ldd(1) - NetBSD Manual Pages

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LDD(1)                  NetBSD General Commands Manual                  LDD(1)


NAME

     ldd -- list dynamic object dependencies


SYNOPSIS

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


DESCRIPTION

     ldd displays all shared objects that are needed to run the given program.
     Unlike 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 that allows customization of ldd's output.  The first format argu-
     ment is used for library objects and defaults to `\t-l%o.%m => %p\n'.
     The second format argument is used for non-library objects and defaults
     to `\t%o => %p\n'.

     These arguments are interpreted as format strings a la printf(3) to cus-
     tomize 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 absolute path, constructed either from
                   the exact argument passed to ldd if it is an absolute path,
                   or having the current working directory prepended to it if
                   not.

           %A      The program name from the argument vector.

           %o      The library name.

           %m      The library's major version number.

           %n      Obsolete (a.out).  The library's minor version number,
                   expands to an empty string in ELF.

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

           %x      The library's load address

     Additionally, `\n' and `\t' are recognized and have their usual meaning.

     The -o option is a shorthand to set the format for library objects to
     `%a:-l%o.%m => %p\n', which makes ldd behave analogously to nm -o.  It
     cannot be combined with -f.

     The -v option turns on verbose mode.


EXIT STATUS

     The ldd utility exits 0 on success, and >0 if an error occurs.


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.

NetBSD 10.99                   February 1, 2025                   NetBSD 10.99