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CCOM(1)                DragonFly General Commands Manual               CCOM(1)

NAME
     ccom - C compiler

SYNOPSIS
     ccom [-gs] [-W flags] [-X flags] [-x optimizations] [-Z flags] [infile]
          [outfile]

DESCRIPTION
     The ccom utility provides a C compiler.  The frontend is usually pcc(1).
     It is not intended to be run directly.

     ccom reads the C source from infile or standard input and writes the
     assembler source to outfile or to standard output.

     The options are as follows:

     -g      Enable debugging.

     -k      Generate PIC code.

     -s      Print statistics to standard error when complete.  This includes:
             name table entries, name string size, permanent allocated memory,
             temporary allocated memory, lost memory, argument list unions,
             dimension/function unions, struct/union/enum blocks, inline node
             count, inline control blocks, and permanent symtab entries.

     -v      Display version.

     -W flags
             Report warnings.  (Do some basic checks.)  NOTE! These are
             subject to change RSN! flags is one or more of the following:

             error   Report all warnings as errors.

             implicit
                     Implies implicit-function-declaration and implicit-int.

             implicit-function-declaration
                     Report if no prototype was declared for a function.

             implicit-int
                     TODO

             missing-prototypes
                     TODO

             strict-prototypes
                     TODO

             W       Enable all warnings.

     -X flags
             C specific debugging where flags is one or more of the following:

             b       Building of parse trees

             d       Declarations (using multiple d flags gives more output)

             e       Pass1 trees at exit

             i       Initializations

             n       Memory allocations

             o       Turn off optimisations

             p       Prototypes

             s       Inlining

             t       Type conversions

             x       Target-specific flag, used in machine-dependent code

     -x optimizations
             optimizations is one of the following:

             deljumps  Delete redundant jumps and dead code.

             ssa       Convert statements into SSA form for optimization.  Not
                       yet finished.

             tailcall  Currently not implemented.

             temps     Setting this flag allows variables to be put into
                       registers, for further optimization by the register
                       allocator.
             The -x flag can be passed multiple times to set different
             options.

     -Z flags
             Code generator (pass2) specific debugging where flags is one or
             more of the following:

             b       Basic block and SSA building

             c       Code printout

             e       Trees when entering pass2

             f       Instruction matcher, may provide much output

             n       Memory allocation

             o       Instruction generator

             r       Register allocator

             s       Shape matching in instruction generator

             t       Type matching in instruction generator

             u       Sethi-Ullman computations

             x       Target-specific flag, used in machine-dependent code

SEE ALSO
     as(1), cpp(1), pcc(1)

HISTORY
     The ccom compiler is based on the original Portable C Compiler by S. C.
     Johnson, written in the late 70's.  Even though much of the compiler has
     been rewritten, some of the basics still remain.  About 50% of the
     frontend code and 80% of the backend code has been rewritten.  Most is
     written by Anders Magnusson, with the exception of the data-flow analysis
     part and the SSA conversion code which is written by Peter A Jonsson, and
     the Mips port that were written as part of a project by undergraduate
     students at Lulea University of Technology.

     This product includes software developed or owned by Caldera
     International, Inc.

DragonFly 6.5-DEVELOPMENT     September 14, 2007     DragonFly 6.5-DEVELOPMENT