Root/include/kernel-defaults.mk

1#
2# Copyright (C) 2006-2011 OpenWrt.org
3#
4# This is free software, licensed under the GNU General Public License v2.
5# See /LICENSE for more information.
6#
7
8KERNEL_MAKEOPTS := -C $(LINUX_DIR) \
9    HOSTCFLAGS="$(HOST_CFLAGS) -Wall -Wmissing-prototypes -Wstrict-prototypes" \
10    CROSS_COMPILE="$(KERNEL_CROSS)" \
11    ARCH="$(LINUX_KARCH)" \
12    KBUILD_HAVE_NLS=no \
13    CONFIG_SHELL="$(BASH)" \
14    $(if $(findstring c,$(OPENWRT_VERBOSE)),V=1,V='')
15
16ifdef CONFIG_STRIP_KERNEL_EXPORTS
17  KERNEL_MAKEOPTS += \
18    EXTRA_LDSFLAGS="-I$(KERNEL_BUILD_DIR) -include symtab.h"
19endif
20
21INITRAMFS_EXTRA_FILES ?= $(GENERIC_PLATFORM_DIR)/image/initramfs-base-files.txt
22
23ifneq (,$(KERNEL_CC))
24  KERNEL_MAKEOPTS += CC="$(KERNEL_CC)"
25endif
26
27export HOST_EXTRACFLAGS=-I$(STAGING_DIR_HOST)/include
28
29# defined in quilt.mk
30Kernel/Patch:=$(Kernel/Patch/Default)
31ifeq ($(strip $(CONFIG_EXTERNAL_KERNEL_TREE)),"")
32  ifeq ($(strip $(CONFIG_KERNEL_GIT_CLONE_URI)),"")
33    define Kernel/Prepare/Default
34    bzcat $(DL_DIR)/$(LINUX_SOURCE) | $(TAR) -C $(KERNEL_BUILD_DIR) $(TAR_OPTIONS)
35    $(Kernel/Patch)
36    touch $(LINUX_DIR)/.quilt_used
37    endef
38  else
39    ifeq ($(strip $(CONFIG_KERNEL_GIT_LOCAL_REPOSITORY)),"")
40define Kernel/Prepare/Default
41    git clone $(CONFIG_KERNEL_GIT_CLONE_URI) $(LINUX_DIR)
42    endef
43  else
44    define Kernel/Prepare/Default
45    git clone --reference $(CONFIG_KERNEL_GIT_LOCAL_REPOSITORY) $(CONFIG_KERNEL_GIT_CLONE_URI) $(LINUX_DIR)
46    endef
47  endif
48endif
49else
50  define Kernel/Prepare/Default
51    mkdir -p $(KERNEL_BUILD_DIR)
52    if [ -d $(LINUX_DIR) ]; then \
53        rmdir $(LINUX_DIR); \
54    fi
55    ln -s $(CONFIG_EXTERNAL_KERNEL_TREE) $(LINUX_DIR)
56  endef
57endif
58
59ifeq ($(CONFIG_TARGET_ROOTFS_INITRAMFS),y)
60  ifeq ($(strip $(CONFIG_EXTERNAL_CPIO)),"")
61    define Kernel/SetInitramfs
62        mv $(LINUX_DIR)/.config $(LINUX_DIR)/.config.old
63        grep -v -e INITRAMFS -e CONFIG_RD_ -e CONFIG_BLK_DEV_INITRD $(LINUX_DIR)/.config.old > $(LINUX_DIR)/.config
64        echo 'CONFIG_BLK_DEV_INITRD=y' >> $(LINUX_DIR)/.config
65        echo 'CONFIG_INITRAMFS_SOURCE="$(strip $(TARGET_DIR) $(INITRAMFS_EXTRA_FILES))"' >> $(LINUX_DIR)/.config
66        echo 'CONFIG_INITRAMFS_ROOT_UID=$(shell id -u)' >> $(LINUX_DIR)/.config
67        echo 'CONFIG_INITRAMFS_ROOT_GID=$(shell id -g)' >> $(LINUX_DIR)/.config
68        echo "$(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_NONE),CONFIG_INITRAMFS_COMPRESSION_NONE=y,# CONFIG_INITRAMFS_COMPRESSION_NONE is not set)" >> $(LINUX_DIR)/.config
69        echo -e "$(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_GZIP),CONFIG_INITRAMFS_COMPRESSION_GZIP=y\nCONFIG_RD_GZIP=y,# CONFIG_INITRAMFS_COMPRESSION_GZIP is not set\n# CONFIG_RD_GZIP is not set)" >> $(LINUX_DIR)/.config
70        echo -e "$(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_BZIP2),CONFIG_INITRAMFS_COMPRESSION_BZIP2=y\nCONFIG_RD_BZIP2=y,# CONFIG_INITRAMFS_COMPRESSION_BZIP2 is not set\n# CONFIG_RD_BZIP2 is not set)" >> $(LINUX_DIR)/.config
71        echo -e "$(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_LZMA),CONFIG_INITRAMFS_COMPRESSION_LZMA=y\nCONFIG_RD_LZMA=y,# CONFIG_INITRAMFS_COMPRESSION_LZMA is not set\n# CONFIG_RD_LZMA is not set)" >> $(LINUX_DIR)/.config
72        echo -e "$(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_LZO),CONFIG_INITRAMFS_COMPRESSION_LZO=y\nCONFIG_RD_LZO=y,# CONFIG_INITRAMFS_COMPRESSION_LZO is not set\n# CONFIG_RD_LZO is not set)" >> $(LINUX_DIR)/.config
73        echo -e "$(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_XZ),CONFIG_INITRAMFS_COMPRESSION_XZ=y\nCONFIG_RD_XZ=y,# CONFIG_INITRAMFS_COMPRESSION_XZ is not set\n# CONFIG_RD_XZ is not set)" >> $(LINUX_DIR)/.config
74    endef
75  else
76    define Kernel/SetInitramfs
77        mv $(LINUX_DIR)/.config $(LINUX_DIR)/.config.old
78        grep -v INITRAMFS $(LINUX_DIR)/.config.old > $(LINUX_DIR)/.config
79        echo 'CONFIG_INITRAMFS_SOURCE="$(call qstrip,$(CONFIG_EXTERNAL_CPIO))"' >> $(LINUX_DIR)/.config
80        echo 'CONFIG_INITRAMFS_ROOT_UID=$(shell id -u)' >> $(LINUX_DIR)/.config
81        echo 'CONFIG_INITRAMFS_ROOT_GID=$(shell id -g)' >> $(LINUX_DIR)/.config
82        echo "$(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_NONE),CONFIG_INITRAMFS_COMPRESSION_NONE=y,# CONFIG_INITRAMFS_COMPRESSION_NONE is not set)" >> $(LINUX_DIR)/.config
83        echo -e "$(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_GZIP),CONFIG_INITRAMFS_COMPRESSION_GZIP=y\nCONFIG_RD_GZIP=y,# CONFIG_INITRAMFS_COMPRESSION_GZIP is not set\n# CONFIG_RD_GZIP is not set)" >> $(LINUX_DIR)/.config
84        echo -e "$(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_BZIP2),CONFIG_INITRAMFS_COMPRESSION_BZIP2=y\nCONFIG_RD_BZIP2=y,# CONFIG_INITRAMFS_COMPRESSION_BZIP2 is not set\n# CONFIG_RD_BZIP2 is not set)" >> $(LINUX_DIR)/.config
85        echo -e "$(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_LZMA),CONFIG_INITRAMFS_COMPRESSION_LZMA=y\nCONFIG_RD_LZMA=y,# CONFIG_INITRAMFS_COMPRESSION_LZMA is not set\n# CONFIG_RD_LZMA is not set)" >> $(LINUX_DIR)/.config
86        echo -e "$(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_LZO),CONFIG_INITRAMFS_COMPRESSION_LZO=y\nCONFIG_RD_LZO=y,# CONFIG_INITRAMFS_COMPRESSION_LZO is not set\n# CONFIG_RD_LZO is not set)" >> $(LINUX_DIR)/.config
87        echo -e "$(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_XZ),CONFIG_INITRAMFS_COMPRESSION_XZ=y\nCONFIG_RD_XZ=y,# CONFIG_INITRAMFS_COMPRESSION_XZ is not set\n# CONFIG_RD_XZ is not set)" >> $(LINUX_DIR)/.config
88    endef
89  endif
90else
91    define Kernel/SetInitramfs
92        mv $(LINUX_DIR)/.config $(LINUX_DIR)/.config.old
93        grep -v INITRAMFS $(LINUX_DIR)/.config.old > $(LINUX_DIR)/.config
94        echo 'CONFIG_INITRAMFS_SOURCE=""' >> $(LINUX_DIR)/.config
95    endef
96endif
97
98define Kernel/Configure/Default
99    $(LINUX_CONF_CMD) > $(LINUX_DIR)/.config.target
100# copy CONFIG_KERNEL_* settings over to .config.target
101    awk '/^(#[[:space:]]+)?CONFIG_KERNEL/{sub("CONFIG_KERNEL_","CONFIG_");print}' $(TOPDIR)/.config >> $(LINUX_DIR)/.config.target
102    echo "# CONFIG_KALLSYMS_EXTRA_PASS is not set" >> $(LINUX_DIR)/.config.target
103    echo "# CONFIG_KALLSYMS_ALL is not set" >> $(LINUX_DIR)/.config.target
104    echo "# CONFIG_KPROBES is not set" >> $(LINUX_DIR)/.config.target
105    $(SCRIPT_DIR)/metadata.pl kconfig $(TMP_DIR)/.packageinfo $(TOPDIR)/.config > $(LINUX_DIR)/.config.override
106    $(SCRIPT_DIR)/kconfig.pl 'm+' '+' $(LINUX_DIR)/.config.target /dev/null $(LINUX_DIR)/.config.override > $(LINUX_DIR)/.config
107    $(call Kernel/SetInitramfs)
108    rm -rf $(KERNEL_BUILD_DIR)/modules
109    [ -d $(LINUX_DIR)/user_headers ] || $(MAKE) $(KERNEL_MAKEOPTS) INSTALL_HDR_PATH=$(LINUX_DIR)/user_headers headers_install
110    $(SH_FUNC) grep '=[ym]' $(LINUX_DIR)/.config | LC_ALL=C sort | md5s > $(LINUX_DIR)/.vermagic
111endef
112
113define Kernel/CompileModules/Default
114    rm -f $(LINUX_DIR)/vmlinux $(LINUX_DIR)/System.map
115    +$(MAKE) $(KERNEL_MAKEOPTS) modules
116endef
117
118OBJCOPY_STRIP = -R .reginfo -R .notes -R .note -R .comment -R .mdebug -R .note.gnu.build-id
119
120define Kernel/CompileImage/Default
121    $(if $(CONFIG_TARGET_ROOTFS_INITRAMFS),,rm -f $(TARGET_DIR)/init)
122    +$(MAKE) $(KERNEL_MAKEOPTS) $(subst ",,$(KERNELNAME))
123    $(KERNEL_CROSS)objcopy -O binary $(OBJCOPY_STRIP) -S $(LINUX_DIR)/vmlinux $(LINUX_KERNEL)
124    $(KERNEL_CROSS)objcopy $(OBJCOPY_STRIP) -S $(LINUX_DIR)/vmlinux $(KERNEL_BUILD_DIR)/vmlinux.elf
125endef
126
127define Kernel/Clean/Default
128    rm -f $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION)/.configured
129    rm -f $(LINUX_KERNEL)
130    $(_SINGLE)$(MAKE) -C $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION) clean
131endef
132
133
134

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