The linux kernel config file is now optional. If none is given, a default one is created using the default target for the given architecture.
1 # This file declares functions to install the kernel headers for linux
2 # Copyright 2007 Yann E. MORIN
3 # Licensed under the GPL v2. See COPYING in the root of this package
5 # Check kernel configuration
6 do_kernel_check_config() {
7 CT_DoStep INFO "Checking kernel configuration"
9 if [ "${CT_KERNEL_LINUX_HEADERS_USE_CUSTOM_DIR}" != "y" \
10 -a \( -z "${CT_KERNEL_LINUX_CONFIG_FILE}" -o ! -r "${CT_KERNEL_LINUX_CONFIG_FILE}" \) ]; then
11 CT_DoLog WARN "You did not provide a kernel configuration file!"
12 CT_DoLog WARN "I will try to generate one for you, but beware!"
14 CT_DoStep INFO "Building a default configuration file for linux kernel"
16 mkdir -p "${CT_BUILD_DIR}/build-kernel-defconfig"
17 cd "${CT_BUILD_DIR}/build-kernel-defconfig"
18 make -C "${CT_SRC_DIR}/${CT_KERNEL_FILE}" O=`pwd` \
19 ARCH=${CT_KERNEL_ARCH} defconfig 2>&1 |CT_DoLog DEBUG
21 CT_KERNEL_LINUX_CONFIG_FILE="`pwd`/.config"
29 # Wrapper to the actual headers install method
31 CT_DoStep INFO "Installing kernel headers"
33 # Special case when using pre-installed headers
34 if [ "${CT_KERNEL_LINUX_HEADERS_USE_CUSTOM_DIR}" = "y" ]; then
35 do_kernel_preinstalled
37 # We need to enter this directory to find the kernel version strings
38 cd "${CT_SRC_DIR}/${CT_KERNEL_FILE}"
39 if [ "${CT_KERNEL_LINUX_HEADERS_SANITISED}" != "y" ]; then
40 k_version=`awk '/^VERSION =/ { print $3 }' Makefile`
41 k_patchlevel=`awk '/^PATCHLEVEL =/ { print $3 }' Makefile`
42 k_sublevel=`awk '/^SUBLEVEL =/ { print $3 }' Makefile`
43 k_extraversion=`awk '/^EXTRAVERSION =/ { print $3 }' Makefile`
45 k_version=`echo "${CT_KERNEL_VERSION}." |cut -d . -f 1`
46 k_patchlevel=`echo "${CT_KERNEL_VERSION}." |cut -d . -f 2`
47 k_sublevel=`echo "${CT_KERNEL_VERSION}." |cut -d . -f 3`
48 k_extraversion=`echo "${CT_KERNEL_VERSION}." |cut -d . -f 4`
51 case "${k_version}.${k_patchlevel}" in
53 *) CT_Abort "Unsupported kernel version \"linux-${k_version}.${k_patchlevel}\".";;
56 # Kernel version that support verbosity will use this, others will ignore it:
57 V_OPT="V=${CT_KERNEL_LINUX_VERBOSE_LEVEL}"
59 if [ "${CT_KERNEL_LINUX_HEADERS_INSTALL}" = "y" ]; then
61 elif [ "${CT_KERNEL_LINUX_HEADERS_SANITISED}" = "y" ]; then
63 else [ "${CT_KERNEL_LINUX_HEADERS_COPY}" = "y" ];
71 # Install kernel headers using headers_install from kernel sources.
73 CT_DoLog EXTRA "Using kernel's headers_install"
75 mkdir -p "${CT_BUILD_DIR}/build-kernel-headers"
76 cd "${CT_BUILD_DIR}/build-kernel-headers"
78 case "${k_version}.${k_patchlevel}" in
79 2.6) [ ${k_sublevel} -ge 18 ] || CT_Abort "Kernel version >= 2.6.18 is needed to install kernel headers.";;
80 *) CT_Abort "Kernel version >= 2.6.18 is needed to install kernel headers.";;
83 CT_DoLog EXTRA "Configuring kernel headers"
84 cp "${CT_KERNEL_LINUX_CONFIG_FILE}" .config
85 CT_DoYes "" |make -C "${CT_SRC_DIR}/${CT_KERNEL_FILE}" \
86 O="${CT_BUILD_DIR}/build-kernel-headers" \
88 ARCH=${CT_KERNEL_ARCH} oldconfig 2>&1 |CT_DoLog DEBUG
90 CT_DoLog EXTRA "Installing kernel headers"
91 make ARCH=${CT_KERNEL_ARCH} \
92 INSTALL_HDR_PATH="${CT_SYSROOT_DIR}/usr" \
94 headers_install 2>&1 |CT_DoLog DEBUG
96 CT_DoLog EXTRA "Checking installed headers"
97 make ARCH=${CT_KERNEL_ARCH} \
98 INSTALL_HDR_PATH="${CT_SYSROOT_DIR}/usr" \
100 headers_check 2>&1 |CT_DoLog DEBUG
103 # Install kernel headers from oldish Mazur's sanitised headers.
104 do_kernel_sanitised() {
105 CT_DoLog EXTRA "Copying sanitised headers"
106 cd "${CT_SRC_DIR}/${CT_KERNEL_FILE}"
107 cp -rv include/linux "${CT_HEADERS_DIR}" 2>&1 |CT_DoLog DEBUG
108 cp -rv "include/asm-${CT_KERNEL_ARCH}" "${CT_HEADERS_DIR}/asm" 2>&1 |CT_DoLog DEBUG
111 # Install kernel headers by plain copy.
113 CT_DoLog EXTRA "Copying plain kernel headers"
114 CT_DoLog WARN "You are using plain kernel headers. You really shouldn't do that."
115 CT_DoLog WARN "You'd be better off by using installed headers (or sanitised headers)."
117 # 2.2 and 2.4 don't support building out-of-tree. 2.6 does.
118 CT_DoLog EXTRA "Preparing kernel headers"
119 case "${k_version}.${k_patchlevel}" in
120 2.2|2.4) cd "${CT_SRC_DIR}/${CT_KERNEL_FILE}"
121 cp "${CT_KERNEL_LINUX_CONFIG_FILE}" .config
122 CT_DoYes "" |make ARCH=${CT_KERNEL_ARCH} oldconfig
123 # 2.4 doesn't follow V=# for verbosity... :-(
124 make ARCH=${CT_KERNEL_ARCH} symlinks include/linux/version.h
126 2.6) mkdir -p "${CT_BUILD_DIR}/build-kernel-headers"
127 cd "${CT_BUILD_DIR}/build-kernel-headers"
128 cp "${CT_KERNEL_LINUX_CONFIG_FILE}" .config
129 CT_DoYes "" |make -C "${CT_SRC_DIR}/${CT_KERNEL_FILE}" \
130 O="`pwd`" ${V_OPT} ARCH=${CT_KERNEL_ARCH} \
132 case "${CT_KERNEL_ARCH}" in
133 sh*) # sh does secret stuff in 'make prepare' that can't be
134 # triggered separately, but happily, it doesn't use
135 # target gcc, so we can use it.
136 # Update: this fails on 2.6.11, as it installs
137 # elfconfig.h, which requires target compiler :-(
138 make ${PARALLELMFLAGS} \
139 ARCH=${CT_KERNEL_ARCH} ${V_OPT} \
140 prepare include/linux/version.h
142 arm*|cris*) make ${PARALLELMFLAGS} \
143 ARCH=${CT_KERNEL_ARCH} ${V_OPT} \
144 include/asm include/linux/version.h \
145 include/asm-${CT_KERNEL_ARCH}/.arch
147 mips*) # for linux-2.6, 'make prepare' for mips doesn't
148 # actually create any symlinks. Hope generic is ok.
149 # Note that glibc ignores all -I flags passed in CFLAGS,
150 # so you have to use -isystem.
151 make ${PARALLELMFLAGS} \
152 ARCH=${CT_KERNEL_ARCH} ${V_OPT} \
153 include/asm include/linux/version.h
154 TARGET_CFLAGS="${TARGET_CFLAGS} -isystem ${LINUX_HEADER_DIR}/include/asm-mips/mach-generic"
156 *) make ${PARALLELMFLAGS} \
157 ARCH=${CT_KERNEL_ARCH} ${V_OPT} \
158 include/asm include/linux/version.h
162 esac 2>&1 |CT_DoLog DEBUG
164 CT_DoLog EXTRA "Copying kernel headers"
165 cp -rv include/asm-generic "${CT_HEADERS_DIR}/asm-generic" 2>&1 |CT_DoLog DEBUG
166 cp -rv include/linux "${CT_HEADERS_DIR}" 2>&1 |CT_DoLog DEBUG
167 cp -rv include/asm-${CT_KERNEL_ARCH} "${CT_HEADERS_DIR}/asm" 2>&1 |CT_DoLog DEBUG
170 # Use preinstalled headers (most probably by using make headers_install in a
171 # modified (read: customised) kernel tree). In this case, simply copy
172 # the headers in place
173 do_kernel_preinstalled() {
174 CT_DoLog EXTRA "Copying preinstalled kernel headers"
176 mkdir -p "${CT_SYSROOT_DIR}/usr"
177 cd "${CT_KERNEL_LINUX_HEADERS_CUSTOM_DIR}"
178 cp -rv include "${CT_SYSROOT_DIR}/usr" 2>&1 |CT_DoLog DEBUG