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#!/usr/bin/env python3
#
# Copyright (C) 2024 The Android Open Source Project
#
# 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 script is used as a replacement for the Rust linker to allow fine-grained
control over the what gets emitted to the linker.
"""
import os
import shutil
import subprocess
import sys
import argparse
replacementVersionScript = None
argparser = argparse.ArgumentParser()
argparser.add_argument('--android-clang-bin', required=True)
args = argparser.parse_known_args()
old_clang_args = [args[0].android_clang_bin] + args[1]
new_clang_args = list()
# Add/remove args
for i, arg in enumerate(old_clang_args):
# Record and remove the custom android-version-script arg
if arg.startswith('-Wl,--android-version-script='):
replacementVersionScript = arg.split("=")[1]
continue
# Remove object files rustc emits for Windows target
# We provide these as an rlib.
if arg == "rsend.o":
continue
if arg == "rsbegin.o":
continue
# Keep the arg
new_clang_args.append(old_clang_args[i])
# Modify args
if replacementVersionScript:
versionScriptFound = False
for i, arg in enumerate(new_clang_args):
if arg.startswith('-Wl,--version-script='):
new_clang_args[i] ='-Wl,--version-script=' + replacementVersionScript
versionScriptFound = True
break
if not versionScriptFound:
# If rustc did not emit a version script, just append the arg
new_clang_args.append('-Wl,--version-script=' + replacementVersionScript)
try:
subprocess.run(new_clang_args, encoding='utf-8', check=True)
except subprocess.CalledProcessError as e:
sys.exit(-1)
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