROL/postinst; \
87 echo "load_modules $$$$$$$$modules" >> $(2)/CONTROL/postinst; \
88 chmod 0755 $(2)/CONTROL/postinst; \
89 fi
90 endef
91
92
93 define KernelPackage
94 NAME:=$(1)
95 $(eval $(call Package/Default))
96 $(eval $(call KernelPackage/Defaults))
97 $(eval $(call KernelPackage/$(1)))
98 $(eval $(call KernelPackage/$(1)/$(KERNEL)))
99 $(eval $(call KernelPackage/$(1)/$(BOARD)-$(KERNEL)))
100
101 define Package/kmod-$(1)
102 TITLE:=$(TITLE)
103 SECTION:=kernel
104 CATEGORY:=Kernel modules
105 DESCRIPTION:=$(DESCRIPTION)
106 EXTRA_DEPENDS:=kernel (=$(LINUX_VERSION)-$(BOARD)-$(LINUX_RELEASE))
107 VERSION:=$(LINUX_VERSION)$(if $(PKG_VERSION),+$(PKG_VERSION))-$(BOARD)-$(if $(PKG_RELEASE),$(PKG_RELEASE),$(LINUX_RELEASE))
108 $(call KernelPackage/$(1))
109 $(call KernelPackage/$(1)/$(KERNEL))
110 $(call KernelPackage/$(1)/$(BOARD)-$(KERNEL))
111 endef
112
113 ifdef KernelPackage/$(1)/description
114 define Package/kmod-$(1)/description
115 $(call KernelPackage/$(1)/description)
116 endef
117 endif
118
119 ifneq ($(if $(KCONFIG),$(filter m,$(foreach c,$(filter-out %=y %=n %=m,$(KCONFIG)),$($(c)))),.),)
120 ifneq ($(strip $(FILES)),)
121 define Package/kmod-$(1)/install
122 mkdir -p $$(1)/lib/modules/$(LINUX_VERSION)
123 $(CP) -L $$(FILES) $$(1)/lib/modules/$(LINUX_VERSION)/
124 $(call ModuleAutoLoad,$(1),$$(1),$(AUTOLOAD))
125 $(call KernelPackage/$(1)/install,$$(1))
126 endef
127 endif
128 $(if $(CONFIG_PACKAGE_kmod-$(1)),
129 else
130 compile: kmod-$(1)-unavailable
131 kmod-$(1)-unavailable:
132 @echo "WARNING: kmod-$(1) is not available in the kernel config"
133 )
134 endif
135 $$(eval $$(call BuildPackage,kmod-$(1)))
136
137 $$(IPKG_kmod-$(1)): $$(wildcard $$(FILES))
138 endef
139
140 define AutoLoad
141 add_module $(1) "$(2)";
142 endef
143