build_libbpf

#!/usr/bin/env python3
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
""" This programs builds a libbpf static library and places it in the runtime
    folder. The library and its headers are required by the kernel target.
"""

import sys
import logging
from pathlib import Path

FILE_DIR = Path(__file__).resolve().parent
# Append tools to the import path.
sys.path.append(str(FILE_DIR.joinpath("../../tools")))
import testutils


def main() -> int:
    # Configure logging.
    logging.basicConfig(
        format="%(levelname)s:%(message)s",
        level=logging.WARN,
        filemode="w",
    )
    libbpf_dir = FILE_DIR.joinpath("runtime/contrib/libbpf")
    libbpf_src_dir = libbpf_dir.joinpath("src")
    libbpf_build_dir = libbpf_src_dir.joinpath("build")
    libbpf_target_dir = FILE_DIR.joinpath("runtime")
    # Create the libbpf build directory
    testutils.check_and_create_dir(libbpf_build_dir)
    # Build libbpf
    mk_cmd = f"make -C {libbpf_src_dir} install "
    mk_cmd += "BUILD_STATIC_ONLY=y "
    mk_cmd += f"OBJDIR={libbpf_build_dir} "
    mk_cmd += f"DESTDIR={libbpf_target_dir} "
    mk_cmd += "EXTRA_CFLAGS=-fPIE"
    result = testutils.exec_process(args=mk_cmd)
    if result.returncode != testutils.SUCCESS:
        testutils.log.error("Could not build libbpf")
    return result.returncode


if __name__ == "__main__":
    sys.exit(main())