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75 lines
2.2 KiB
Python
75 lines
2.2 KiB
Python
#!/usr/bin/env python3
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import argparse
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import os
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import re
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import subprocess
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import tempfile
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os.chdir(os.path.dirname(__file__) + "/..")
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PATH = "src/"
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CURL_RE=re.compile(r"\bcurl_\w*")
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def get_curl_calls(path):
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names = set()
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for directory, _, files in os.walk(path):
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for filename in files:
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if (filename.endswith(".cpp") or
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filename.endswith(".c") or
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filename.endswith(".h")):
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with open(os.path.join(directory, filename), encoding="utf-8") as f:
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contents = f.read()
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names = names.union(CURL_RE.findall(contents))
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return names
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def assembly_source(names):
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names = sorted(names)
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result = []
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for name in names:
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result.append(f".type {name},@function")
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for name in names:
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result.append(f".global {name}")
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for name in names:
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result.append(f"{name}:")
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return "\n".join(result + [""])
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DEFAULT_OUTPUT="libcurl.so"
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DEFAULT_SONAME="libcurl.so.4"
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def main():
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p = argparse.ArgumentParser(description="Create a stub shared object for linking")
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p.add_argument("-k", "--keep", action="store_true", help="Keep the intermediary assembly file")
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p.add_argument("--output", help=f"Output filename (default: {DEFAULT_OUTPUT})", default=DEFAULT_OUTPUT)
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p.add_argument("--soname", help=f"soname of the produced shared object (default: {DEFAULT_SONAME})", default=DEFAULT_SONAME)
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p.add_argument("--functions", metavar="FUNCTION", nargs="+", help="Function symbols that should be put into the shared object (default: look for curl_* names in the source code)")
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p.add_argument("--link-args", help="Colon-separated list of additional linking arguments")
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args = p.parse_args()
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if args.functions is not None:
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functions = args.functions
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else:
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functions = get_curl_calls(PATH)
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extra_link_args = []
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if args.link_args:
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extra_link_args = args.link_args.split(":")
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with tempfile.NamedTemporaryFile("w", suffix=".s", delete=not args.keep) as f:
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if args.keep:
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print(f"using {f.name} as temporary file")
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f.write(assembly_source(functions))
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f.flush()
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subprocess.check_call([
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"cc",
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] + extra_link_args + [
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"-shared",
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"-nostdlib", # don't need to link to libc
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f"-Wl,-soname,{args.soname}",
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"-o", args.output,
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f.name,
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])
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subprocess.check_call(["strip", args.output])
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if __name__ == '__main__':
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main()
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