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96069f42a9
Linking to this library will make DDNet compatible with all distros that ship libcurl.so.4 with arbitrary version data attached. Distros sometimes add versioning information to the symbols exported by curl that artificially (because they're compatible with each other) limit where our releases can be executed if dynamically linked. This should reduce release size a bit and let's us take advantage of automatically updated libraries.
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 dir, _, 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(dir, filename)) 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(".type {},@function".format(name))
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for name in names:
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result.append(".global {}".format(name))
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for name in names:
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result.append("{}:".format(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="Output filename (default: {})".format(DEFAULT_OUTPUT), default=DEFAULT_OUTPUT)
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p.add_argument("--soname", help="soname of the produced shared object (default: {})".format(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("using {} as temporary file".format(f.name))
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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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"-Wl,-soname,{}".format(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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