Library component
| Content
| Inclusion guidelines
|
ld
(This library component is not itself a library. Instead, ld.so is an executable invoked by the ELF binary format loader to load the dynamically linked
libraries into an application’s memory space.)
| Dynamic linker.
| Compulsory. Needed to use any shared libraries.
Theoretically not necessary if using only a statically
built root filesystem—although this is quite rare,
unless you are only using BusyBox, for example.
|
libBrokenLocale
| Fixup routines to get applications that have
broken locale features to run. Overrides application
defaults through preloading. (Need to
use LD_PRELOAD.)
| Rarely used.
|
libSegFault
| Routines for catching segmentation faults and
doing backtraces.
| Rarely used.
|
libanl
| Asynchronous name lookup routines.
| Rarely used.
|
libbsd-compat
| Dummy library for certain BSD programs that
are compiled with -lbsd-compat.
| Rarely used.
|
libc
| Main C library routines
| Compulsory.
|
libcrypt
| Cryptography routines.
| Required for most applications involved in
authentication.
|
libdl
| Routines for loading shared objects
dynamically
| Required for applications that use functions such as
dlopen().
|
libm
| Math routines.
| Required for math functions.
|
libmemusage
| Routines for heap and stack memory profiling.
| Rarely used.
|
libnsl
| NIS network services library routines.
| Rarely used.
|
libnss_compat
| Name Switch Service (NSS) compatibility routines for NIS.
| Loaded automatically by the glibc NSS
|
libnss_dns
| NSS routines for DNS.
| Loaded automatically by the glibc NSS
|
libnss_files
| NSS routines for file lookups.
| Loaded automatically by the glibc NSS
|
libnss_hesiod
| NSS routines for Hesiod name service.
| Loaded automatically by the glibc NSS
|
libnss_nis
| NSS routines for NIS.
| Loaded automatically by the glibc NSS
|
libnss_nisplus
| NSS routines for NIS plus.
| Loaded automatically by the glibc NSS
|
libpcprofile
| Program counter profiling routines
| Rarely used.
|
libpthread
| POSIX 1003.1c threads routines for Linux.
| Required for threads programming.
|
libresolv
| Name resolver routines.
| Required for name resolution.
|
librt
| Asynchronous I/O routines.
| Rarely used.
|
libthread_db
| Thread debugging routines.
| Loaded automatically by gdb when debugging threaded
applications. Never actually linked to by any
application.
|
libutil
| Login routines, part of the user accounting database.
| Required for terminal connection management.
|
