(binutils.info.gz) nm

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 2 nm
      nm [`-a'|`--debug-syms'] [`-g'|`--extern-only']
         [`-B'] [`-C'|`--demangle'[=STYLE]] [`-D'|`--dynamic']
         [`-S'|`--print-size'] [`-s'|`--print-armap']
         [`-n'|`-v'|`--numeric-sort'] [`-p'|`--no-sort']
         [`-r'|`--reverse-sort'] [`--size-sort'] [`-u'|`--undefined-only']
         [`-t' RADIX|`--radix='RADIX] [`-P'|`--portability']
         [`--target='BFDNAME] [`-f'FORMAT|`--format='FORMAT]
         [`--defined-only'] [`-l'|`--line-numbers'] [`--no-demangle']
         [`-V'|`--version'] [`-X 32_64'] [`--help']  [OBJFILE...]
    GNU `nm' lists the symbols from object files OBJFILE....  If no
 object files are listed as arguments, `nm' assumes the file `a.out'.
    For each symbol, `nm' shows:
    * The symbol value, in the radix selected by options (see below), or
      hexadecimal by default.
    * The symbol type.  At least the following types are used; others
      are, as well, depending on the object file format.  If lowercase,
      the symbol is local; if uppercase, the symbol is global (external).
           The symbol's value is absolute, and will not be changed by
           further linking.
           The symbol is in the uninitialized data section (known as
           The symbol is common.  Common symbols are uninitialized data.
           When linking, multiple common symbols may appear with the
           same name.  If the symbol is defined anywhere, the common
           symbols are treated as undefined references.  For more
           details on common symbols, see the discussion of -warn-common
           in  Linker options (ld.info)Options.
           The symbol is in the initialized data section.
           The symbol is in an initialized data section for small
           objects.  Some object file formats permit more efficient
           access to small data objects, such as a global int variable
           as opposed to a large global array.
           The symbol is an indirect reference to another symbol.  This
           is a GNU extension to the a.out object file format which is
           rarely used.
           The symbol is a debugging symbol.
           The symbol is in a read only data section.
           The symbol is in an uninitialized data section for small
           The symbol is in the text (code) section.
           The symbol is undefined.
           The symbol is a weak object.  When a weak defined symbol is
           linked with a normal defined symbol, the normal defined
           symbol is used with no error.  When a weak undefined symbol
           is linked and the symbol is not defined, the value of the
           weak symbol becomes zero with no error.
           The symbol is a weak symbol that has not been specifically
           tagged as a weak object symbol.  When a weak defined symbol
           is linked with a normal defined symbol, the normal defined
           symbol is used with no error.  When a weak undefined symbol
           is linked and the symbol is not defined, the value of the
           symbol is determined in a system-specific manner without
           error.  On some systems, uppercase indicates that a default
           value has been specified.
           The symbol is a stabs symbol in an a.out object file.  In
           this case, the next values printed are the stabs other field,
           the stabs desc field, and the stab type.  Stabs symbols are
           used to hold debugging information.  For more information,
           see  Stabs (stabs.info)Top.
           The symbol type is unknown, or object file format specific.
    * The symbol name.
    The long and short forms of options, shown here as alternatives, are
      Precede each symbol by the name of the input file (or archive
      member) in which it was found, rather than identifying the input
      file once only, before all of its symbols.
      Display all symbols, even debugger-only symbols; normally these
      are not listed.
      The same as `--format=bsd' (for compatibility with the MIPS `nm').
      Decode ("demangle") low-level symbol names into user-level names.
      Besides removing any initial underscore prepended by the system,
      this makes C++ function names readable. Different compilers have
      different mangling styles. The optional demangling style argument
      can be used to choose an appropriate demangling style for your
      compiler.  c++filt, for more information on demangling.
      Do not demangle low-level symbol names.  This is the default.
      Display the dynamic symbols rather than the normal symbols.  This
      is only meaningful for dynamic objects, such as certain types of
      shared libraries.
 `-f FORMAT'
      Use the output format FORMAT, which can be `bsd', `sysv', or
      `posix'.  The default is `bsd'.  Only the first character of
      FORMAT is significant; it can be either upper or lower case.
      Display only external symbols.
      For each symbol, use debugging information to try to find a
      filename and line number.  For a defined symbol, look for the line
      number of the address of the symbol.  For an undefined symbol,
      look for the line number of a relocation entry which refers to the
      symbol.  If line number information can be found, print it after
      the other symbol information.
      Sort symbols numerically by their addresses, rather than
      alphabetically by their names.
      Do not bother to sort the symbols in any order; print them in the
      order encountered.
      Use the POSIX.2 standard output format instead of the default
      format.  Equivalent to `-f posix'.
      Print size, not the value, of defined symbols for the `bsd' output
      When listing symbols from archive members, include the index: a
      mapping (stored in the archive by `ar' or `ranlib') of which
      modules contain definitions for which names.
      Reverse the order of the sort (whether numeric or alphabetic); let
      the last come first.
      Sort symbols by size.  The size is computed as the difference
      between the value of the symbol and the value of the symbol with
      the next higher value.  If the `bsd' output format is used the
      size of the symbol is printed, rather than the value, and `-S'
      must be used in order both size and value to be printed.
      Display symbols which have a target-specific special meaning.
      These symbols are usually used by the target for some special
      processing and are not normally helpful when included included in
      the normal symbol lists.  For example for ARM targets this option
      would skip the mapping symbols used to mark transitions between
      ARM code, THUMB code and data.
 `-t RADIX'
      Use RADIX as the radix for printing the symbol values.  It must be
      `d' for decimal, `o' for octal, or `x' for hexadecimal.
      Specify an object code format other than your system's default
      format.   Target Selection, for more information.
      Display only undefined symbols (those external to each object
      Display only defined symbols for each object file.
      Show the version number of `nm' and exit.
      This option is ignored for compatibility with the AIX version of
      `nm'.  It takes one parameter which must be the string `32_64'.
      The default mode of AIX `nm' corresponds to `-X 32', which is not
      supported by GNU `nm'.
      Show a summary of the options to `nm' and exit.
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