# 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

         # Some no-mmu linux targets requires a -uclinux tuple (like m68k/cf),

         # while others must have a -linux tuple (like bfin).  Other targets

         # should be added here when someone starts to care about them.

         case "${CT_ARCH}" in

             blackfin)   CT_TARGET_KERNEL="linux" ;;

             m68k)       CT_TARGET_KERNEL="uclinux" ;;

             *)          CT_Abort "Unsupported no-mmu arch '${CT_ARCH}'"

         esac

     fi

 }

 # Download the kernel

 do_kernel_get() {

     local k_ver

     local custom_name

     local rel_dir

     local korg_base mirror_base

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

         return 0

     fi

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

         CT_GetCustom "linux" "${CT_KERNEL_VERSION}"     \

                      "${CT_KERNEL_LINUX_CUSTOM_LOCATION}"

     else # Not a custom tarball

         case "${CT_KERNEL_VERSION}" in

             2.6.*.*|3.*.*)

                 # 4-part versions (for 2.6 stables and long-terms), and

                 # 3-part versions (for 3.x.y stables and long-terms),

                 # we need to trash the last digit

                 k_ver="${CT_KERNEL_VERSION%.*}"

                 ;;

             2.6.*|3.*)

                 # 3-part version (for 2.6.x initial releases), and 2-part

                 # versions (for 3.x initial releases), use all of it

                 k_ver="${CT_KERNEL_VERSION}"

                 ;;

         esac

         case "${CT_KERNEL_VERSION}" in

             2.6.*)  rel_dir=v2.6;;

             3.*)    rel_dir=v3.x;;

         esac

         korg_base="http://ftp.kernel.org/pub/linux/kernel/${rel_dir}"

         CT_GetFile "linux-${CT_KERNEL_VERSION}"         \

                    "${korg_base}"                       \

                    "${korg_base}/longterm/v${k_ver}"    \

                    "${korg_base}/longterm"

     fi

 }

 # Extract kernel

 do_kernel_extract() {

     # If using a custom headers tree, nothing to do

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

         return 0

     fi

     # If using a custom directory location, nothing to do

     if [ "${CT_KERNEL_LINUX_CUSTOM}" = "y"    \

          -a -d "${CT_SRC_DIR}/linux-${CT_KERNEL_VERSION}" ]; then

         return 0

     fi

     # Otherwise, we're using either a mainstream tarball, or a custom

     # tarball; in either case, we need to extract

     CT_Extract "linux-${CT_KERNEL_VERSION}"

     # If using a custom tarball, no need to patch

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

         return 0

     fi

     CT_Patch "linux" "${CT_KERNEL_VERSION}"

 }

 # 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() {

     local kernel_path

     local kernel_arch

     CT_DoLog DEBUG "Using kernel's headers_install"

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

     kernel_path="${CT_SRC_DIR}/linux-${CT_KERNEL_VERSION}"

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

         kernel_path="${CT_SRC_DIR}/linux-custom"

     fi

     V_OPT="V=${CT_KERNEL_LINUX_VERBOSE_LEVEL}"

     kernel_arch="${CT_ARCH}"

     case "${CT_ARCH}:${CT_ARCH_BITNESS}" in

         # ARM 64 (aka AArch64) is special

         arm:64) kernel_arch="arm64";;

     esac

     CT_DoLog EXTRA "Installing kernel headers"

     CT_DoExecLog ALL                                    \

     make -C "${kernel_path}"                            \

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

          ARCH=${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 "${kernel_path}"                            \

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

              ARCH=${kernel_arch}                            \

              INSTALL_HDR_PATH="${CT_SYSROOT_DIR}/usr"       \

              ${V_OPT}                                       \

              headers_check

     fi

     # Cleanup

     find "${CT_SYSROOT_DIR}" -type f                        \

                              \(    -name '.install'         \

                                 -o -name '..install.cmd'    \

                                 -o -name '.check'           \

                                 -o -name '..check.cmd'      \

                              \)                             \

                              -exec rm {} \;

 }

 # 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.xz)   tar_opt=--xz;;

         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

 }