


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


NAME
       llvm-nm - list LLVM bitcode file's symbol table

SYNOPSIS
       llvm-nm [options] [filenames...]

DESCRIPTION
       The llvm-nm utility lists the names of symbols from the LLVM bitcode
       files, or ar archives containing LLVM bitcode files, named on the
       command line.  Each symbol is listed along with some simple information
       about its provenance.  If no file name is specified, or - is used as a
       file name, llvm-nm will process a bitcode file on its standard input
       stream.

       llvm-nm's default output format is the traditional BSD nm output
       format.  Each such output record consists of an (optional) 8-digit
       hexadecimal address, followed by a type code character, followed by a
       name, for each symbol. One record is printed per line; fields are
       separated by spaces. When the address is omitted, it is replaced by 8
       spaces.

       Type code characters currently supported, and their meanings, are as
       follows:

       U   Named object is referenced but undefined in this bitcode file

       C   Common (multiple definitions link together into one def)

       W   Weak reference (multiple definitions link together into zero or one
           definitions)

       t   Local function (text) object

       T   Global function (text) object

       d   Local data object

       D   Global data object

       ?   Something unrecognizable

       Because LLVM bitcode files typically contain objects that are not
       considered to have addresses until they are linked into an executable
       image or dynamically compiled "just-in-time", llvm-nm does not print an
       address for any symbol, even symbols which are defined in the bitcode
       file.

OPTIONS
       -P  Use POSIX.2 output format. Alias for --format=posix.

       -B    (default)
           Use BSD output format. Alias for --format=bsd.





CVS                         2010-05-06                          1





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


       -help
           Print a summary of command-line options and their meanings.

       --defined-only
           Print only symbols defined in this bitcode file (as opposed to
           symbols which may be referenced by objects in this file, but not
           defined in this file.)

       --extern-only, -g
           Print only symbols whose definitions are external; that is,
           accessible from other bitcode files.

       --undefined-only, -u
           Print only symbols referenced but not defined in this bitcode file.

       --format=fmt, -f
           Select an output format; fmt may be sysv, posix, or bsd. The
           default is bsd.

BUGS
       llvm-nm cannot demangle C++ mangled names, like GNU nm can.

EXIT STATUS
       llvm-nm exits with an exit code of zero.

SEE ALSO
       llvm-dis, ar(1), nm(1)

AUTHOR
       Maintained by the LLVM Team (<http://llvm.org>).



























CVS                         2010-05-06                          2


