This section provides an overview of the C
library functions, their error returns and other
common definitions and concepts.
Most of these functions are available from the C library,
libc
Other libraries, such as the math library,
libm
must be indicated at compile time with the
-l
option of the compiler.
The various libraries (followed by the loader flag):
libcPqFllNsArc
Standard C library functions.
When using the C compiler
cc(1),
it is not necessary
to supply the loader flag
-l c
for these functions.
There are several `libraries' or groups of functions included inside of
libc:
the standard
I/O
routines,
database routines,
bit operators,
string operators,
character tests and character operators,
des encryption routines,
storage allocation, time functions, signal handling and more.
libcursesPqFllNsArcursesFllNsArtermcap
Terminal independent screen management routines
for two dimensional non-bitmap display terminals.
(See
ncurses(3).)
libcompatPqFllNsArcompat
Functions which are obsolete but are available for compatibility with
BSD 4.3
In particular,
a number of system call interfaces provided in previous releases of
BSD have been included for source code compatibility.
Use of these routines should, for the most part, be avoided.
The manual page entry for each compatibility routine
indicates the proper interface to use.
libkvmPqFllNsArkvm
Functions used to access kernel memory are in this library.
They can be used
against both a running system and a crash dump.
(See
kvm(3).)
The math library,
libm
The math library is loaded as needed by the Pascal compiler,
but not by the C compiler which requires the
-l m
flag.
(See
math(3).)
libmpPqFllNsArmp
libtermcapPqFllNsArtermcap
The terminal independent operation library package.
(See
termcap(3).)
