2001-01-01 Philip Blundell <philb@gnu.org>

[binutils.git] / binutils / nm.1

.\" Copyright (c) 1991, 2000 Free Software Foundation
.\" See section COPYING for conditions for redistribution
.TH nm 1 "5 November 1991" "Free Software Foundation" "GNU Development Tools"
.de BP
.sp
.ti \-.2i
\(**
..

.SH NAME
nm \- list symbols from object files.

.SH SYNOPSIS
.hy 0
.na
.TP
.B nm
.RB "[\|" \-a | \-\-debug\-syms "\|]" 
.RB "[\|" \-g | \-\-extern\-only "\|]"
.RB "[\|" \-B "\|]"  
.RB "[\|" \-C | \-\-demangle "\|]" 
.RB "[\|" \-D | \-\-dynamic "\|]" 
.RB "[\|" \-s | \-\-print\-armap "\|]" 
.RB "[\|" \-o | \-\-print\-file\-name "\|]"  
.RB "[\|" \-n | \-\-numeric\-sort "\|]" 
.RB "[\|" \-p | \-\-no\-sort "\|]"
.RB "[\|" \-r | \-\-reverse\-sort "\|]" 
.RB "[\|" \-\-size\-sort "\|]" 
.RB "[\|" \-u | \-\-undefined\-only "\|]"  
.RB "[\|" \-l | \-\-line\-numbers "\|]"
.RB "[\|" \-\-help "\|]"  
.RB "[\|" \-\-version "\|]"  
.RB "[\|" "\-t \fIradix" | \-\-radix=\fIradix "\|]"
.RB "[\|" \-P | --portability "\|]"
.RB "[\|" "\-f \fIformat" | \-\-format=\fIformat "\|]"
.RB "[\|" "\-\-target=\fIbfdname" "\|]"
.RB "[\|" \c
.I objfile\c
\&.\|.\|.\|]
.ad b
.hy 1
.SH DESCRIPTION
GNU \c
.B nm\c
\& lists the symbols from object files \c
.I objfile\c
\&.  If no object files are given as arguments, \c
.B nm\c
\& assumes `\|\c
.B a.out\c
\|'.

.SH OPTIONS
The long and short forms of options, shown here as alternatives, are
equivalent.

.TP
.B \-A
.TP
.B \-o
.TP
.B \-\-print\-file\-name 
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. 

.TP
.B \-a
.TP
.B \-\-debug\-syms 
Display debugger-only symbols; normally these are not listed.

.TP
.B \-B
The same as
.B \-\-format=bsd
(for compatibility with the MIPS \fBnm\fP).

.TP
.B \-C
.TP
.B \-\-demangle
Decode (\fIdemangle\fP) low-level symbol names into user-level names.
Besides removing any initial underscore prepended by the system, this
makes C++ function names readable.

.TP
.B \-D
.TP
.B \-\-dynamic
Display the dynamic symbols rather than the normal symbols.  This is
only meaningful for dynamic objects, such as certain types of shared
libraries.

.TP
.B "\-f \fIformat"
Use the output format \fIformat\fP, which can be ``bsd'',
``sysv'', or ``posix''.  The default is ``bsd''.
Only the first character of \fIformat\fP is significant; it can be
either upper or lower case.

.TP
.B \-g
.TP
.B \-\-extern\-only 
Display only external symbols.

.TP
.B \-n
.TP
.B \-v
.TP
.B \-\-numeric\-sort 
Sort symbols numerically by their addresses, not alphabetically by their
names. 

.TP
.B \-p
.TP
.B \-\-no\-sort 
Don't bother to sort the symbols in any order; just print them in the
order encountered.

.TP
.B \-P
.TP
.B \-\-portability
Use the POSIX.2 standard output format instead of the default format.
Equivalent to ``\-f posix''.

.TP
.B \-s
.TP
.B \-\-print\-armap
When listing symbols from archive members, include the index: a mapping
(stored in the archive by \c
.B ar\c
\& or \c
.B ranlib\c
\&) of what modules
contain definitions for what names.

.TP
.B \-r
.TP
.B \-\-reverse\-sort 
Reverse the sense of the sort (whether numeric or alphabetic); let the
last come first.

.TP
.B \-\-size\-sort 
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.

.TP
.B "\-t \fIradix"
.TP
.B "\-\-radix=\fIradix"
Use \fIradix\fP as the radix for printing the symbol values.  It must be
``d'' for decimal, ``o'' for octal, or ``x'' for hexadecimal.

.TP
.BI "\-\-target=" "bfdname"
Specify an object code format other than your system's default format.
See 
.BR objdump ( 1 ),
for information on listing available formats.

.TP
.B \-u
.TP
.B \-\-undefined\-only 
Display only undefined symbols (those external to each object file).

.TP
.B \-l
.TP
.B \-\-line\-numbers
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.

.TP
.B \-V
.TP
.B \-\-version
Show the version number of
.B nm
and exit.

.TP
.B \-\-help
Show a summary of the options to
.B nm
and exit.

.SH "SEE ALSO"
.RB "`\|" binutils "\|'"
entry in 
.B
info\c
\&; 
.I
The GNU Binary Utilities\c
\&, Roland H. Pesch (October 1991);
.BR ar "(" 1 "),"
.BR objdump ( 1 ),
.BR ranlib "(" 1 ")."


.SH COPYING
Copyright (c) 1991, 2000 Free Software Foundation, Inc.
.PP
This document is distributed under the terms of the GNU Free
Documentation 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 from: http://www.gnu.org/copyleft/.

\"  .SH GNU Free Documentation License
\"    Version 1.1, March 2000

\"    Copyright (C) 2000  Free Software Foundation, Inc.
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\"    Everyone is permitted to copy and distribute verbatim
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\"  5. COMBINING DOCUMENTS
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\"  .PP
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\"  in the various original documents, forming one section entitled
\"  "History"; likewise combine any sections entitled "Acknowledgements",
\"  and any sections entitled "Dedications".  You must delete all sections
\"  entitled "Endorsements."
\"  .PP

\"  6. COLLECTIONS OF DOCUMENTS
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\"  You may make a collection consisting of the Document and other documents
\"  released under this License, and replace the individual copies of this
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\"  7. AGGREGATION WITH INDEPENDENT WORKS
\"  .PP
\"  A compilation of the Document or its derivatives with other separate
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\"  8. TRANSLATION
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\"  .PP

\"  9. TERMINATION
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\"  You may not copy, modify, sublicense, or distribute the Document except
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\"  10. FUTURE REVISIONS OF THIS LICENSE
\"  .PP
\"  The Free Software Foundation may publish new, revised versions
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\"  ADDENDUM: How to use this License for your documents
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\"  To use this License in a document you have written, include a copy of
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