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