Linux in a Nutshell, Third Edition

Name

nm

Synopsis

nm [options] [objfiles]

Description

Print the symbol table (name list) in alphabetical order for one or more object files. If no object files are specified, perform operations on a.out. Output includes each symbol’s value, type, size, name, and so on. A key letter categorizing the symbol can also be displayed. If no object file is given, use a.out.

Options

-a, --debug-syms

Print debugger symbols.

-f format

Specify output format (bsd, sysv, or posix). Default is bsd.

-g, --extern-only

Print external symbols only.

-n, -v, --numeric-sort

Sort the external symbols by address.

-p, --no-sort

Don’t sort the symbols at all.

-r, --reverse-sort

Sort in reverse, alphabetically or numerically.

--size-sort

Sort by size.

-u, --undefined-only

Report only the undefined symbols.

-A, -o, -print-file-name

Print input filenames before each symbol.

-C, --demangle

Translate low-level symbol names into readable versions.

-D, --dynamic

Print dynamic, not normal, symbols. Useful only when working with dynamic objects (some kinds of shared libraries, for example).

-P, --portability

Same as -f posix.

-V, --version

Print nm’s version number on standard error.