ldd(1) [netbsd man page]

LDD(1)							    BSD General Commands Manual 						    LDD(1)

NAME

     ldd -- list dynamic object dependencies

SYNOPSIS

     ldd [-o] [-f format] program ...

DESCRIPTION

     ldd displays all shared objects that are needed to run the given program.	Contrary to nm(1), the list includes ``indirect'' dependencies
     that are the result of needed shared objects which themselves depend on yet other shared objects.	Zero, one or two -f options may be given.
     The argument is a format string passed to rtld(1) and allows customization of ldd's output.  The first format argument is used for library
     objects and defaults to "	-l%o.%m => %p
".  The second format argument is used for non-library objects and defaults to "	%o => %p
".

     These arguments are interpreted as format strings a la printf(3) to customize the trace output and allow ldd to be operated as a filter more
     conveniently.  The following conversions can be used:

     %a    The main program's name (also known as ``__progname'').

     %A    The value of the environment variable LD_TRACE_LOADED_OBJECTS_PROGNAME in a.out and the program name from the argument vector from elf.

     %o    The library name.

     %m    The library's major version number.

     %n    The library's minor version number (a.out only, ignored in elf).

     %p    The full pathname as determined by rtld's library search rules.

     %x    The library's load address

     Additionally, 
 and 	 are recognized and have their usual meaning.

     The -o option is an alias for -f %a:-l%o.%m => %p
, which makes ldd behave analogously to nm -o.

SEE ALSO

     ld(1), ld.elf_so(1), nm(1), rtld(1)

HISTORY

     A ldd utility first appeared in SunOS 4.0, it appeared in its current form in NetBSD 0.9A.

BUGS

     The a.out ldd actually runs the program it has been requested to analyze which in specially constructed environments can have security impli-
     cations.

BSD
								 September 7, 2009							       BSD

LDD(1)							     Linux Programmer's Manual							    LDD(1)

NAME

       ldd - print shared library dependencies

SYNOPSIS

       ldd [OPTION]... FILE...

DESCRIPTION

       ldd prints the shared libraries required by each program or shared library specified on the command line.

OPTIONS

       --version
	      Print the version number of ldd.

       -v --verbose
	      Print all information, including, for example, symbol versioning information.

       -u --unused
	      Print unused direct dependencies.  (Since glibc 2.3.4.)

       -d --data-relocs
	      Perform relocations and report any missing objects (ELF only).

       -r --function-relocs
	      Perform relocations for both data objects and functions, and report any missing objects or functions (ELF only).

       --help Usage information.

NOTES

       The  standard version of ldd comes with glibc2.	Libc5 came with an older version, still present on some systems.  The long options are not
       supported by the libc5 version.	On the other hand, the glibc2 version does not support -V and only has the equivalent --version.

       The libc5 version of this program will use the name of a library given on the command line as-is when  it  contains  a  '/';  otherwise	it
       searches for the library in the standard locations.  To run it on a shared library in the current directory, prefix the name with "./".

BUGS

       ldd does not work on a.out shared libraries.

       ldd  does  not  work with some extremely old a.out programs which were built before ldd support was added to the compiler releases.  If you
       use ldd on one of these programs, the program will attempt to run with argc = 0 and the results will be unpredictable.

SEE ALSO

       ld.so(8), ldconfig(8)

COLOPHON

       This page is part of release 3.25 of the Linux man-pages project.  A description of the project, and information about reporting bugs,  can
       be found at http://www.kernel.org/doc/man-pages/.

								    2000-10-30								    LDD(1)