# 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

 CT_DoKernelTupleValues() {

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

         CT_TARGET_KERNEL="linux"

     else

         CT_TARGET_KERNEL="uclinux"

     fi

 }

 # Download the kernel

 do_kernel_get() {

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

         CT_GetFile "linux-${CT_KERNEL_VERSION}" \

                    {ftp,http}://ftp.{de.,eu.,}kernel.org/pub/linux/kernel/v2.{6{,/testing},4,2}

     fi

     return 0

 }

 # Extract kernel

 do_kernel_extract() {

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

         CT_Extract "linux-${CT_KERNEL_VERSION}"

         CT_Patch "linux-${CT_KERNEL_VERSION}"

     fi

     return 0

 }

 # Wrapper to the actual headers install method

 do_kernel_headers() {

     CT_DoStep INFO "Installing kernel headers"

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

         do_kernel_custom

     else

         do_kernel_install

     fi

     CT_EndStep

 }

 # Install kernel headers using headers_install from kernel sources.

 do_kernel_install() {

     CT_DoLog DEBUG "Using kernel's headers_install"

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

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

     # Only starting with 2.6.18 does headers_install is usable. We only

     # have 2.6 version available, so only test for sublevel.

     k_sublevel=$(awk '/^SUBLEVEL =/ { print $3 }' "${CT_SRC_DIR}/linux-${CT_KERNEL_VERSION}/Makefile")

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

     V_OPT="V=${CT_KERNEL_LINUX_VERBOSE_LEVEL}"

     CT_DoLog EXTRA "Installing kernel headers"

     CT_DoExecLog ALL                                    \

     make -C "${CT_SRC_DIR}/linux-${CT_KERNEL_VERSION}"  \

          O=$(pwd)                                       \

          ARCH=${CT_KERNEL_ARCH}                         \

          INSTALL_HDR_PATH="${CT_SYSROOT_DIR}/usr"       \

          ${V_OPT}                                       \

          headers_install

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

         CT_DoLog EXTRA "Checking installed headers"

         CT_DoExecLog ALL                                    \

         make -C "${CT_SRC_DIR}/linux-${CT_KERNEL_VERSION}"  \

              O=$(pwd)                                       \

              ARCH=${CT_KERNEL_ARCH}                         \

              INSTALL_HDR_PATH="${CT_SYSROOT_DIR}/usr"       \

              ${V_OPT}                                       \

              headers_check

         find "${CT_SYSROOT_DIR}" -type f -name '.check*' -exec rm {} \;

     fi

 }

 # Use custom headers (most probably by using make headers_install in a

 # modified (read: customised) kernel tree, or using pre-2.6.18 headers, such

 # as 2.4). In this case, simply copy the headers in place

 do_kernel_custom() {

     local tar_opt

     CT_DoLog EXTRA "Installing custom kernel headers"

     mkdir -p "${CT_SYSROOT_DIR}/usr"

     cd "${CT_SYSROOT_DIR}/usr"

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

         case "${CT_KERNEL_LINUX_CUSTOM_PATH}" in

             *.tar)      ;;

             *.tgz)      tar_opt=--gzip;;

             *.tar.gz)   tar_opt=--gzip;;

             *.tar.bz2)  tar_opt=--bzip2;;

             *.tar.lzma) tar_opt=--lzma;;

         esac

         CT_DoExecLog ALL tar x ${tar_opt} -vf ${CT_KERNEL_LINUX_CUSTOM_PATH}

     else

         CT_DoExecLog ALL cp -rv "${CT_KERNEL_LINUX_CUSTOM_PATH}/include" .

     fi

 }