freebsd-dev/usr.bin/ldd/ldd.1

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.\" $FreeBSD$
.\"
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.Dd October 22, 1993
.Dt LDD 1
.Os
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.Sh NAME
.Nm ldd
.Nd list dynamic object dependencies
.Sh SYNOPSIS
.Nm
.Op Fl a
.Op Fl v
.Op Fl f Ar format
.Ar program ...
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.Sh DESCRIPTION
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The
.Nm
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utility displays all shared objects that are needed to run the given program or
to load the given shared object.
Contrary to
.Xr nm 1 ,
the list includes
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.Dq indirect
dependencies that are the result of needed shared objects which themselves
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depend on yet other shared objects.
.Pp
Zero, one or two
.Fl f
options may be given.
The argument is a format string passed to
.Xr rtld 1
and allows customization of
.Nm Ns 's
output.
See
.Xr rtld 1
for a list of recognized conversion characters.
.Pp
The
.Fl a
option displays the list of all objects that are needed by each loaded
object.
This option does not work with
.Xr a.out 5
binaries.
.Pp
The
.Fl v
option displays an verbose listing of the dynamic linking headers
encoded in the executable.
See the source code and include
files for the definitive meaning of all the fields.
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.Sh SEE ALSO
.Xr ld 1 ,
.Xr nm 1 ,
.Xr rtld 1
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.Sh HISTORY
A
.Nm
utility first appeared in SunOS 4.0, it appeared in its current form in
.Fx 1.1 .
.Pp
The
.Fl v
support is based on code written by
.An John Polstra Aq jdp@polstra.com