Re: C compiler, assembler and linker

[mjn3@codepoet.org (Manuel Novoa III)]

Hi Riley,

On Mon, Jul 15, 2002 at 07:07:27AM +0100, Riley Williams wrote:
> > I don't know about small C, but I managed to get bcc to build itself
> > for elks by omitting all the floating point related code. The pre-
> > processor appears to work, but the code generator dies. I haven't
> > had time to track down the problem(s).
> 
> Could you perhaps advise re the tweaks you have done so far? That way,
> we can add a few more brain cells working on sorting the problem out...

Hopefully I'll have time this evening to sort out a patch to post.
I found that dev86-0.16.3 has a number of build issues, so I had to
modify some of the makefiles, etc. as well.

Anyway, here's a list of my bcc tweaks (as best I recall):

1) #elif support.
2) #warning support (at least for non-continued lines).
3) Support asm() at file scope.  This is to allow the equivalent
   of #asm/#endasm in macros.
4) Limited support for things like "#define stdio stdio".  Stock bcc
   goes into an infinite loop when encounting this.  The implementation
   has flaws, but it does what I needed.  You see this a lot in the
   glibc headers we're using with uClibc (yes I'm working on a port).
5) Improved condition wrapping of the floating point related code in
   the bcc source (working towards building bcc for elks).  As I said,
   the code generator dies... at least using elksemu.

Manuel