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PostPosted: Sat Jul 30, 2016 11:29 am 
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I found the source code repositry here, but there was no link to it under the "compilers and languages section". Is anyone here using it?


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PostPosted: Sun Jul 31, 2016 3:19 pm 
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It does seem to be in active development, or at least maintenance - if anyone can say that it's in a working condition I think it would be good to include it in the reference section here.

Edit: note repo is now here:
https://github.com/itszor/gcc-6502
https://github.com/itszor/gcc-6502-bits
Maybe you need this branch
https://github.com/itszor/gcc-6502/tree/m65x-gcc8
or maybe this older one
https://github.com/itszor/gcc-6502/tree/m65x-gcc6-virt

Edit: see also previously
viewtopic.php?f=2&t=2937


Last edited by BigEd on Thu Jun 04, 2020 6:31 am, edited 2 times in total.

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PostPosted: Mon Aug 01, 2016 12:01 pm 
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I found install instructions here, so it looks like its working.


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PostPosted: Mon Aug 01, 2016 3:13 pm 
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I think that's just a mirror... but I do see there's a small 6502 simulator inside the project, which makes it even more interesting!


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PostPosted: Mon Aug 01, 2016 4:59 pm 
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The CRTC demo group use it in their BBC demos, e.g. this one.


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PostPosted: Mon Aug 01, 2016 5:16 pm 
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Ah, thanks, that's the vote of confidence we need! Added the link to Compilers and Languages.


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PostPosted: Tue Aug 02, 2016 11:36 am 
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Wh wh wh .... WHAAAAT ?!?

I tough GCC was not portable to 8-bit systems for technical reasons. I will have to check this out, even if it is in a buggy/alpha stage. On which version of GCC is is based on ? They changed from 4.9 in last year to 6.something this year, and a lot of major changes were made to the project, but I didn't find time to investigate them yet.


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PostPosted: Tue Aug 02, 2016 11:45 am 
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Seems to be 6.0.0 (which is a pleasant surprise - I might have thought it would be ancient)


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PostPosted: Tue Aug 02, 2016 3:38 pm 
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A bit of a struggle, but I've managed to build it!
Quote:
6502-gcc (GCC) 6.0.0 20150516 (experimental)

That's on ubuntu 14.04, 64bit version for x86.

And helloworld.c
Code:
/* Hello World program */
/* from http://groups.engin.umd.umich.edu/CIS/course.des/cis400/c/hworld.html */

#include<stdio.h>

main()
{
    printf("Hello World\n");
}
runs as advertised:
Code:
$ semi65x/semi65x -l 0x200 /tmp/helloworld
Hello World


(Edit: extra steps needed were as follows
- installing flex and cc65
- putting cc65 on the path and also editing the path in a wrapper script
- changing the build script to note ar65's location
- changing the build script to allow multiple builds without a clean start, as I needed to run multiple makes for some reason
)


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PostPosted: Wed Aug 03, 2016 7:32 pm 
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Ok, so I'm downloading it right now, but it's HUUGE (1gb). Also I am worried by the complete lack of any instructions or doccumentaiton whatsoever, and I do not recognize the traditional gcc folders. Where are binutils, cpp, etc... ? Or maybe it just changed a lot since gcc 4.8, last time I compiled it myself.


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PostPosted: Wed Aug 03, 2016 7:36 pm 
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Be sure to get the auxiliary project too. I got this one as a git clone, but gave up with git cloning the main project, as it was quicker to get the zip file.
https://github.com/puppeh/gcc-6502-bits
https://github.com/puppeh/gcc-6502

The instructions are in the auxiliary project.


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PostPosted: Wed Aug 03, 2016 11:37 pm 
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What clib is the GCC tool chain linking too?


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PostPosted: Thu Aug 04, 2016 5:09 am 
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I think this one, in the auxiliary project:
https://github.com/puppeh/gcc-6502-bits ... r/libtinyc


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PostPosted: Thu Aug 04, 2016 12:49 pm 
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So, you are required to have CC65 in order to compile it. How does this make any sense at all ?


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PostPosted: Thu Aug 04, 2016 3:56 pm 
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I don't know exactly what cc65 is used for in the build, but I don't think it's too unexpected. It might be that with some juggling the newly built gcc could be used for whatever it is, but I can vaguely imagine there might be some chicken and egg difficulty. It's already a two-stage bootstrap.


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