LDD(1) manual page
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ldd - print shared library dependencies
ldd [option]...
file...
ldd prints the shared libraries required by each program
or shared library specified on the command line.
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
- --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.
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.
sprof(1)
, pldd(1)
, ld.so(8)
, ldconfig(8)
This page is
part of release 3.78 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/.
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