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# SPDX-License-Identifier: LGPL-2.1-or-later
if conf.get('BPF_FRAMEWORK') != 1
subdir_done()
endif
bpf_clang_flags = [
'-std=gnu11',
'-Wno-compare-distinct-pointer-types',
'-fno-stack-protector',
'-O2',
'-target',
'bpf',
'-g',
'-c',
]
bpf_gcc_flags = [
'-std=gnu11',
'-fno-stack-protector',
'-O2',
'-mkernel=5.2',
'-mcpu=v3',
'-mco-re',
'-gbtf',
'-c',
]
# Generate defines that are appropriate to tell the compiler what architecture
# we're compiling for. By default we just map meson's cpu_family to __<cpu_family>__.
# This dictionary contains the exceptions where this doesn't work.
#
# C.f. https://mesonbuild.com/Reference-tables.html#cpu-families
# and src/basic/missing_syscall_def.h.
cpu_arch_defines = {
'ppc' : ['-D__powerpc__'],
'ppc64' : ['-D__powerpc64__', '-D_CALL_ELF=2'],
'riscv32' : ['-D__riscv', '-D__riscv_xlen=32'],
'riscv64' : ['-D__riscv', '-D__riscv_xlen=64'],
'x86' : ['-D__i386__'],
# For arm, assume hardware fp is available.
'arm' : ['-D__arm__', '-D__ARM_PCS_VFP'],
}
bpf_arch_flags = cpu_arch_defines.get(host_machine.cpu_family(),
['-D__@0@__'.format(host_machine.cpu_family())])
if bpf_compiler == 'gcc'
bpf_arch_flags += ['-m' + host_machine.endian() + '-endian']
endif
libbpf_include_dir = libbpf.get_variable(pkgconfig : 'includedir')
bpf_o_unstripped_cmd = []
if bpf_compiler == 'clang'
bpf_o_unstripped_cmd += [
clang,
bpf_clang_flags,
bpf_arch_flags,
]
elif bpf_compiler == 'gcc'
bpf_o_unstripped_cmd += [
bpf_gcc,
bpf_gcc_flags,
bpf_arch_flags,
]
endif
bpf_o_unstripped_cmd += ['-I.']
if not meson.is_cross_build() and bpf_compiler == 'clang'
target_triplet_cmd = run_command('gcc', '-dumpmachine', check: false)
if target_triplet_cmd.returncode() == 0
target_triplet = target_triplet_cmd.stdout().strip()
bpf_o_unstripped_cmd += [
'-isystem',
'/usr/include/@0@'.format(target_triplet)
]
endif
endif
bpf_o_unstripped_cmd += [
'-idirafter',
libbpf_include_dir,
'@INPUT@',
'-o',
'@OUTPUT@'
]
if bpftool_strip
bpf_o_cmd = [
bpftool,
'gen',
'object',
'@OUTPUT@',
'@INPUT@'
]
elif bpf_compiler == 'clang'
bpf_o_cmd = [
llvm_strip,
'-g',
'@INPUT@',
'-o',
'@OUTPUT@'
]
endif
skel_h_cmd = [
bpftool,
'gen',
'skeleton',
'@INPUT@'
]
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