LXR dpdk/kernel/linux/meson.build

   1# SPDX-License-Identifier: BSD-3-Clause
   2# Copyright(c) 2018 Intel Corporation
   3
   4subdirs = ['kni']
   5
   6kernel_build_dir = get_option('kernel_dir')
   7kernel_source_dir = get_option('kernel_dir')
   8kernel_install_dir = ''
   9install = not meson.is_cross_build()
  10cross_args = []
  11
  12if not meson.is_cross_build()
  13    # native build
  14    kernel_version = run_command('uname', '-r', check: true).stdout().strip()
  15    if kernel_source_dir != ''
  16        # Try kernel release from sources first
  17        r = run_command('make', '-s', '-C', kernel_source_dir, 'kernelrelease', check: false)
  18        if r.returncode() == 0
  19            kernel_version = r.stdout().strip()
  20        endif
  21    else
  22        # use default path for native builds
  23        kernel_source_dir = '/lib/modules/' + kernel_version + '/source'
  24    endif
  25    kernel_install_dir = '/lib/modules/' + kernel_version + '/extra/dpdk'
  26    if kernel_build_dir == ''
  27        # use default path for native builds
  28        kernel_build_dir = '/lib/modules/' + kernel_version + '/build'
  29    endif
  30
  31    # test running make in kernel directory, using "make kernelversion"
  32    make_returncode = run_command('make', '-sC', kernel_build_dir,
  33            'kernelversion', check: true).returncode()
  34    if make_returncode != 0
  35        # backward compatibility:
  36        # the headers could still be in the 'build' subdir
  37        if not kernel_build_dir.endswith('build') and not kernel_build_dir.endswith('build/')
  38            kernel_build_dir = join_paths(kernel_build_dir, 'build')
  39            make_returncode = run_command('make', '-sC', kernel_build_dir,
  40                    'kernelversion', check: true).returncode()
  41        endif
  42    endif
  43
  44    if make_returncode != 0
  45        error('Cannot compile kernel modules as requested - are kernel headers installed?')
  46    endif
  47
  48    # DO ACTUAL MODULE BUILDING
  49    foreach d:subdirs
  50        subdir(d)
  51    endforeach
  52
  53    subdir_done()
  54endif
  55
  56# cross build
  57# if we are cross-compiling we need kernel_build_dir specified
  58if kernel_build_dir == ''
  59    error('Need "kernel_dir" option for kmod compilation when cross-compiling')
  60endif
  61cross_compiler = find_program('c').path()
  62if cross_compiler.endswith('gcc')
  63    cross_prefix = run_command([py3, '-c', 'print("' + cross_compiler + '"[:-3])'],
  64            check: true).stdout().strip()
  65elif cross_compiler.endswith('clang')
  66    cross_prefix = ''
  67    found_target = false
  68    # search for '-target' and use the arg that follows
  69    # (i.e. the value of '-target') as cross_prefix
  70    foreach cross_c_arg : meson.get_cross_property('c_args')
  71        if found_target and cross_prefix == ''
  72            cross_prefix = cross_c_arg
  73        endif
  74        if cross_c_arg == '-target'
  75            found_target = true
  76        endif
  77    endforeach
  78    if cross_prefix == ''
  79        error('Did not find -target and its value in c_args in input cross-file.')
  80    endif
  81    linker = 'lld'
  82    foreach cross_c_link_arg : meson.get_cross_property('c_link_args')
  83        if cross_c_link_arg.startswith('-fuse-ld')
  84            linker = cross_c_link_arg.split('=')[1]
  85        endif
  86    endforeach
  87    cross_args += ['CC=@0@'.format(cross_compiler), 'LD=ld.@0@'.format(linker)]
  88else
  89    error('Unsupported cross compiler: @0@'.format(cross_compiler))
  90endif
  91
  92cross_arch = host_machine.cpu_family()
  93if host_machine.cpu_family() == 'aarch64'
  94    cross_arch = 'arm64'
  95endif
  96
  97cross_args += ['ARCH=@0@'.format(cross_arch),
  98        'CROSS_COMPILE=@0@'.format(cross_prefix)]
  99
 100# DO ACTUAL MODULE BUILDING
 101foreach d:subdirs
 102    subdir(d)
 103endforeach
 104