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#!/usr/bin/env python3
"""Converts a .exports file to a format consumable by linkers.
An .exports file is a file with one exported symbol per line.
This script converts a .exports file into a format that linkers
can understand:
- It prepends a `_` to each line for use with -exported_symbols_list for Darwin
- It writes a .def file for use with /DEF: for Windows
- It writes a linker script for use with --version-script elsewhere
"""
import argparse
import sys
def main():
parser = argparse.ArgumentParser(description=__doc__)
parser.add_argument("--format", required=True, choices=("linux", "mac", "win"))
parser.add_argument("source")
parser.add_argument("output")
args = parser.parse_args()
symbols = open(args.source).readlines()
if args.format == "linux":
output_lines = (
[
"LLVM_0 {\n",
" global:\n",
]
+ [" %s;\n" % s.rstrip() for s in symbols]
+ [" local:\n", " *;\n", "};\n"]
)
elif args.format == "mac":
output_lines = ["_" + s for s in symbols]
else:
assert args.format == "win"
output_lines = ["EXPORTS\n"] + [" " + s for s in symbols]
open(args.output, "w").writelines(output_lines)
if __name__ == "__main__":
sys.exit(main())
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