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From: "Ekkehard Morgenstern" <ekkehard.morgenstern@onlinehome.de>
Newsgroups: comp.lang.ada
Subject: Re: [announcement] SYSAPI and SYSSVC for Windows
Date: Mon, 22 Dec 2003 17:35:15 +0100
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I wrote:
> As I understand the GCC bootstrapping phase, I will have to write
> a minimal C compiler that conforms to some rules, and then I can
> compile with it the first stage of GCC, and with that the second,
> and so on. And then I just need to recompile the GNU libraries
> and the GNAT compiler.

I just downloaded the source for GCC 3.3.2, and yes, the bootstrap
compiler needs a minimal C compiler (K&R compatible), and the
standard C libraries, plus a make tool, a Korn shell or similar
(for the configure script and other scripts), the Ada compiler
requires GNAT for compilation, which has thus also be bootstrapped,
and so on. So I basically have to write a minimum UNIX-compatible
environment to compile GCC and GNAT, if I want to port it to a new
platform (virtual machine).

By then I wouldn't need it anymore, since I would already have an
Ada compiler (because I want to write my virtual machine in Ada).

However, I would port GCC as part of the developent environment
for the user, if my Ada compiler wouldn't be sufficient for 
public usage. I plan to provide a POSIX environment anyway, so
that could be used then to run GCC and the like.

If GCC, or at least the bootstrap part was written in BCPL,
porting it would be far easier! Then I'd just need an INTCODE
interpreter for my platform and bam I could run it.