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#!/usr/bin/env python
"""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 = (['FOO {\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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