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CC(1) UNIX Programmer's Manual CC(1)

NNAAMMEE
cc - C compiler

SSYYNNOOPPSSIISS
cccc [ option ] ... file ...

DDEESSCCRRIIPPTTIIOONN
_C_c is the UNIX C compiler. _C_c accepts several types of
arguments:

Arguments whose names end with `.c' are taken to be C source
programs; they are compiled, and each object program is left
on the file whose name is that of the source with `.o' sub-
stituted for `.c'. The `.o' file is normally deleted, how-
ever, if a single C program is compiled and loaded all at
one go.

In the same way, arguments whose names end with `.s' are
taken to be assembly source programs and are assembled, pro-
ducing a `.o' file.

The following options are interpreted by _c_c. See _l_d(1) for
load-time options.

--cc Suppress the loading phase of the compilation, and
force an object file to be produced even if only one
program is compiled.

--gg Have the compiler produce additional symbol table
information for _d_b_x(1). Also pass the --llgg flag to
_l_d(1).

--ggoo Have the compiler produce additional symbol table
information for the obsolete debugger _s_d_b(1). Also
pass the --llgg flag to _l_d(1).

--ww Suppress warning diagnostics.

--pp Arrange for the compiler to produce code which
counts the number of times each routine is called.
If loading takes place, replace the standard startup
routine by one which automatically calls _m_o_n_i_t_o_r(3)
at the start and arranges to write out a _m_o_n._o_u_t
file at normal termination of execution of the
object program. An execution profile can then be
generated by use of _p_r_o_f(1).

--ppgg Causes the compiler to produce counting code in the
manner of --pp,, but invokes a run-time recording
mechanism that keeps more extensive statistics and
produces a _g_m_o_n._o_u_t file at normal termination.
Also, a profiling library is searched, in lieu of

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CC(1) UNIX Programmer's Manual CC(1)

the standard C library. An execution profile can
then be generated by use of _g_p_r_o_f(1).

--OO Invoke an object-code improver.

--RR Passed on to _a_s, making initialized variables shared
and read-only.

--SS Compile the named C programs, and leave the
assembler-language output on corresponding files
suffixed `.s'.

--MM Run only the macro preprocessor on the named C pro-
grams, requesting it to generate Makefile dependen-
cies and send the result to the standard output.

--EE Run only the macro preprocessor on the named C pro-
grams, and send the result to the standard output.

--CC prevent the macro preprocessor from eliding com-
ments.

--oo _o_u_t_p_u_t
Name the final output file _o_u_t_p_u_t. If this option
is used the file `a.out' will be left undisturbed.

--DD_n_a_m_e=_d_e_f
--DD_n_a_m_e Define the _n_a_m_e to the preprocessor, as if by
`#define'. If no definition is given, the name is
defined as "1".

--UU_n_a_m_e Remove any initial definition of _n_a_m_e.

--II_d_i_r `#include' files whose names do not begin with `/'
are always sought first in the directory of the _f_i_l_e
argument, then in directories named in --II options,
then in directories on a standard list.

--LL_d_i_r Library archives are sought first in directories
named in --LL options, then in directories on a stan-
dard list.

--ff Use an alternate compiler which does not convert
expressions involving only floats to double. This
does not conform to the standard which states that
all intermediate results should be converted to dou-
ble but does provide a speed improvement for pro-
grams which don't require full double precision.
This option also makes rreeggiisstteerr ffllooaatt variables work
appropriately.

--BB_s_t_r_i_n_g

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CC(1) UNIX Programmer's Manual CC(1)

Find substitute compiler passes in the files named
_s_t_r_i_n_g with the suffixes cpp, ccom and c2. If
_s_t_r_i_n_g is empty, use a standard backup version.

--tt[pp001122]
Find only the designated compiler passes in the
files whose names are constructed by a --BB option.
In the absence of a --BB option, the _s_t_r_i_n_g is taken
to be `/usr/c/'.

Other arguments are taken to be either loader option argu-
ments, or C-compatible object programs, typically produced
by an earlier _c_c run, or perhaps libraries of C-compatible
routines. These programs, together with the results of any
compilations specified, are loaded (in the order given) to
produce an executable program with name aa..oouutt..

FFIILLEESS
file.c input file
file.o object file
a.out loaded output
/tmp/ctm? temporary
/lib/cpp preprocessor
/lib/ccom compiler
/lib/sccom compiler for single precision floats
/usr/c/occom backup compiler
/usr/c/ocpp backup preprocessor
/lib/c2 optional optimizer
/lib/crt0.o runtime startoff
/lib/mcrt0.o startoff for profiling
/usr/lib/gcrt0.ostartoff for gprof-profiling
/lib/libc.a standard library, see _i_n_t_r_o(3)
/usr/lib/libc_p.aprofiling library, see _i_n_t_r_o(3)
/usr/include standard directory for `#include' files
mon.out file produced for analysis by _p_r_o_f(1)
gmon.out file produced for analysis by _g_p_r_o_f(1)

SSEEEE AALLSSOO
B. W. Kernighan and D. M. Ritchie, _T_h_e _C _P_r_o_g_r_a_m_m_i_n_g
_L_a_n_g_u_a_g_e, Prentice-Hall, 1978
B. W. Kernighan, _P_r_o_g_r_a_m_m_i_n_g _i_n _C-_a _t_u_t_o_r_i_a_l
D. M. Ritchie, _C _R_e_f_e_r_e_n_c_e _M_a_n_u_a_l
monitor(3), prof(1), gprof(1), adb(1), ld(1), dbx(1), as(1)

DDIIAAGGNNOOSSTTIICCSS
The diagnostics produced by C itself are intended to be
self-explanatory. Occasional messages may be produced by
the assembler or loader.

BBUUGGSS
The compiler currently ignores advice to put cchhaarr, uunnssiiggnneedd
cchhaarr, sshhoorrtt, uunnssiiggnneedd sshhoorrtt, ffllooaatt, or ddoouubbllee variables in

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CC(1) UNIX Programmer's Manual CC(1)

registers, except as noted above. It previously produced
poor, and in some cases incorrect, code for such declara-
tions.

Printed 7/9/88 June 7, 1985 4