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CC(1)			     General Commands Manual			   CC(1)

NAME
     cc, pcc - C compiler

SYNOPSIS
     cc [ option ] ... file ...

     pcc [ option ] ... file ...

DESCRIPTION
     Cc is the UNIX C compiler.  It 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' substituted for `.c'.  The `.o' file	is  nor-
     mally deleted, however, 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 assem-
     bly source programs and are assembled, producing a `.o' file.

     The  following  options are interpreted by cc.  See ld(1) for load-time op-
     tions.

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

     -p      Arrange for the compiler to produce code which counts the number of
	     times each routine is called; also, if loading takes place, replace
	     the standard startup routine by one which automatically calls moni-
	     tor(3)  at  the  start  and arranges to write out a mon.out file at
	     normal termination of execution of the object program.   An  execu-
	     tion profile can then be generated by use of prof(1).

     -f      In  systems without hardware floating-point, use a version of the C
	     compiler which handles floating-point constants and loads	the  ob-
	     ject  program  with  the floating-point interpreter.  Do not use if
	     the hardware is present.

     -O      Invoke an object-code optimizer.

     -S      Compile the named C programs, and leave the assembler-language out-
	     put on corresponding files suffixed `.s'.

     -P      Run only the macro preprocessor and place the result for each  `.c'
	     file in a corresponding `.i' file and has no `#' lines in it.

     -E      Run only the macro preprocessor and send the result to the standard
	     output.  The output is intended for compiler debugging; it is unac-
	     ceptable as input to cc.

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

     -Dname=def
     -Dname  Define the name to the preprocessor, as if by `#define'.  If no de-
	     finition is given, the name is defined as 1.

     -Uname  Remove any initial definition of name.

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

     -Bstring
	     Find  substitute compiler passes in the files named string with the
	     suffixes cpp, c0, c1 and c2.  If string is empty,	use  a	standard
	     backup version.

     -t[p012]
	     Find  only  the designated compiler passes in the files whose names
	     are constructed by a -B option.  In the absence of a -B option, the
	     string is taken to be `/usr/c/'.

     Other arguments are taken to be either loader option arguments,  or  C-com-
     patible  object  programs, typically produced by an earlier cc run, or per-
     haps 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 a.out.

     The major purpose of the `portable C compiler', pcc, is to serve as a model
     on which to base other compilers.	Pcc does not support options -f, -E, -B,
     and -t.  It provides, in addition to the language of cc, unsigned char type
     data and initialized bit fields.

FILES
     file.c	     input file
     file.o	     object file
     a.out	     loaded output
     /tmp/ctm?	     temporaries for cc
     /lib/cpp	     preprocessor
     /lib/c[01]      compiler for cc
     /usr/c/oc[012]  backup compiler for cc
     /usr/c/ocpp     backup preprocessor
     /lib/fc[01]     floating-point compiler
     /lib/c2	     optional optimizer
     /lib/crt0.o     runtime startoff
     /lib/mcrt0.o    startoff for profiling
     /lib/fcrt0.o    startoff for floating-point interpretation
     /lib/libc.a     standard library, see intro(3)
     /usr/include    standard directory for `#include' files
     /tmp/pc*	     temporaries for pcc
     /usr/lib/ccom   compiler for pcc

SEE ALSO
     B.  W.  Kernighan	and D. M. Ritchie, The C Programming Language, Prentice-
     Hall, 1978
     D. M. Ritchie, C Reference Manual
     monitor(3), prof(1), adb(1), ld(1)

DIAGNOSTICS
     The diagnostics produced by C itself are intended to  be  self-explanatory.
     Occasional  messages may be produced by the assembler or loader.  Of these,
     the most mystifying are from the assembler, as(1), in particular `m', which
     means a multiply-defined external symbol (function or data).

BUGS
     Pcc is little tried on the PDP11; specialized code generated for  that  ma-
     chine has not been well shaken down.  The -O optimizer was designed to work
     with cc; its use with pcc is suspect.

				      PDP11				   CC(1)
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