[Simh] Cross-assemblers, cross-compilers: success! (so far)

[Jordi Guillaumes i Pons]

Al 25/07/12 10:16, En/na Jan-Benedict Glaw ha escrit:
 > On Wed, 2012-07-25 00:05:27 +0200, Jordi Guillaumes i Pons 
<jg at jordi.guillaumes.name> wrote:
 > Which exact binutils version did you build? Current version from the 
source code management system? Please tell us where the syntax >error 
is! That's something that can easily be fixed! The binary conversion is 
another thing. It isn't too hard to teach binutils's `objcopy' to >do 
something like that. That's where I would start searching to generate 
some different binary format.

jguillaumes at eeepc2jordi:~$ pdp11-aout-ld --version
GNU ld (GNU Binutils) 2.22

I downloaded the last version from one of the gnu mirror sites. 
Unfortunately, I can't remember which one. The error message I get is 
this one:

jguillaumes at eeepc2jordi:~$ pdp11-aout-ld
pdp11-aout-ld:built in linker script:7: syntax error

It shows even when you invoke the linker without any parameters. I wrote 
a small script to overcome this problem. It seems to work OK beyond this 
issue. I'll have a look at that; I guess it's an easy fix to the linker 
script. And maybe I'll find some time to also bake a simh-papertape 
output bfd. Right now, binutils are building :) MfG, JBG

I thought for a moment about building the backend for BFD, but I have no 
idea about how to do it (I never had to know about BFD nor ld backends 
before :)), so I decided to write an a.out to papertape converter. It 
was really easy, so for someone knowledgeable on BFD/ld it _could_ be 
also easy to make that backend.

Of course, binutils is a widely used package, and the public interest of 
being able to build paper tape images for a simulator of an almost dead 
architecture is... debatable :) Of course, the fun factor already applies :)