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