# This file declares functions to install the kernel headers for linux

 # Copyright 2007 Yann E. MORIN

 # Licensed under the GPL v2. See COPYING in the root of this package

 # Check kernel configuration

 do_kernel_check_config() {

     CT_DoStep INFO "Checking kernel configuration"

     CT_TestOrAbort "You did not provide a kernel config file!" -n "${CT_KERNEL_LINUX_CONFIG_FILE}" -a -f "${CT_KERNEL_LINUX_CONFIG_FILE}"

     CT_EndStep

 }

 # Wrapper to the actual headers install method

 do_kernel_headers() {

     CT_DoStep INFO "Installing kernel headers"

     # We need to enter this directory to find the kernel version strings

     cd "${CT_SRC_DIR}/${CT_KERNEL_FILE}"

     if [ "${CT_KERNEL_LINUX_HEADERS_SANITISED}" != "y" ]; then

         k_version=`awk '/^VERSION =/ { print $3 }' Makefile`

         k_patchlevel=`awk '/^PATCHLEVEL =/ { print $3 }' Makefile`

         k_sublevel=`awk '/^SUBLEVEL =/ { print $3 }' Makefile`

         k_extraversion=`awk '/^EXTRAVERSION =/ { print $3 }' Makefile`

     else

         k_version=`echo "${CT_KERNEL_VERSION}." |cut -d . -f 1`

         k_patchlevel=`echo "${CT_KERNEL_VERSION}." |cut -d . -f 2`

         k_sublevel=`echo "${CT_KERNEL_VERSION}." |cut -d . -f 3`

         k_extraversion=`echo "${CT_KERNEL_VERSION}." |cut -d . -f 4`

     fi

     case "${k_version}.${k_patchlevel}" in

         2.2|2.4|2.6) ;;

         *)  CT_Abort "Unsupported kernel version \"linux-${k_version}.${k_patchlevel}\".";;

     esac

     # Kernel version that support verbosity will use this, others will ignore it:

     V_OPT="V=${CT_KERNEL_LINUX_VERBOSE_LEVEL}"

     if [ "${CT_KERNEL_LINUX_HEADERS_INSTALL}" = "y" ]; then

         do_kernel_install

     elif [ "${CT_KERNEL_LINUX_HEADERS_SANITISED}" = "y" ]; then

         do_kernel_sanitised

     else [ "${CT_KERNEL_LINUX_HEADERS_COPY}" = "y" ];

         do_kernel_copy

     fi

     CT_EndStep

 }

 # Install kernel headers using headers_install from kernel sources.

 do_kernel_install() {

     CT_DoLog EXTRA "Using kernel's headers_install"

     mkdir -p "${CT_BUILD_DIR}/build-kernel-headers"

     cd "${CT_BUILD_DIR}/build-kernel-headers"

     case "${k_version}.${k_patchlevel}" in

         2.6) [ ${k_sublevel} -ge 18 ] || CT_Abort "Kernel version >= 2.6.18 is needed to install kernel headers.";;

         *)   CT_Abort "Kernel version >= 2.6.18 is needed to install kernel headers.";;

     esac

     CT_DoLog EXTRA "Configuring kernel headers"

     cp "${CT_KERNEL_LINUX_CONFIG_FILE}" .config

     CT_DoYes "" |make -C "${CT_SRC_DIR}/${CT_KERNEL_FILE}"      \

                       O="${CT_BUILD_DIR}/build-kernel-headers"  \

                       ${V_OPT}                                  \

                       ARCH=${CT_KERNEL_ARCH} oldconfig          2>&1 |CT_DoLog DEBUG

     CT_DoLog EXTRA "Installing kernel headers"

     make ARCH=${CT_KERNEL_ARCH}                     \

          INSTALL_HDR_PATH="${CT_SYSROOT_DIR}/usr"   \

          ${V_OPT}                                   \

          headers_install                            2>&1 |CT_DoLog DEBUG

     CT_DoLog EXTRA "Checking installed headers"

     make ARCH=${CT_KERNEL_ARCH}                     \

          INSTALL_HDR_PATH="${CT_SYSROOT_DIR}/usr"   \

          ${V_OPT}                                   \

          headers_check                              2>&1 |CT_DoLog DEBUG

 }

 # Install kernel headers from oldish Mazur's sanitised headers.

 do_kernel_sanitised() {

     CT_DoLog EXTRA "Copying sanitised headers"

     cd "${CT_SRC_DIR}/${CT_KERNEL_FILE}"

     cp -rv include/linux "${CT_HEADERS_DIR}" 2>&1 |CT_DoLog DEBUG

     cp -rv "include/asm-${CT_KERNEL_ARCH}" "${CT_HEADERS_DIR}/asm" 2>&1 |CT_DoLog DEBUG

 }

 # Install kernel headers by plain copy.

 do_kernel_copy() {

     CT_DoLog EXTRA "Copying plain kernel headers"

     CT_DoLog WARN "You are using plain kernel headers. You really shouldn't do that."

     CT_DoLog WARN "You'd be better off by using installed headers (or sanitised headers)."

     # 2.2 and 2.4 don't support building out-of-tree. 2.6 does.

     CT_DoLog EXTRA "Preparing kernel headers"

     case "${k_version}.${k_patchlevel}" in

         2.2|2.4) cd "${CT_SRC_DIR}/${CT_KERNEL_FILE}"

                  cp "${CT_KERNEL_LINUX_CONFIG_FILE}" .config

                  CT_DoYes "" |make ARCH=${CT_KERNEL_ARCH} oldconfig

                  # 2.4 doesn't follow V=# for verbosity... :-(

                  make ARCH=${CT_KERNEL_ARCH} symlinks include/linux/version.h

                  ;;

         2.6)     mkdir -p "${CT_BUILD_DIR}/build-kernel-headers"

                  cd "${CT_BUILD_DIR}/build-kernel-headers"

                  cp "${CT_KERNEL_LINUX_CONFIG_FILE}" .config

                  CT_DoYes "" |make -C "${CT_SRC_DIR}/${CT_KERNEL_FILE}"         \

                                    O="`pwd`" ${V_OPT} ARCH=${CT_KERNEL_ARCH}    \

                                    oldconfig

                  case "${CT_KERNEL_ARCH}" in

                      sh*)        # sh does secret stuff in 'make prepare' that can't be

                                  # triggered separately, but happily, it doesn't use

                                  # target gcc, so we can use it.

                                  # Update: this fails on 2.6.11, as it installs

                                  # elfconfig.h, which requires target compiler :-(

                                  make ${PARALLELMFLAGS}                 \

                                       ARCH=${CT_KERNEL_ARCH} ${V_OPT}   \

                                       prepare include/linux/version.h

                                  ;;

                      arm*|cris*) make ${PARALLELMFLAGS}                 \

                                       ARCH=${CT_KERNEL_ARCH} ${V_OPT}       \

                                       include/asm include/linux/version.h   \

                                       include/asm-${CT_KERNEL_ARCH}/.arch

                                  ;;

                      mips*)      # for linux-2.6, 'make prepare' for mips doesn't 

                                  # actually create any symlinks.  Hope generic is ok.

                                  # Note that glibc ignores all -I flags passed in CFLAGS,

                                  # so you have to use -isystem.

                                  make ${PARALLELMFLAGS}                 \

                                       ARCH=${CT_KERNEL_ARCH} ${V_OPT}   \

                                       include/asm include/linux/version.h

                                  TARGET_CFLAGS="${TARGET_CFLAGS} -isystem ${LINUX_HEADER_DIR}/include/asm-mips/mach-generic"

                                  ;;

                      *)          make ${PARALLELMFLAGS}                 \

                                       ARCH=${CT_KERNEL_ARCH} ${V_OPT}   \

                                       include/asm include/linux/version.h

                                  ;;

                  esac

                  ;;

     esac 2>&1 |CT_DoLog DEBUG

     CT_DoLog EXTRA "Copying kernel headers"

     cp -rv include/asm-generic "${CT_HEADERS_DIR}/asm-generic" 2>&1 |CT_DoLog DEBUG

     cp -rv include/linux "${CT_HEADERS_DIR}" 2>&1 |CT_DoLog DEBUG

     cp -rv include/asm-${CT_KERNEL_ARCH} "${CT_HEADERS_DIR}/asm" 2>&1 |CT_DoLog DEBUG

 }