FreeBSD man pages : nm (1)
nm(1) GNU Development Tools nm(1)
nm - list symbols from object files.
nm [-a|--debug-syms] [-g|--extern-only] [-B] [-C|--demangle]
[-D|--dynamic] [-s|--print-armap] [-o|--print-file-name]
[-n|--numeric-sort] [-p|--no-sort] [-r|--reverse-sort]
[--size-sort] [-u|--undefined-only] [-l|--line-numbers] [--help]
[--version] [-t radix|--radix=radix] [-P|--portability] [-f
format|--format=format] [--target=bfdname] [objfile...]
GNU nm lists the symbols from object files objfile. If no object files
are given as arguments, nm assumes `a.out'.
The long and short forms of options, shown here as alternatives, are
Precede each symbol by the name of the input file where it was
found, rather than identifying the input file once only before
all of its symbols.
Display debugger-only symbols; normally these are not listed.
-B 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.
Display the dynamic symbols rather than the normal symbols.
This is only meaningful for dynamic objects, such as certain
types of shared libraries.
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.
Sort symbols numerically by their addresses, not alphabetically
by their names.
Don't bother to sort the symbols in any order; just print them
in the order encountered.
Use the POSIX.2 standard output format instead of the default
format. Equivalent to ``-f posix''.
When listing symbols from archive members, include the index: a
mapping (stored in the archive by ar or ranlib) of what modules
contain definitions for what names.
Reverse the sense 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. The size of the symbol is printed,
rather than the value.
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. See objdump(1), for information on listing available
Display only undefined symbols (those external to each object
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 sym-
bol, 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.
Show the version number of nm and exit.
--help Show a summary of the options to nm and exit.
`binutils' entry in info; The GNU Binary Utilities, Roland H. Pesch
(October 1991); ar(1), objdump(1), ranlib(1).
Copyright (c) 1991, 2000 Free Software Foundation, Inc.
This document is distributed under the terms of the GNU Free Documenta-
tion License, version 1.1. That license is described in the sources
for this manual page, but it is not displayed here in order to make
this manual more consise. Copies of this license can also be obtained
Free Software Foundation 5 November 1991 nm(1)