MAN page from Mandrake 10.X dev86-0.16.3-2mdk.i586.rpm


Section: User Commands (1)
Updated: Nov, 1997


bcc - Bruce's C compiler 


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


Bccis a simple C compiler that produces 8086 assembler, in addition compilercompile time options allow 80386 or 6809 versions. The compiler understandstraditional K&R C with just the restriction that bit fields are mapped toone of the other integer types.

The default operation is to produce an 8086 executable calleda.outfrom the source file.



Pass the C source throughunprotoizeafter preprocessing and before code generation. This will allowsomeansi C to be compiled but it is definitlyNOTa true ansi-C compiler.
8086 target (works on 80386 host, but not 6809)
80386 target (may work on 8086 host, but not 6809)
pass remainder of option to assembler (e.g. -A-l -Alistfile for a listing)
prefix for executable search path (as usual; the search order is all pathsspecified using-B,in order, then the path given in the environment variableBCC_EXEC_PREFIXif that is set, then the compiled-in defaults(something like /usr/lib/bcc/ followed by /usr/bin/)
pass remainder of option to bcc-cc1, see code generation options.
preprocessor define
produce preprocessor output to standard out.
produce GCC objects (only useful for i386 code)
include search 'xyz' path
don't add default include to search list
add directory name 'xyz' to the head of the list of library directories searched
don't add default library to search list
alters the arguments for all passes to produce MSDOS executable COM files.These are small model executables, use-ito get tiny model.
sets bcc to pass the-cand-farguments to the code generator for smaller faster code. Note this code isnot compatible with the standard calling conventions so a different versionof the C library is linked too.
sets bcc to pass the-cargument to the code generator for smaller faster code. Note the standardlibc is normally transparent to this, but there are exceptions.
alters the arguments for all passes and selects C-libraryto produce standalone Linux-86 executables
switches to i386-Linux code generator and library.This configuration accepts the-zflag to generate QMAGIC a.out files instead of the normal OMAGIC.
makes the linker produce a native a.out file (Linux OMAGIC) if combinedwith -3 the executable will run under Linux-i386.
optimize, callcopt(1)to optimize 8086 code. Specifiers to choose which rules coptshould use can be appended to the-Oand the option can be repeated.
produce preprocessor output with no line numbers to standard output.
pass full option to c386 (Only for c386 version)
produce assembler file
temporary directory (overrides previous value and default; default isfrom the environment variable TMPDIR if that is set, otherwise /tmp)
preprocessor undefine
print names of files being compiled
pass remainder of option to linker (e.g. -X-Ofile is passed to the linkeras -Ofile)
produce object file
run the preprocess pass separately. This takes less memory, and may helpor harm by giving more traditional semantics like token pasting with /**/.
error (float emulation not supported)
produce debugging info (does nothing)
output file name follows (assembler, object or executable) (as usual)
error (profiling not supported)
pass to the assembler to renumber the text segment for multi-segment programs.
print names and args of subprocesses being run. Two or more -v's printnames of files being unlinked. Three or more -v's print names of pathsbeing searched.
Supress any warning diagnostics.
Turnonassembler warning messages.
don't include crt0.o in the link.
don't pass-ito 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 passbcc-cc1understands, only some will be useful for the-Coption of bcc. The code generator is normally used as a combined C preprocessorand generator but the-eand-ansioptions of bcc split the operation.
8086 target (works even on 80386 host, not on 6809)
80386 target (may work even on 8086 host, not on 6809)
define (as usual)
produce preprocessor output (as usual)
include search path (as usual)
produce preprocessor output with no line numbers (as usual)
produce code with caller saving regs before function calls
print debugging information in assembly output
produce code with 1st argument passed in a register (AX, EAX or X)
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.
assembler output file name follows
produce (almost) position-independent code (only for the 6809)
print source code in assembly output
print what cc1 thinks is the location counter in assembly outputAll the options except -D, -I and -o may be turned off by following theoption letter by a '-'. Options are processed left to right so the lastsetting has precedence.



The preprocessor has a number of manifest constants.
__BCC__ 1
The compiler identifier, normally used to avoid compiler limitations.
stringized name of current input file
current line number
__MSDOS__ 1
compiler is configured for generating MSDOS executable COM files.
compiler is configured for generating standalone executables.
__AS386_16__ 1
compiler is generating 16 bit 8086 assembler and the#asmkeyword is available for including 8086 code.
__AS386_32__ 1
compiler is generating 32 bit 80386 assembler and the#asmkeyword is available for including 80386 code.
compiler calling conventions are altered so the calling function must save theSIandDIregisters if they are in use (ESI and EDI on the 80386)
compiler calling conventions are altered so the calling function is passingthe first argument to the function in theAX(orEAX)register.
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
the first argument to functions is passed in theXregister.
the code generated is (almost) position independent.


default directory to seach for compiler passes
directory to place temporary files (default /tmp)


All the include, library and compiler components are stored under the/usr/bccdirectory under Linux-i386, this is laid out the same as a/usrfilesystem and if bcc is to be the primary compiler on a system it shouldbe moved there. The configuration for this is in thebcc.csource 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 bccexecutable itself,as86andld86are in /usr/bin.



as86(1), ld86(1), elksemu(1) 


The bcc.c compiler driver source is very untidy.

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




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