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#!/usr/bin/env/python3
# Copyright 2022 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
# Enumerate all clang libraries and generate a .rs file which is built into a
# library that links all the clanglibs into it. Depending on that library
# ensures linking against our clang libraries.
# See BUILD.gn in this directory for more context.
import argparse
import os
import stat
import sys
import shutil
import subprocess
import re
LIB_BASENAME_RE = re.compile(r"lib(.*)\.(?:lib|a)$", re.I)
def main():
parser = argparse.ArgumentParser("find_clanglibs.py")
parser.add_argument("--output", help="Path to rsp file", required=True)
parser.add_argument("--depfile", help="Path to write depfile", required=True)
parser.add_argument("--clang-libs-dir",
help="Where to find clang and LLVM libs",
required=True)
args = parser.parse_args()
if not os.path.exists(os.path.join(
args.clang_libs_dir, "libclang.a")) and not os.path.exists(
os.path.join(args.clang_libs_dir, "libclang.lib")):
print("Couldn't find libclang.a|lib. Please ensure you set a custom var in "
"your .gclient file like so:\n"
" \"custom_vars\": { \"checkout_clang_libs\": True, }\n"
"Then run gclient sync; rm "
"<out dir>/obj/build/rust/clanglibs/clang_libs.rsp.")
return -1
with open(args.depfile, 'w') as depfile:
depfile.write("%s:" % args.output)
with open(args.output, 'w') as output:
output.write("//! Generated by build/rust/clanglibs/find_clanglibs.py\n")
output.write("//! @generated\n")
for f in os.listdir(args.clang_libs_dir):
m = LIB_BASENAME_RE.match(f)
if m:
basename = m.group(1)
output.write("#[link(name=\"{}\")]\n".format(basename))
full_path = os.path.join(args.clang_libs_dir, f)
depfile.write(" {}\n".format(full_path))
output.write("#[link(name=\"stdc++\")]\n")
output.write("#[link(name=\"z\")]\n")
output.write("extern {}\n")
if __name__ == '__main__':
sys.exit(main())
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