| 1 | .\" $NetBSD$
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| 2 | .\" $Id: ccom.1,v 1.9 2010/04/05 13:13:57 reed Exp $
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| 3 | .\"
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| 4 | .\" Copyright (c) 2007 Jeremy C. Reed <reed@reedmedia.net>
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| 5 | .\" Permission to use, copy, modify, and/or distribute this software for any
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| 6 | .\" purpose with or without fee is hereby granted, provided that the above
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| 7 | .\" copyright notice and this permission notice appear in all copies.
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| 8 | .\"
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| 9 | .\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR AND CONTRIBUTORS DISCLAIM
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| 10 | .\" ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
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| 11 | .\" WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL AUTHOR AND
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| 12 | .\" CONTRIBUTORS BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
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| 13 | .\" DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
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| 14 | .\" PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
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| 15 | .\" ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
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| 16 | .\" THIS SOFTWARE.
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| 17 | .Dd September 14, 2007
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| 18 | .Dt CCOM 1
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| 19 | .Os
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| 20 | .Sh NAME
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| 21 | .Nm ccom
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| 22 | .Nd C compiler
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| 23 | .Sh SYNOPSIS
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| 24 | .Nm
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| 25 | .Op Fl gs
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| 26 | .Op Fl W Ar flags
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| 27 | .Op Fl X Ar flags
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| 28 | .Op Fl x Ar optimizations
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| 29 | .Op Fl Z Ar flags
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| 30 | .Op infile
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| 31 | .Op outfile
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| 32 | .Sh DESCRIPTION
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| 33 | The
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| 34 | .Nm
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| 35 | utility provides a C compiler.
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| 36 | The frontend is usually
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| 37 | .Xr pcc 1 .
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| 38 | It is
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| 39 | .Em not
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| 40 | intended to be run directly.
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| 41 | .Pp
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| 42 | .Nm
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| 43 | reads the C source from
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| 44 | .Ar infile
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| 45 | or standard input and writes the assembler source
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| 46 | to
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| 47 | .Ar outfile
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| 48 | or to standard output.
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| 49 | .Pp
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| 50 | The options are as follows:
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| 51 | .Bl -tag -width Ds
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| 52 | .It Fl g
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| 53 | Enable debugging.
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| 54 | .\" built into binary, explain stabs?
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| 55 | .It Fl k
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| 56 | Generate PIC code.
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| 57 | .It Fl s
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| 58 | Print statistics to standard error when complete.
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| 59 | This includes:
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| 60 | name table entries, name string size, permanent allocated memory,
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| 61 | temporary allocated memory, lost memory, argument list unions,
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| 62 | dimension/function unions, struct/union/enum blocks, inline node count,
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| 63 | inline control blocks, and permanent symtab entries.
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| 64 | .\" TODO: explain units for above?
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| 65 | .It Fl v
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| 66 | Display version.
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| 67 | .It Fl W Ar flags
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| 68 | Report warnings.
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| 69 | (Do some basic checks.)
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| 70 | .Em NOTE!
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| 71 | .Em These are subject to change RSN!
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| 72 | .Ar flags
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| 73 | is one or more of the following:
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| 74 | .Bl -tag -width Ds
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| 75 | .It Sy error
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| 76 | Report all warnings as errors.
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| 77 | .It Sy implicit
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| 78 | Implies
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| 79 | .Sy implicit-function-declaration
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| 80 | and
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| 81 | .Sy implicit-int .
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| 82 | .It Sy implicit-function-declaration
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| 83 | Report if no prototype was declared for a function.
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| 84 | .It Sy implicit-int
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| 85 | TODO
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| 86 | .It Sy missing-prototypes
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| 87 | TODO
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| 88 | .It Sy strict-prototypes
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| 89 | TODO
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| 90 | .It Sy W
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| 91 | Enable all warnings.
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| 92 | .El
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| 93 | .\"
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| 94 | .It Fl X Ar flags
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| 95 | C specific debugging where
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| 96 | .Ar flags
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| 97 | is one or more of the following:
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| 98 | .Bl -tag -width Ds
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| 99 | .It Sy b
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| 100 | Building of parse trees
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| 101 | .It Sy d
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| 102 | Declarations (using multiple
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| 103 | .Sy d
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| 104 | flags gives more output)
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| 105 | .It Sy e
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| 106 | Pass1 trees at exit
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| 107 | .It Sy i
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| 108 | Initializations
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| 109 | .It Sy n
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| 110 | Memory allocations
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| 111 | .It Sy o
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| 112 | Turn off optimisations
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| 113 | .It Sy p
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| 114 | Prototypes
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| 115 | .It Sy s
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| 116 | Inlining
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| 117 | .It Sy t
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| 118 | Type conversions
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| 119 | .It Sy x
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| 120 | Target-specific flag, used in machine-dependent code
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| 121 | .El
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| 122 | .\"
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| 123 | .It Fl x Ar optimizations
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| 124 | .Ar optimizations
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| 125 | is one of the following:
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| 126 | .\" TODO: reword this, since multiple terms don't go with one -x switch??
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| 127 | .Bl -tag -width deljumps
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| 128 | .It Sy deljumps
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| 129 | Delete redundant jumps and dead code.
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| 130 | .It Sy ssa
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| 131 | Convert statements into SSA form for optimization.
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| 132 | Not yet finished.
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| 133 | .It Sy tailcall
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| 134 | Currently not implemented.
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| 135 | .It Sy temps
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| 136 | Setting this flag allows variables to be put into registers, for further
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| 137 | optimization by the register allocator.
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| 138 | .El
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| 139 | The
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| 140 | .Fl x
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| 141 | flag can be passed multiple times to set different options.
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| 142 | .\"
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| 143 | .It Fl Z Ar flags
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| 144 | Code generator (pass2) specific debugging where
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| 145 | .Ar flags
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| 146 | is one or more of the following:
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| 147 | .Bl -tag -width Ds
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| 148 | .It Sy b
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| 149 | Basic block and SSA building
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| 150 | .It Sy c
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| 151 | Code printout
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| 152 | .It Sy e
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| 153 | Trees when entering pass2
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| 154 | .It Sy f
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| 155 | Instruction matcher, may provide much output
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| 156 | .It Sy n
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| 157 | Memory allocation
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| 158 | .It Sy o
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| 159 | Instruction generator
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| 160 | .It Sy r
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| 161 | Register allocator
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| 162 | .It Sy s
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| 163 | Shape matching in instruction generator
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| 164 | .It Sy t
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| 165 | Type matching in instruction generator
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| 166 | .It Sy u
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| 167 | Sethi-Ullman computations
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| 168 | .It Sy x
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| 169 | Target-specific flag, used in machine-dependent code
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| 170 | .El
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| 171 | .El
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| 172 | .Sh SEE ALSO
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| 173 | .Xr as 1 ,
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| 174 | .Xr cpp 1 ,
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| 175 | .Xr pcc 1
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| 176 | .Sh HISTORY
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| 177 | The
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| 178 | .Nm
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| 179 | compiler is based on the original Portable C Compiler by S. C. Johnson,
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| 180 | written in the late 70's.
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| 181 | Even though much of the compiler has been rewritten, some of the
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| 182 | basics still remain.
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| 183 | About 50% of the frontend code and 80% of the backend code has been
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| 184 | rewritten.
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| 185 | Most is written by Anders Magnusson, with the exception of
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| 186 | the data-flow analysis part and the SSA conversion code which is
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| 187 | written by Peter A Jonsson, and the Mips port that were written as
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| 188 | part of a project by undergraduate students at Lulea University of
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| 189 | Technology.
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| 190 | .Pp
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| 191 | This product includes software developed or owned by Caldera
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| 192 | International, Inc.
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