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D - Minimal D Cross Compiler

Hi all,

A few students at the University of Pittsburgh have been gathering and coding
up a new operating system.  We've played in C, gotten some bootable code, etc,
but we'd really like to write this all in D (save the asm parts that need to
be done at the low level).  We're trying to target the x86_64 architecture,
but not everyone has 64bit machines (myself included).

We're working on building our cross compiler toolchains BUT we're running in
to problems left and right.  Most of us are on non-windows boxen, (about half
are on macs, the other are running linux).

I've read a few different instructions on how to compile a D cross compiler,
however since we're writing an OS we don't need any of the standard libraries,
just the basics.

Can anyone help walk through the steps of this.  I've been trying to combine
two different methods (the method for just building gcc with an x86_64 target,
and then trying to build D too), and when I finally got a build, just
compiling the following code:

void main() {
  return 1;

The compiler barfed with the following error:

~/bin/x86_64-pc-elf-gdc test.d
<built-in>:0: internal compiler error: Bus error
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.

I have tried to recompile my xcompiler since then and am having no luck (now
I'm getting language glue errors hehe).  I figure rather than keep beating my
head off of the wall I'd just ask if anyone else had done something similar,
or could help out with this!

Thanks much in advance!

Sep 12 2007