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#!/usr/bin/env python3
#===----------------------------------------------------------------------===##
#
# Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
# See https://llvm.org/LICENSE.txt for license information.
# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
#
#===----------------------------------------------------------------------===##
"""
Generate a linker script that links libc++ to the proper ABI library.
An example script for c++abi would look like "INPUT(libc++.so.1 -lc++abi)".
"""
import argparse
import os
import sys
def main():
parser = argparse.ArgumentParser(description=__doc__)
parser.add_argument("--dryrun", help="Don't write any output",
action="store_true", default=False)
parser.add_argument("--rename", action="store_true", default=False,
help="Rename the output as input so we can replace it")
parser.add_argument("--input", help="Path to libc++ library", required=True)
parser.add_argument("--output", help="Path to libc++ linker script", required=True)
parser.add_argument("libraries", nargs="+",
help="List of libraries libc++ depends on")
args = parser.parse_args()
# Use the relative path for the libc++ library.
libcxx = os.path.relpath(args.input, os.path.dirname(args.output))
# Prepare the list of public libraries to link.
public_libs = ['-l%s' % l for l in args.libraries]
# Generate the linker script contents.
contents = "INPUT(%s)" % ' '.join([libcxx] + public_libs)
print("GENERATING SCRIPT: '%s' as file %s" % (contents, args.output))
if args.dryrun:
return 0
# Remove the existing libc++ symlink if it exists.
if os.path.islink(args.output):
os.unlink(args.output)
# Replace it with the linker script.
with open(args.output, 'w') as f:
f.write(contents + "\n")
return 0
if __name__ == '__main__':
sys.exit(main())
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