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]
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.
- -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
- turn on floating point support, no effect with i386, changes libc library
with 8086 code.
- -g
- produce debugging info (ignored.)
- -o
- output file name follows (assembler, object or executable) (as usual)
- -p
- produce profiling info (ignored.)
- -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.
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.
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.
- BCC_EXEC_PREFIX
- default directory to seach for compiler passes
- TMPDIR
- directory to place temporary files (default /tmp)
All the include, library and compiler components are stored under
the /usr/lib/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.
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.