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1998-02-19
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vbcc - portable ANSI C compiler (c) in 1995-98 by Volker Barthelmann
INTRODUCTION
vbcc is a free portable and retargetable ANSI C compiler.
This archive contains the compiler, preprocessor, assembler, linker,
frontend, message browser, startup codes, C-libraries, amiga.lib
replacements as well as several other tools (mostly with complete
source) for 68k as well as PPC.
This gives you a complete system that allows to develop programs in
ANSI C as well as Amiga-specific programs (provided you obtain the
OS-includes) running on 68k or PowerUp-boards.
All major parts of this distribution (including compiler, preprocessor,
libraries etc.) have been compiled/assembled with this system and
apart from the OS-includes everything is included to rebuilt vbcc,
the libraries and many of the other programs.
Note that the programs in this archive all run on the 68k even when
generating PPC-code. There is another archive which contains compilers
that run on the PPC.
FEATURES
vbcc..
- comes with source
- is free
- is portable and retargetable
- comes with a global optimizer that can e.g. do global common
subexpression elimination, constant propagation, function inlining
and several other optimizations (but is not yet finished and may
have some bugs)
- should be ANSI compliant
- can generate code that runs on a plain 68000 CPU
- can generate code optimized for 020/030, 040 or 060
- can generate code that uses the 68881/2, 68040/060 FPUs directly
and comes with appropriate math-libraries
- can generate code that runs on PowerUp-boards
- generates standard Amiga-68k-objects or PPC-ELF-objects
- does not need too much memory
- comes with a message browser
- comes with a config program
- offers a lot of error/warning messages that can be turned on/off
separately
REQUIREMENTS
To use vbcc you need:
- an Amiga with OS 2.0 or higher
- enough RAM (it is possible to translate small programs with 1MB, but
for larger programs much more will be needed)
Stuff that is not needed, but may be very useful:
- harddisk
- editor
- make, touch etc.
- the Amiga OS-includes (they can be found on certain CDs)
- pipe-command (to use the message browser)
Also you should know how to use the shell and you should know ANSI C
(if you need a book I recommend (like everyone) "The C Programming
Language, Second Edition, ANSI C" by Kernighan and Ritchie).
LEGAL
Note that this distribution contains several programs, libraries etc.
that are from different authors and are under different legal status.
So always read the corresponding doc/guide-file to find out under
what conditions a certain file may be used, distributed etc.
For the most part you can assume that you may use everything for
non-commercial purposes and may distribute the unchanged archive
in whole.
Changing any parts from this archive, distributing parts of it or
using it commercially might be legal for certain parts, but illegal
for others, so read all docs carefully before doing any of the above.
This archive contains code written by (this list may be incomplete):
Volker Barthelmann, Frank Wille, Thorsten Schaaps, Dennis Ritchie,
Matthias Fleischer, Gunther Nikl, Mike Schwartz, Kasper Graversen,
Johnny Tevessen
However, if you have any comments/problems etc. with anything, please
do not bother them, but write to me (volker@vb.franken.de) first.
Exceptions are the parts by Kasper Graversen.
INSTALLATION/TUTORIAL
[Names of directories, binaries or assigns have changed since earlier
versions as have config-files. So users of earlier versions should
read this again and do a complete re-install to avoid problems.]
The first step (which you probably already did) is to extract the
entire archive (take care to preserve the file attributes).
The distributed programs are for the most part only usable from a shell.
To use vbcc the following steps are necessary:
1. Assign vbccm68k: to the subdirectory vbcc/machines/amiga68k,
vbccppc: to the subdirectory vbcc/machines/amigappc and
vbcc: to vbccm68k:
2. Assign vlibm68k: to vbccm68k:lib and
vlibppc: to vbccppc:lib.
3. Assign vincludem68k: to vbccm68k:include and
vincludeppc: to vbccppc:include.
If you have the OS-includes you can either add the path to this
assign, e.g.
assign vincludem68k: vbccm68k:include myhd:os-includes
assign vincludeppc: vbccppc:include myhd:os-includes
or you can modify the vc.config (see below).
If you want to use ixemul.lib assign ixinclude: to the directory
containing the ixemul-includes.
4. Add vbccm68k://bin, vbccm68k:bin and vbccppc:bin to your path.
5. set the stack to a reasonable value (perhaps some 10k).
If you use vbcc frequently it is probably a good idea to add those
commands to your user-startup, shell-startup or similar.
However if you just want to try it out the sample script init_vbcc in
the subdirectory machines/amiga68k does all this for you.
You have to cd in its directory and start it from there, e.g.:
cd myhd:vbcc/machines/amiga68k
init_vbcc
Now you should be able to use vbcc. E.g. if you want to compile and
link the program hello.c you can type
vc hello.c
This will compile and link the file hello.c and create the executable
a.out in the current directory.
vc hello.c -o hello
will do the same, but the created executable will be called hello.
vc -c t1.c t2.c
will compile t1.c and t2.c without linking, creating the object files
t1.o and t2.o.
vc t1.o t2.o -o tt
will link them together and create the executable tt.
If your program uses floating point add -lmieee to the commandline
to link with the math-library, e.g.:
vc calc.c -o calc -lmieee
There is also an extra.lib which includes a few functions that are
no standard ANSI functions but some people seem to regard them as
standard functions. If you use one of these add -lextra to the
commandline and read:
vbcc/machines/amiga68k/doc/extralib.doc
For further information read the files:
vbcc/doc/vbcc.doc
vbcc/doc/vc.doc
vbcc/doc/vbccm68k.doc
vbcc/machines/amiga68k/doc/vclib.doc
PPC-SUPPORT
If you want to generate PPC-code, all you have to do is to add +ppc
to your command-line.
vc +ppc hello.c -o hello
will create the ELF-executable called hello. To execute it, type
ppcrun hello
If a PPC-program expects arguments attach them:
ppcrun hello 1 2 "test 3"
Options specific to the 68k can of course not be used for PPC. See
doc/vbccppc.doc and machines/amigappc/doc/* for further information.
CAUTION: Note that if you write programs using AmigaOS-functions you
have to specify -amiga-align! You might want to add it to
vbcc:ppc if you usually use AmigaOS-functions.
Note that PPC-support should be considered beta and there is room
for many improvements.
CONFIGURATION
The frontend searches for a file vc.config in ENV: and vbcc: to read
preferences. The provided sample vc.config should be usable and does
not have to be changed but you can add something to suit your personal
preferences - read
vbcc/doc/vc.doc
to find out more.
If you have the OS-includes and do not want to add them to the vinclude:
assign mentioned above you can also modify the vc.config file:
Add -I<full_path> directly after the two occurences of -Ivinclude*: in
the sample vc.config, e.g.:
-pp=vcpp -Ivincludem68k: -Imyhd:os-include -D__STDC__=1 %s %s %s
-ppv=vcpp -Ivincludem68k: -Imyhd/os-include -D__STDC__=1 %s %s %s
MESSAGE BROWSER
If you start the message browser with
run vbrowse
it wi