[fpc-devel] Questions regarding m68k-atari target

[Sven Barth]

Thorsten Otto via fpc-devel <fpc-devel at lists.freepascal.org> schrieb am
Di., 25. Jan. 2022, 13:03:

> On Dienstag, 25. Januar 2022 12:22:33 CET Karoly Balogh wrote:
>
> > Hi,
>
> >
>
> > On Tue, 25 Jan 2022, Thorsten Otto via fpc-devel wrote:
>
> > > Yes, a.out support (which is used on Atari) has been dropped in 2.31.
>
> > > But i've added it back in, and cross-binutils of 2.34 can be found at
>
> > > http://tho-otto.de/crossmint.php#binutils
>
> >
>
> > Won't really help. As you found out already, section smartlinking won't
>
> > work with a.out. It never worked in any version of binutils on any
>
> > platform. Actually I went the vasm/vlink route, because the AS/LD
> versions
>
> > I found online at the time I worked on the port, crashed hard on me on
>
> > EmuTOS/Hatari, and vasm/vlink just worked. Plus the vasm/vlink combo
>
> > supported section-based smartlinking. This is something actually I
>
> > requested from Frank Wille to be added to vlink, and he was nice enough
> to
>
> > add it for us. It's used on Amiga, Atari, and the Sinclair QL. Just for
>
> > reference without some kind of smartlinking, we'd end up having a
> 300K-ish
>
> > hello world... Instead of 25K-ish... So yeah.
>
> >
>
> > (We do support individual .o/.a based smartlinking too, that should work
>
> > for Atari as well, but you'll literally end up growing roots, it's so
>
> > slow, I promise. So it just wasn't practical...)
>
> >
>
> > > That does not mean that the section based linking will work. I'll have
>
> > > to check whether that can somehow be supported.
>
> >
>
> > I based on my experience with customized binutils, recommend against
>
> > fighting with this. I'd much rather just generate an ELF binary, where
> all
>
> > the shiny features are available and tested, then convert it with some
>
> > tool to a native binary for the target. Actually we have several
> platforms
>
> > which do this or something similar already. If I'm not mistaken, GCC for
>
> > Atari used to have some tool like this? Brownout, maybe?
>
> >
>
> > > Yes, but when i use gas, i think fpc won't generate the required
> section
>
> > > directives?
>
> >
>
> > This is intentional. FPC knows that GAS for Atari uses a.out (or used at
>
> > the time, when I wired this together), and avoids generation sections,
>
> > because they just didn't work (they didn't even compile back then).
>
> >
>
> > Anyway, all of this is 2017-18 wisdom, or so. I haven't looked into your
>
> > updated binutils yet, so feel free to correct me regarding it, if
>
> > something which hasn't been supported before now is. :)
>
> >
>
> > Cheers,
>
> > --
>
> > Charlie
>

Can it be that you forgot to write some reply here, Thorsten?

Regards,
Sven

>
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