scripts/built-in.sh

   1 #!/bin/bash
   2 # SPDX-License-Identifier: (GPL-2.0 OR LGPL-2.1)
   3
   4 set -e
   5
   6 usage() {
   7         echo "usage: $0 <kernel source tree>" >&2
   8         exit 1
   9 }
  10
  11 [ "$#" -eq 1 ] || usage
  12 KERNEL_DIR="$(readlink --canonicalize-existing "$1")"
  13
  14 # Symlink the lttng-modules directory in the kernel source
  15 ln -sf "$(pwd)" "${KERNEL_DIR}/lttng"
  16
  17 # Graft ourself to the kernel build system
  18 echo 'source "lttng/Kconfig"' >> "${KERNEL_DIR}/Kconfig"
  19 sed -i 's#+= kernel/#+= kernel/ lttng/#' "${KERNEL_DIR}/Makefile"
  20
  21 echo >&2
  22 echo "    $0: done." >&2
  23 echo "    $0: now you can build the kernel with LTTng support." >&2
  24 echo "    $0: make sure you enable it (CONFIG_LTTNG) before building." >&2
  25 echo >&2