# 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

     # Sometime, noMMU linux targets have a -uclinux tuple, while

     # sometime it's -linux. We currently have only one noMMU linux

     # target, and it uses -linux, so let's just use that. Time

     # to fix that later...

     #    CT_TARGET_KERNEL="uclinux"

         CT_TARGET_KERNEL="linux"

     fi

 }

 # Download the kernel

 do_kernel_get() {

     local k_ver

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

          -a "${CT_KERNEL_LINUX_CUSTOM}" != "y"  \

        ]; then

         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

         CT_GetFile "linux-${CT_KERNEL_VERSION}"                                             \

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

                    http://ftp.{de.,eu.,}kernel.org/pub/linux/kernel/v3.0                    \

                    http://ftp.{de.,eu.,}kernel.org/pub/linux/kernel/v2.6/longterm/v${k_ver} \

                    http://ftp.{de.,eu.,}kernel.org/pub/linux/kernel/v3.0/longterm/v${k_ver}

     fi

 }

 # Extract kernel

 do_kernel_extract() {

     local tar_opt

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

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

             # We extract the custom linux tree into a directory with a

             # well-known name, and strip the leading directory component

             # of the extracted pathes. This is needed because we do not

             # know the value for this first component, because it is a

             # _custom_ tree.

             # Also, we have to protect from partial extraction using the

             # .extracting and .extracted locks (not using .patching and

             # .patched as we are *not* patching that kernel).

             if [ -e "${CT_SRC_DIR}/.linux-custom.extracted" ]; then

                 CT_DoLog DEBUG "Custom linux kernel tree already extracted"

                 return 0

             fi

             CT_TestAndAbort "Custom kernel tree partially extracted. Remove before resuming" -f "${CT_SRC_DIR}/.linux-custom.extracting"

             CT_DoExecLog DEBUG touch "${CT_SRC_DIR}/.linux-custom.extracting"

             CT_DoExecLog DEBUG mkdir "${CT_SRC_DIR}/linux-custom"

             case "${CT_KERNEL_LINUX_CUSTOM_TARBALL}" in

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

                 *.tar.gz|*.tgz) tar_opt=-z;;

                 *.tar)          ;;

                 *)              CT_Abort "Don't know how to handle '${CT_KERNEL_LINUX_CUSTOM_TARBALL}': unknown extension";;

             esac

             CT_DoLog EXTRA "Extracting custom linux kernel"

             CT_DoExecLog ALL tar x -C "${CT_SRC_DIR}/linux-custom"      \

                                  --strip-components 1 -v ${tar_opt}     \

                                  -f "${CT_KERNEL_LINUX_CUSTOM_TARBALL}"

             CT_DoExecLog ALL mv -v "${CT_SRC_DIR}/.linux-custom.extracting" "${CT_SRC_DIR}/.linux-custom.extracted"

         else

             CT_Extract "linux-${CT_KERNEL_VERSION}"

             CT_Patch "linux" "${CT_KERNEL_VERSION}"

         fi

     fi

 }

 # Wrapper to the actual headers install method

 do_kernel_headers() {

     CT_DoStep INFO "Installing kernel headers"

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

         do_kernel_install

     else

         do_kernel_custom

     fi

     CT_EndStep

 }

 # Install kernel headers using headers_install from kernel sources.

 do_kernel_install() {

     local kernel_path

     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}"

     CT_DoLog EXTRA "Installing kernel headers"

     CT_DoExecLog ALL                                    \

     make -C "${kernel_path}"                            \

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

          ARCH=${CT_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=${CT_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.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

 }