llvm-nm(1)

1LLVM-NM(1)                    LLVM Command Guide                    LLVM-NM(1)
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NAME

6       llvm-nm - list LLVM bitcode file's symbol table
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SYNOPSIS

9       llvm-nm [options] [filenames...]
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DESCRIPTION

12       The llvm-nm utility lists the names of symbols from the LLVM bitcode
13       files, or ar archives containing LLVM bitcode files, named on the
14       command line.  Each symbol is listed along with some simple information
15       about its provenance.  If no file name is specified, or - is used as a
16       file name, llvm-nm will process a bitcode file on its standard input
17       stream.
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19       llvm-nm's default output format is the traditional BSD nm output
20       format.  Each such output record consists of an (optional) 8-digit
21       hexadecimal address, followed by a type code character, followed by a
22       name, for each symbol. One record is printed per line; fields are
23       separated by spaces. When the address is omitted, it is replaced by 8
24       spaces.
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26       Type code characters currently supported, and their meanings, are as
27       follows:
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29       U   Named object is referenced but undefined in this bitcode file
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31       C   Common (multiple definitions link together into one def)
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33       W   Weak reference (multiple definitions link together into zero or one
34           definitions)
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36       t   Local function (text) object
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38       T   Global function (text) object
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40       d   Local data object
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42       D   Global data object
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44       ?   Something unrecognizable
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46       Because LLVM bitcode files typically contain objects that are not
47       considered to have addresses until they are linked into an executable
48       image or dynamically compiled "just-in-time", llvm-nm does not print an
49       address for any symbol, even symbols which are defined in the bitcode
50       file.
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OPTIONS

53       -P  Use POSIX.2 output format. Alias for --format=posix.
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55       -B    (default)
56           Use BSD output format. Alias for --format=bsd.
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58       -help
59           Print a summary of command-line options and their meanings.
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61       --defined-only
62           Print only symbols defined in this bitcode file (as opposed to
63           symbols which may be referenced by objects in this file, but not
64           defined in this file.)
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66       --extern-only, -g
67           Print only symbols whose definitions are external; that is,
68           accessible from other bitcode files.
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70       --undefined-only, -u
71           Print only symbols referenced but not defined in this bitcode file.
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73       --format=fmt, -f
74           Select an output format; fmt may be sysv, posix, or bsd. The
75           default is bsd.
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BUGS

78       llvm-nm cannot demangle C++ mangled names, like GNU nm can.
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EXIT STATUS

81       llvm-nm exits with an exit code of zero.
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AUTHOR

87       Maintained by the LLVM Team (<http://llvm.org>).
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91CVS                               2010-05-07                        LLVM-NM(1)