12-19-2009
But ldd prints the shared libraries required by each program or shared library specified on the command line. We have many static libraries also mentioned in our makefile
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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.
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 exe-
cutable, 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.
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 3.53 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/.
2012-07-16 LDD(1)