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77 lines
3.3 KiB
Python
77 lines
3.3 KiB
Python
#!/usr/bin/python3
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# Print a list of symbols exported by some headers that would
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# otherwise be in the user's namespace.
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# Copyright (C) 2018-2025 Free Software Foundation, Inc.
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# This file is part of the GNU C Library.
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#
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# The GNU C Library is free software; you can redistribute it and/or
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# modify it under the terms of the GNU Lesser General Public
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# License as published by the Free Software Foundation; either
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# version 2.1 of the License, or (at your option) any later version.
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#
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# The GNU C Library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public
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# License along with the GNU C Library; if not, see
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# <https://www.gnu.org/licenses/>.
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import argparse
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import glibcconform
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# Extra symbols possibly not found through -aux-info but still
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# reserved by the standard: either data symbols, or symbols where the
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# standard leaves unspecified whether the identifier is a macro or
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# defined with external linkage.
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EXTRA_SYMS = {}
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EXTRA_SYMS['ISO'] = {'errno', 'setjmp', 'va_end'}
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EXTRA_SYMS['ISO99'] = EXTRA_SYMS['ISO'] | {'math_errhandling'}
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# stdatomic.h not yet covered by conformance tests; as per DR#419, all
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# the generic functions there or may not be defined with external
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# linkage (but are reserved in any case).
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EXTRA_SYMS['ISO11'] = EXTRA_SYMS['ISO99']
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# The following lists may not be exhaustive.
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EXTRA_SYMS['POSIX'] = (EXTRA_SYMS['ISO']
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| {'environ', 'sigsetjmp', 'optarg', 'optind', 'opterr',
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'optopt', 'tzname'})
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EXTRA_SYMS['XPG4'] = (EXTRA_SYMS['POSIX']
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| {'signgam', 'loc1', 'loc2', 'locs', 'daylight',
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'timezone'})
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EXTRA_SYMS['XPG42'] = EXTRA_SYMS['XPG4'] | {'getdate_err', 'h_errno'}
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EXTRA_SYMS['UNIX98'] = EXTRA_SYMS['XPG42']
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EXTRA_SYMS['XOPEN2K'] = (EXTRA_SYMS['POSIX']
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| {'signgam', 'daylight', 'timezone', 'getdate_err',
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'h_errno', 'in6addr_any', 'in6addr_loopback'})
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EXTRA_SYMS['POSIX2008'] = (EXTRA_SYMS['POSIX']
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| {'in6addr_any', 'in6addr_loopback'})
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EXTRA_SYMS['XOPEN2K8'] = (EXTRA_SYMS['POSIX2008']
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| {'signgam', 'daylight', 'timezone', 'getdate_err'})
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def main():
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"""The main entry point."""
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parser = argparse.ArgumentParser(description='List exported symbols.')
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parser.add_argument('--headers', metavar='HEADERS',
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help='list of headers')
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parser.add_argument('--standard', metavar='STD',
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help='standard to use when processing headers')
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parser.add_argument('--cc', metavar='CC',
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help='C compiler to use')
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parser.add_argument('--flags', metavar='CFLAGS',
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help='Compiler flags to use with CC')
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args = parser.parse_args()
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fns = set()
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compiler = '%s %s' % (args.cc, args.flags)
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for header in args.headers.split():
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fns |= glibcconform.list_exported_functions(compiler, args.standard,
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header)
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fns |= EXTRA_SYMS[args.standard]
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print('\n'.join(sorted(fn for fn in fns if not fn.startswith('_'))))
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if __name__ == '__main__':
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main()
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