bcc



bcc(1)                                                                  bcc(1)




NAME

       bcc - Bruce’s C compiler


SYNOPSIS

       bcc  [-03EGNOPSVcegvwxW] [-Aas_option] [-Bexecutable_prefix] [-Ddefine]
       [-Uundef] [-Mc_mode] [-o outfile] [-ansi] [-Ccc1_option] [-Pcpp_option]
       [-Iinclude_dir] [-Lld_option] [-Ttmpdir] [-Qc386_option] [-ttext_segno]
       [ld_options] [infiles]


DESCRIPTION

       Bcc is a simple C compiler that produces 8086  assembler,  in  addition
       compiler  compile  time  options  allow  80386  or  6809  versions. The
       compiler understands traditional K&R C with just the  restriction  that
       bit fields are mapped to one of the other integer types.

       The  default  operation  is  to produce an 8086 executable called a.out
       from the source file.



OPTIONS

       -ansi  Pass the C source through  unprotoize  after  preprocessing  and
              before  code  generation.  This  will  allow  some  ansi C to be
              compiled but it is definitly NOT a true ansi-C compiler.

       -0     8086 target (works on 80386 host, but not 6809)

       -3     80386 target (may work on 8086 host, but not 6809)

       -A     pass remainder of option to assembler (e.g. -A-l -Alistfile  for
              a listing)

       -B     prefix for executable search path (as usual; the search order is
              all paths specified using -B, in order, then the path  given  in
              the  environment  variable  BCC_EXEC_PREFIX if that is set, then
              the compiled-in defaults (something like /usr/lib/bcc/  followed
              by /usr/bin/)

       -C     pass  remainder  of  option  to  bcc-cc1,  see  code  generation
              options.

       -D     preprocessor define

       -E     produce preprocessor output to standard out.

       -G     produce GCC objects (Same as -Mg)

       -Ixyz  include search ’xyz’ path

       -I     don’t add default include to search list

       -Lxyz  add directory name ’xyz’ to the head  of  the  list  of  library
              directories searched

       -L     don’t add default library to search list

       -Md    alters  the arguments for all passes to produce MSDOS executable
              COM files.  These are small model executables,  use  -i  to  get
              tiny model.

       -Mf    sets  bcc  to pass the -c and -f arguments to the code generator
              for smaller faster code. Note this code is not  compatible  with
              the standard calling conventions so a different version of the C
              library is linked too.

       -Mc    sets bcc to pass the -c  argument  to  the  code  generator  for
              smaller   faster  code.  Note  the  standard  libc  is  normally
              transparent to this, but there are exceptions.

       -Ms    alters the arguments for all passes  and  selects  C-library  to
              produce standalone Linux-86 executables

       -Ml    switches   to  i386-Linux  code  generator  and  library.   This
              configuration accepts the -z flag to generate QMAGIC a.out files
              instead of the normal OMAGIC.

       -Mg    switches  to  i386-Linux  code  generator  and  generates OMAGIC
              object files that can be  linked  with  some  versions  of  gcc;
              unfortunatly the most recent versions use ’collect2’ to link and
              this crashes.

       -N     makes the linker produce a native a.out file (Linux  OMAGIC)  if
              combined with -3 the executable will run under Linux-i386.

       -O     optimize,  call  copt(1)  to  optimize  8086 code. Specifiers to
              choose which rules copt should use can be appended to the -O and
              the option can be repeated.

       -P     produce  preprocessor  output  with  no line numbers to standard
              output.

       -Q     pass full option to c386 (Only for c386 version)

       -S     produce assembler file

       -T     temporary  directory  (overrides  previous  value  and  default;
              default  is from the environment variable TMPDIR if that is set,
              otherwise /tmp)

       -U     preprocessor undefine

       -V     print names of files being compiled

       -X     pass remainder of option to linker (e.g. -X-Ofile is  passed  to
              the linker as -Ofile)

       -c     produce object file

       -f     error (float emulation not supported)

       -g     produce debugging info (does nothing)

       -o     output  file  name follows (assembler, object or executable) (as
              usual)

       -p     error (profiling not supported)

       -t1    pass to the assembler to renumber the text  segment  for  multi-
              segment programs.

       -v     print  names  and  args  of subprocesses being run.  Two or more
              -v’s print names of files being unlinked.  Three  or  more  -v’s
              print names of paths being searched.

       -w     Supress any warning diagnostics.

       -W     Turn on assembler warning messages.

       -x     don’t include crt0.o in the link.

       -i     don’t  pass  -i  to  the linker so that it will create an impure
              executable.

       Other options are passed to the linker, in particular -lx, -M, -m,  -s,
       -H.



CODE GENERATOR OPTIONS

       These are all options that the code generator pass bcc-cc1 understands,
       only some will be useful for the -C option of bcc.

       -0     8086 target (works even on 80386 host, not on 6809)

       -3     80386 target (may work even on 8086 host, not on 6809)

       -D     define (as usual)

       -E     produce preprocessor output (as usual)

       -I     include search path (as usual)

       -P     produce preprocessor output with no line numbers (as usual)

       -c     produce code with caller saving regs before function calls

       -d     print debugging information in assembly output

       -f     produce code with 1st argument passed in a register (AX, EAX  or
              X)

       -l     produce  code  for 2 3 1 0 long byte order (only works in 16-bit
              code), a special library of compiler helper functions is  needed
              for this mode.

       -o     assembler output file name follows

       -p     produce (almost) position-independent code (only for the 6809)

       -t     print source code in assembly output

       -w     print what cc1 thinks is the location counter in assembly output

       All the options except -D, -I and -o may be turned off by following the
       option  letter  by  a  ’-’.  Options are processed left to right so the
       last setting has precedence.



PREPROCESSOR DEFINES

       The preprocessor has a number of manifest constants.

       __BCC__ 1
              The  compiler  identifier,  normally  used  to  avoid   compiler
              limitations.

       __FILE__
              stringized name of current input file

       __LINE__
              current line number

       __MSDOS__ 1
              compiler  is  configured  for  generating  MSDOS  executable COM
              files.

       __STANDALONE__ 1
              compiler is configured for generating standalone executables.

       __AS386_16__ 1
              compiler is generating  16  bit  8086  assembler  and  the  #asm
              keyword is available for including 8086 code.

       __AS386_32__ 1
              compiler  is  generating  32  bit  80386  assembler and the #asm
              keyword is available for including 80386 code.

       __CALLER_SAVES__ 1
              compiler calling conventions are altered so the calling function
              must  save  the  SI and DI registers if they are in use (ESI and
              EDI on the 80386)

       __FIRST_ARG_IN_AX__ 1
              compiler calling conventions are altered so the calling function
              is  passing the first argument to the function in the AX (or EAX
              ) register.

       __LONG_BIG_ENDIAN__ 1
              alters the word order of code generated by the 8086 compiler.

       These defines only occur in the 6809 version of the compiler.

       __AS09__ 1
              compiler is generating 6809 code

       __FIRST_ARG_IN_X__ 1
              the first argument to functions is passed in the X register.

       __POS_INDEPENDENT__ 1
              the code generated is (almost) position independent.



ENVIRONMENT

       BCC_EXEC_PREFIX
              default directory to seach for compiler passes

       TMPDIR directory to place temporary files (default /tmp)



DIRECTORIES

       All the include, library and compiler components are stored  under  the
       /usr/bcc  directory  under  Linux-i386,  this is laid out the same as a
       /usr filesystem and if bcc is to be the primary compiler on a system it
       should  be  moved  there.  The  configuration  for this is in the bcc.c
       source file only, all other executables are independent of location.

       The library installation also creates the  file  /usr/lib/liberror.txt,
       this path is hardcoded into the C library.

       The bcc executable itself, as86 and ld86 are in /usr/bin.



SEE ALSO

       as86(1), ld86(1), elksemu(1)


BUGS

       The bcc.c compiler driver source is very untidy.

       The  linker,  ld86,  produces  a  broken a.out object file if given one
       input and the -r option this is so  it  is  compatible  with  pre-dev86
       versions.



                                   Nov, 1997                            bcc(1)

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