OpenBSD-4.6/usr.bin/pcc/cc/cc.1

.\"	$OpenBSD: cc.1,v 1.5 2008/08/17 18:40:12 ragge Exp $
.\"
.\" Copyright (c) 2007 Jeremy C. Reed <reed@reedmedia.net>
.\"
.\" Permission to use, copy, modify, and/or distribute this software for any
.\" purpose with or without fee is hereby granted, provided that the above
.\" copyright notice and this permission notice appear in all copies.
.\"
.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR AND CONTRIBUTORS DISCLAIM
.\" ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
.\" WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL AUTHOR AND
.\" CONTRIBUTORS BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
.\" DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
.\" PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
.\" ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
.\" THIS SOFTWARE.
.\"
.Dd September 14, 2007
.Dt CC 1
.Os
.Sh NAME
.Nm cc
.Nd front-end to the C compiler
.Sh SYNOPSIS
.Nm
.Op Fl cEgkLMPOStvXx
.Op Fl fPIC
.Op Fl fpic
.Op Fl m Ns Ar option
.Op Fl nostartfiles
.Op Fl nostdinc
.Op Fl nostdlib
.Op Fl pg
.Op Fl pthread
.Op Fl static
.Op Fl B Ar prefix
.Op Fl D Ar macro[=value]
.Op Fl d Ar option
.Op Fl I Ar directory
.Op Fl include Ar path
.Op Fl isystem Ar path
.Op Fl o Ar outfile
.Op Fl Wl Ar flags
.Op Ar
.Sh DESCRIPTION
The
.Nm
utility provides a front-end to the
.Dq portable C compiler .
Multiple files may be given on the command line.
Unrecognized options are all sent directly to
.Xr ld 1 .
.Pp
.\" Brief description of its syntax:
Filenames that end with
.Sy \&.c
are passed via
.Xr cpp 1 -\*(Gt
.Xr ccom 1 -\*(Gt
.Xr as 1 -\*(Gt
.Xr ld 1 .
.Pp
Filenames that end with
.Sy \&.i
are passed via
.Xr ccom 1 -\*(Gt
.Xr as 1 -\*(Gt
.Xr ld 1 .
.Pp
Filenames that end with
.Sy \&.s
are passed via
.Xr as 1 -\*(Gt
.Xr ld 1 .
.Pp
Filenames that end with
.Sy \&.S
are passed via
.Xr cpp 1 -\*(Gt
.Xr as 1 -\*(Gt
.Xr ld 1 .
.Pp
Filenames that end with
.Sy \&.o
are passed directly to
.Xr ld 1 .
.Pp
.\"
The options are as follows:
.Bl -tag -width Ds
.It Fl B Ar prefix
Define alternate prefix path for
.Xr cpp 1 ,
.Xr ccom 1 ,
.Xr as 1 ,
or
.Xr ld 1
executables.
.\" TODO: provide an example of -B
.It Fl C
Passed to the
.Xr cpp 1
preprocessor to not discard comments.
.It Fl c
Only compile or assemble and then stop.
Do not link.
The resulting object output is saved
as a filename with a
.Dq \&.o
suffix unless
.Fl o
option is used.
Note: cannot be combined with
.Fl o
if multiple files are given.
.It Fl D Ar macro[=value]
Passed to the
.Xr cpp 1
preprocessor to define
.Ar macro .
.It Fl d Ar option
Passed to the
.Xr as 1
assembler.
.\" TODO: what is as -dfoo for?
.It Fl E
Stop after preprocessing with
.Xr cpp 1 .
Do not compile, assemble, or link.
Output is sent to standard output unless the
.Fl o
option is used.
.It Fl fPIC
Generate PIC code.
.\" TODO: document about avoiding machine-specific maximum size?
.It Fl fpic
Tells C compiler to generate PIC code
and tells assembler that PIC code has been generated.
.\" TODO: document difference between PIC and pic
.\" other -f GCC compatibility flags are ignored for now
.It Fl g
Send
.Fl g
flag to
.Xr ccom 1
to create debug output.
This unsets the
.Fl O
option.
.It Fl I Ar path
Passed to the
.Xr cpp 1
preprocessor to add header search directory to override system defaults.
.It Fl include Ar file
Tells the
.Xr cpp 1
preprocessor to include the
.Ar file
during preprocessing.
.It Fl isystem Ar path
Defines
.Ar path
as a system header directory for the
.Xr cpp 1
preprocessor.
.It Fl k
Generate PIC code.
See
.Fl fpic
option.
.It Fl L
TODO
.It Fl M
Pass
.Fl M
flag to
.Xr cpp 1
to generate dependencies for
.Xr make 1 .
.It Fl m Ns options
Target-dependent option.
.Bl -tag -width PowerPC
.It ARM
-mlittle-endian -mbig-endian -mfpe=fpa -mfpe=vpf -msoft-float -march=armv1 -march=armv2 -march=armv2a -march=armv3 -march=armv4 -march=armv4t -march=armv4tej -march=armv5 -march=armv6 -march=armv6t2 -march=armv6kz -march=armv6k -march=armv7
.It HPPA
.It i386
.It MIPS
-mlittle-endian -mbig-endian -mhard-float -msoft-float
.It PDP-10
.It PowerPC
.It Sparc64
.It VAX
.El
.It Fl nostartfiles
Do not link with the system startup files (crt0.c, etc.)
.It Fl nostdinc
Do not use the system include paths (/usr/include, etc.)
.It Fl nostdlib
Do not link with the system C library (libc).
.\" implies -nostartfiles ??
.It Fl O
Enable optimizations.
Currently passes
.Fl xdeljumps
and
.Fl xtemps
to
.Xr ccom 1 .
Note: this is unset if the
.Fl g
option is used.
.It Fl o Ar outfile
Save result to
.Ar outfile .
.It Fl P
TODO
.\" TODO: what is this?
.\" TODO: Looks like it does cpp only, but I couldn't get it to work for me.
.It Fl pg
Enable profiling on the generated executable.
.It Fl pthread
Defines
.Sy _PTHREADS
preprocessor directive for
.Xr cpp 1 .
Uses
.Sy -lpthread
for the
.Xr ld 1
linker.
.It Fl S
Stop after compilation by
.Xr ccom 1 .
Do not assemble and do not link.
The resulting assembler-language output is saved
as a filename with a
.Dq \&.s
suffix unless the
.Fl o
option is used.
Note: cannot be combined with
.Fl o
if multiple files are given.
.It Fl static
Do not use dynamic linkage.
By default, it will link using the dynamic linker options
and/or shared objects for the platform.
.It Fl shared
Create a shared object of the result.  Tells the linker not to 
generate an executable.
.It Fl t
Passes
.Fl t
to
.Xr cpp 1
for traditional C preprocessor syntax.
.It Fl U Ar macro
Passes to the
.Xr cpp 1
preprocessor to remove the initial macro definition.
.It Fl v
Outputs the version of
.Nm
and shows what commands will be run with their command line arguments.
.It Fl Wl Ar flags
Options for the linker.
.\" what is ignored? llist?
.It Fl X
Don't remove temporary files on exit.
.It Fl x
May be used to give separate optimization flags to ccom, see
.Fl O
for options.
.It Fl x Ar c
Gcc compatibility option; specify that the language in use is
.Ar c .
.El
.Ss Predefined Macros
A few
macros are predefined by
.Nm
when sent to
.Xr cpp 1 .
.Bl -diag
.\" TODO:
.\" .It __ASSEMBLER__
.\" Defined if suffix is .S -- why not with .s? what does this mean?
.It __PCC__
Set to the major version of
.Xr pcc 1 .
These macros can be used to select code based on
.Xr pcc 1
compatibility.
See the
.Fl v
option.
.It __PCC_MINOR__
Set to the minor version.
.It __PCC_MINORMINOR__
Set to the minor-minor version -- the number after the minor version.
.It _PTHREADS
Defined when
.Fl pthread
switch is used.
.El
.Pp
Also system- and/or machine-dependent macros may also be predefined;
for example:
.Dv __NetBSD__ ,
.Dv __ELF__ ,
and
.Dv __i386__ .
.Sh SEE ALSO
.Xr as 1 ,
.Xr ccom 1 ,
.Xr cpp 1 ,
.Xr ld 1
.Sh HISTORY
The
.Nm
command comes from the original Portable C Compiler by S. C. Johnson,
written in the late 70's.
.Pp
This product includes software developed or owned by Caldera
International, Inc.