ldd
is a command available in linux that can be used to check the shared library dependencies
of the executable of even a shared library
Basic
Example,
[root@vx111a
bin]# ldd java
linux-gate.so.1 => (0x00f45000)
libpthread.so.0 =>
/lib/libpthread.so.0 (0x00887000)
libjli.so =>
/usr/jdk1.6.0_14/bin/../jre/lib/i386/jli/libjli.so (0x00fce000)
libdl.so.2 => /lib/libdl.so.2
(0x00880000)
libc.so.6 => /lib/libc.so.6
(0x006fa000)
/lib/ld-linux.so.2 (0x006db000)
We
can Use Ldd to find any Unused Direct Dependencies too like
[root@vx111a
bin]# ldd -u java
Unused
direct dependencies:
/lib/libpthread.so.0
/usr/jdk1.6.0_14/bin/../jre/lib/i386/jli/libjli.so
/lib/libdl.so.2
Here are
the Syntax and options for the command
ldd
[OPTION]... FILE...
Option
Option Description
-v Print all information, including e.g.
symbol versioning information.
-d Perform relocations and report any
missing objects (ELF only).
-r Perform relocations for both data
objects and functions, and report any missing objects or functions (ELF only).
-u Print unused direct dependencies.
-help
Usage information.
