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ldd(1) [netbsd man page]

LDD(1)							    BSD General Commands Manual 						    LDD(1)

ldd -- list dynamic object dependencies SYNOPSIS
ldd [-o] [-f format] program ... DESCRIPTION
ldd displays all shared objects that are needed to run the given program. Contrary to nm(1), the list includes ``indirect'' dependencies that are the result of needed shared objects which themselves depend on yet other shared objects. Zero, one or two -f options may be given. The argument is a format string passed to rtld(1) and allows customization of ldd's output. The first format argument is used for library objects and defaults to " -l%o.%m => %p ". The second format argument is used for non-library objects and defaults to " %o => %p ". These arguments are interpreted as format strings a la printf(3) to customize the trace output and allow ldd to be operated as a filter more conveniently. The following conversions can be used: %a The main program's name (also known as ``__progname''). %A The value of the environment variable LD_TRACE_LOADED_OBJECTS_PROGNAME in a.out and the program name from the argument vector from elf. %o The library name. %m The library's major version number. %n The library's minor version number (a.out only, ignored in elf). %p The full pathname as determined by rtld's library search rules. %x The library's load address Additionally, and are recognized and have their usual meaning. The -o option is an alias for -f %a:-l%o.%m => %p , which makes ldd behave analogously to nm -o. SEE ALSO
ld(1), ld.elf_so(1), nm(1), rtld(1) HISTORY
A ldd utility first appeared in SunOS 4.0, it appeared in its current form in NetBSD 0.9A. BUGS
The a.out ldd actually runs the program it has been requested to analyze which in specially constructed environments can have security impli- cations. BSD
September 7, 2009 BSD

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LDD(1)							     Linux Programmer's Manual							    LDD(1)

ldd - print shared library dependencies SYNOPSIS
ldd prints the shared libraries required by each program or shared library specified on the command line. 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, ldconfig(8) COLOPHON
This page is part of release 3.25 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at 2000-10-30 LDD(1)
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