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NAME
ldd - print shared object dependencies
SYNOPSIS
ldd [option]... file...
DESCRIPTION
ldd prints the shared objects (shared libraries) required by each program or shared object specified on
the command line.
Security
In the usual case, ldd invokes the standard dynamic linker (see ld.so(8)) with the
LD_TRACE_LOADED_OBJECTS environment variable set to 1, which causes the linker to display the library
dependencies. Be aware, however, that in some circumstances, some versions of ldd may attempt to obtain
the dependency information by directly executing the program. Thus, you should never employ ldd on an
untrusted executable, since this may result in the execution of arbitrary code. A safer alternative when
dealing with untrusted executables is:
$ objdump -p /path/to/program | grep NEEDED
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.
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
pldd(1), sprof(1), ld.so(8), ldconfig(8)
COLOPHON
This page is part of release 4.04 of the Linux man-pages project. A description of the project,
information about reporting bugs, and the latest version of this page, can be found at
http://www.kernel.org/doc/man-pages/.
2015-08-08 LDD(1)