def main():
root_folder = pathlib.Path(__file__).resolve().parent
args = parse_parameters(root_folder)
build_folder = pathlib.Path(args.build_folder)
if not build_folder.is_absolute():
build_folder = root_folder.joinpath(build_folder)
install_folder = pathlib.Path(args.install_folder)
if not install_folder.is_absolute():
install_folder = root_folder.joinpath(install_folder)
targets = ["all"]
if args.targets is not None:
targets = args.targets
utils.download_binutils(root_folder)
build_targets(build_folder, install_folder, root_folder,
create_targets(targets), args.march)
def fetch_llvm_binutils(root_folder, update, shallow, ref):
"""
Download llvm and binutils or update them if they exist
:param root_folder: Working directory
:param update: Boolean indicating whether sources need to be updated or not
:param ref: The ref to checkout the monorepo to
"""
p = root_folder.joinpath("llvm-project")
cwd = p.as_posix()
if p.is_dir():
if update:
utils.print_header("Updating LLVM")
# Make sure repo is up to date before trying to see if checkout is possible
subprocess.run(["git", "fetch", "origin"], check=True, cwd=cwd)
# Explain to the user how to avoid issues if their ref does not exist with
# a shallow clone.
if repo_is_shallow(p) and not ref_exists(p, ref):
utils.print_error(
"\nSupplied ref (%s) does not exist, cannot checkout." %
ref)
utils.print_error("To proceed, either:")
utils.print_error(
"\t1. Manage the repo yourself and pass '--no-update' to the script."
)
utils.print_error(
"\t2. Run 'git -C %s fetch --unshallow origin' to get a complete repository."
% cwd)
utils.print_error(
"\t3. Delete '%s' and re-run the script with '-s' + '-b <ref>' to get a full set of refs."
% cwd)
exit(1)
# Do the update
subprocess.run(["git", "checkout", ref], check=True, cwd=cwd)
local_ref = None
try:
local_ref = subprocess.check_output(
["git", "symbolic-ref", "-q", "HEAD"],
cwd=cwd).decode("utf-8")
except subprocess.CalledProcessError:
# This is thrown when we're on a revision that cannot be mapped to a symbolic reference, like a tag
# or a git hash. Swallow and move on with the rest of our business.
pass
if local_ref and local_ref.startswith("refs/heads/"):
# This is a branch, pull from remote
subprocess.run([
"git", "pull", "--rebase", "origin",
local_ref.strip().replace("refs/heads/", "")
],
check=True,
cwd=cwd)
else:
utils.print_header("Downloading LLVM")
extra_args = ()
if shallow:
extra_args = ("--depth", "1")
if ref != "master":
extra_args += ("--no-single-branch", )
subprocess.run([
"git", "clone", *extra_args,
"https://github.com/llvm/llvm-project",
p.as_posix()
],
check=True)
subprocess.run(["git", "checkout", ref], check=True, cwd=cwd)
# One might wonder why we are downloading binutils in an LLVM build script :)
# We need it for the LLVMgold plugin, which can be used for LTO with ld.gold,
# which at the time of writing this, is how the Google Pixel 3 kernel is built
# and linked.
utils.download_binutils(root_folder)