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#!/usr/bin/env python3
# PYTHON_ARGCOMPLETE_OKAY
# -
# SPDX-License-Identifier: BSD-2-Clause-FreeBSD
#
# Copyright (c) 2018 Alex Richardson <arichardson@FreeBSD.org>
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#
# $FreeBSD$
#
# This script makes it easier to build on non-FreeBSD systems by bootstrapping
# bmake and inferring required compiler variables.
#
# On FreeBSD you can use it the same way as just calling make:
# `MAKEOBJDIRPREFIX=~/obj ./tools/build/make.py buildworld -DWITH_FOO`
#
# On Linux and MacOS you will either need to set XCC/XCXX/XLD/XCPP or pass
# --cross-bindir to specify the path to the cross-compiler bindir:
# `MAKEOBJDIRPREFIX=~/obj ./tools/build/make.py
# --cross-bindir=/path/to/cross/compiler buildworld -DWITH_FOO TARGET=foo
# TARGET_ARCH=bar`
import argparse
import os
import shlex
import shutil
import subprocess
import sys
from pathlib import Path
def run(cmd, **kwargs):
cmd = list(map(str, cmd)) # convert all Path objects to str
debug("Running", cmd)
subprocess.check_call(cmd, **kwargs)
def bootstrap_bmake(source_root, objdir_prefix):
bmake_source_dir = source_root / "contrib/bmake"
bmake_build_dir = objdir_prefix / "bmake-build"
bmake_install_dir = objdir_prefix / "bmake-install"
bmake_binary = bmake_install_dir / "bin/bmake"
if (bmake_install_dir / "bin/bmake").exists():
return bmake_binary
print("Bootstrapping bmake...")
# TODO: check if the host system bmake is new enough and use that instead
if not bmake_build_dir.exists():
os.makedirs(str(bmake_build_dir))
env = os.environ.copy()
global new_env_vars
env.update(new_env_vars)
if sys.platform.startswith("linux"):
# Work around the deleted file bmake/missing/sys/cdefs.h
# TODO: bmake should keep the compat sys/cdefs.h
env["CFLAGS"] = "-I{src}/tools/build/cross-build/include/common " \
"-I{src}/tools/build/cross-build/include/linux " \
"-D_GNU_SOURCE=1".format(src=source_root)
configure_args = [
"--with-default-sys-path=" + str(bmake_install_dir / "share/mk"),
"--with-machine=amd64", # TODO? "--with-machine-arch=amd64",
"--without-filemon", "--prefix=" + str(bmake_install_dir)]
run(["sh", bmake_source_dir / "boot-strap"] + configure_args,
cwd=str(bmake_build_dir), env=env)
run(["sh", bmake_source_dir / "boot-strap", "op=install"] + configure_args,
cwd=str(bmake_build_dir))
print("Finished bootstrapping bmake...")
return bmake_binary
def debug(*args, **kwargs):
global parsed_args
if parsed_args.debug:
print(*args, **kwargs)
def is_make_var_set(var):
return any(
x.startswith(var + "=") or x == ("-D" + var) for x in sys.argv[1:])
def check_required_make_env_var(varname, binary_name, bindir):
global new_env_vars
if os.getenv(varname):
return
if not bindir:
sys.exit("Could not infer value for $" + varname + ". Either set $" +
varname + " or pass --cross-bindir=/cross/compiler/dir/bin")
# try to infer the path to the tool
guess = os.path.join(bindir, binary_name)
if not os.path.isfile(guess):
sys.exit("Could not infer value for $" + varname + ": " + guess +
" does not exist")
new_env_vars[varname] = guess
debug("Inferred", varname, "as", guess)
global parsed_args
if parsed_args.debug:
run([guess, "--version"])
def check_xtool_make_env_var(varname, binary_name):
# Avoid calling brew --prefix on macOS if all variables are already set:
if os.getenv(varname):
return
global parsed_args
if parsed_args.cross_bindir is None:
parsed_args.cross_bindir = default_cross_toolchain()
return check_required_make_env_var(varname, binary_name,
parsed_args.cross_bindir)
def default_cross_toolchain():
# default to homebrew-installed clang on MacOS if available
if sys.platform.startswith("darwin"):
if shutil.which("brew"):
llvm_dir = subprocess.run(["brew", "--prefix", "llvm"],
capture_output=True).stdout.strip()
debug("Inferred LLVM dir as", llvm_dir)
try:
if llvm_dir and Path(llvm_dir.decode("utf-8"), "bin").exists():
return str(Path(llvm_dir.decode("utf-8"), "bin"))
except OSError:
return None
return None
if __name__ == "__main__":
parser = argparse.ArgumentParser(
formatter_class=argparse.ArgumentDefaultsHelpFormatter)
parser.add_argument("--host-bindir",
help="Directory to look for cc/c++/cpp/ld to build "
"host (" + sys.platform + ") binaries",
default="/usr/bin")
parser.add_argument("--cross-bindir", default=None,
help="Directory to look for cc/c++/cpp/ld to build "
"target binaries (only needed if XCC/XCPP/XLD "
"are not set)")
parser.add_argument("--cross-compiler-type", choices=("clang", "gcc"),
default="clang",
help="Compiler type to find in --cross-bindir (only "
"needed if XCC/XCPP/XLD are not set)"
"Note: using CC is currently highly experimental")
parser.add_argument("--host-compiler-type", choices=("cc", "clang", "gcc"),
default="cc",
help="Compiler type to find in --host-bindir (only "
"needed if CC/CPP/CXX are not set). ")
parser.add_argument("--debug", action="store_true",
help="Print information on inferred env vars")
parser.add_argument("--bootstrap-toolchain", action="store_true",
help="Bootstrap the toolchain instead of using an "
"external one (experimental and not recommended)")
parser.add_argument("--clean", action="store_true",
help="Do a clean rebuild instead of building with "
"-DWITHOUT_CLEAN")
parser.add_argument("--no-clean", action="store_false", dest="clean",
help="Do a clean rebuild instead of building with "
"-DWITHOUT_CLEAN")
try:
import argcomplete # bash completion:
argcomplete.autocomplete(parser)
except ImportError:
pass
parsed_args, bmake_args = parser.parse_known_args()
MAKEOBJDIRPREFIX = os.getenv("MAKEOBJDIRPREFIX")
if not MAKEOBJDIRPREFIX:
sys.exit("MAKEOBJDIRPREFIX is not set, cannot continue!")
if not Path(MAKEOBJDIRPREFIX).is_dir():
sys.exit(
"Chosen MAKEOBJDIRPREFIX=" + MAKEOBJDIRPREFIX + " doesn't exit!")
objdir_prefix = Path(MAKEOBJDIRPREFIX).absolute()
source_root = Path(__file__).absolute().parent.parent.parent
new_env_vars = {}
if not sys.platform.startswith("freebsd"):
if not is_make_var_set("TARGET") or not is_make_var_set("TARGET_ARCH"):
if "universe" not in sys.argv and "tinderbox" not in sys.argv:
sys.exit("TARGET= and TARGET_ARCH= must be set explicitly "
"when building on non-FreeBSD")
if not parsed_args.bootstrap_toolchain:
# infer values for CC/CXX/CPP
if parsed_args.host_compiler_type == "gcc":
default_cc, default_cxx, default_cpp = ("gcc", "g++", "cpp")
# FIXME: this should take values like `clang-9` and then look for
# clang-cpp-9, etc. Would alleviate the need to set the bindir on
# ubuntu/debian at least.
elif parsed_args.host_compiler_type == "clang":
default_cc, default_cxx, default_cpp = (
"clang", "clang++", "clang-cpp")
else:
default_cc, default_cxx, default_cpp = ("cc", "c++", "cpp")
check_required_make_env_var("CC", default_cc, parsed_args.host_bindir)
check_required_make_env_var("CXX", default_cxx,
parsed_args.host_bindir)
check_required_make_env_var("CPP", default_cpp,
parsed_args.host_bindir)
# Using the default value for LD is fine (but not for XLD!)
# On non-FreeBSD we need to explicitly pass XCC/XLD/X_COMPILER_TYPE
use_cross_gcc = parsed_args.cross_compiler_type == "gcc"
check_xtool_make_env_var("XCC", "gcc" if use_cross_gcc else "clang")
check_xtool_make_env_var("XCXX", "g++" if use_cross_gcc else "clang++")
check_xtool_make_env_var("XCPP",
"cpp" if use_cross_gcc else "clang-cpp")
check_xtool_make_env_var("XLD", "ld" if use_cross_gcc else "ld.lld")
# We also need to set STRIPBIN if there is no working strip binary
# in $PATH.
if not shutil.which("strip"):
if sys.platform.startswith("darwin"):
# On macOS systems we have to use /usr/bin/strip.
sys.exit("Cannot find required tool 'strip'. Please install "
"the host compiler and command line tools.")
if parsed_args.host_compiler_type == "clang":
strip_binary = "llvm-strip"
else:
strip_binary = "strip"
check_required_make_env_var("STRIPBIN", strip_binary,
parsed_args.host_bindir)
if os.getenv("STRIPBIN") or "STRIPBIN" in new_env_vars:
# If we are setting STRIPBIN, we have to set XSTRIPBIN to the
# default if it is not set otherwise already.
if not os.getenv("XSTRIPBIN") and not is_make_var_set("XSTRIPBIN"):
# Use the bootstrapped elftoolchain strip:
new_env_vars["XSTRIPBIN"] = "strip"
bmake_binary = bootstrap_bmake(source_root, objdir_prefix)
# at -j1 cleandir+obj is unbearably slow. AUTO_OBJ helps a lot
debug("Adding -DWITH_AUTO_OBJ")
bmake_args.append("-DWITH_AUTO_OBJ")
if parsed_args.clean is False:
bmake_args.append("-DWITHOUT_CLEAN")
if (parsed_args.clean is None and not is_make_var_set("NO_CLEAN")
and not is_make_var_set("WITHOUT_CLEAN")):
# Avoid accidentally deleting all of the build tree and wasting lots of
# time cleaning directories instead of just doing a rm -rf ${.OBJDIR}
want_clean = input("You did not set -DWITHOUT_CLEAN/--clean/--no-clean."
" Did you really mean to do a clean build? y/[N] ")
if not want_clean.lower().startswith("y"):
bmake_args.append("-DWITHOUT_CLEAN")
env_cmd_str = " ".join(
shlex.quote(k + "=" + v) for k, v in new_env_vars.items())
make_cmd_str = " ".join(
shlex.quote(s) for s in [str(bmake_binary)] + bmake_args)
debug("Running `env ", env_cmd_str, " ", make_cmd_str, "`", sep="")
os.environ.update(new_env_vars)
os.chdir(str(source_root))
os.execv(str(bmake_binary), [str(bmake_binary)] + bmake_args)