porting/recompiling GNAT run time library

porting/recompiling GNAT run time library

[Francisco Javier Loma Daza]

I plan to make a gnat cross compiler to amateur os. I am using
gnat3.14p, and I have tried to use the No_Run_Time pragma,  -nostdinc
and -nostdlib, but my simple program (null body) seems to need some
gnat files, as ada.ads and gnat.ads system.ads, and so on .... one
file that hurts is system.stack_checking because it needs to do a
getenv ....

  Have someone make a minimal custom run time library for use with
gnat No_Run_Time pragma?

Thanks.

Re: porting/recompiling GNAT run time library

[sk]

fjloma@andaluciajunta.es:
 > Have someone make a minimal custom run time library for use with
 > gnat No_Run_Time pragma?

No runtime, but a standalone "pragma No_Run_Time" ELF booting from
GRUB with no GNAT dependencies.

www.ktc.com/~sknipe/EOSA-BOOT-0.0.11-beta.2.tar.bz2
www.ktc.com/~sknipe/EOSA-BOOT-0.0.11-beta.2.tar.gz

Directly download one of the above and ignore the web
page, it is not current.

-- 
-------------------------------------------------
-- Merge vertically for real address
--
--     s n p @ t . o
--      k i e k c c m
-------------------------------------------------

Re: porting/recompiling GNAT run time library

[Jeff]

Create a "gnat.adc" that contains:

pragma No_Run_Time;
pragma Restrictions(No_Exceptions);

This has worked for me in the past.

-- Jeff

sk <noname@myob.com> wrote in message news:<mailman.17.1062134393.318.comp.lang.ada@ada.eu.org>...
> fjloma@andaluciajunta.es:
>  > Have someone make a minimal custom run time library for use with
>  > gnat No_Run_Time pragma?
> 
> No runtime, but a standalone "pragma No_Run_Time" ELF booting from
> GRUB with no GNAT dependencies.
> 
> www.ktc.com/~sknipe/EOSA-BOOT-0.0.11-beta.2.tar.bz2
> www.ktc.com/~sknipe/EOSA-BOOT-0.0.11-beta.2.tar.gz
> 
> Directly download one of the above and ignore the web
> page, it is not current.
> 
> -- 
> -------------------------------------------------
> -- Merge vertically for real address

Re: porting/recompiling GNAT run time library

[Francisco Javier Loma Daza]

jeff.huter@bigfoot.com (Jeff) wrote in message news:<fe4bb2c2.0308290514.390b06ee@posting.google.com>...
> Create a "gnat.adc" that contains:
> 
> pragma No_Run_Time;
> pragma Restrictions(No_Exceptions);
> 
> This has worked for me in the past.
> 
> -- Jeff
> 

And it works indeed ... but with that restrictions. I admit to have no
tasking, but I would like to have exceptions, string concatenations
... what gnat files are needed to tweak for doing that? ( I assume
that first I must provide some sort of dynamic memory
allocation/dealocation )

Thanks

Re: porting/recompiling GNAT run time library

[Francisco Javier Loma Daza]

sk <noname@myob.com> wrote in message news:<mailman.17.1062134393.318.comp.lang.ada@ada.eu.org>...
> fjloma@andaluciajunta.es:
>  > Have someone make a minimal custom run time library for use with
>  > gnat No_Run_Time pragma?
> 
> No runtime, but a standalone "pragma No_Run_Time" ELF booting from
> GRUB with no GNAT dependencies.
> 
> www.ktc.com/~sknipe/EOSA-BOOT-0.0.11-beta.2.tar.bz2
> www.ktc.com/~sknipe/EOSA-BOOT-0.0.11-beta.2.tar.gz
> 
> Directly download one of the above and ignore the web
> page, it is not current.
> 
> -- 
> -------------------------------------------------
> -- Merge vertically for real address

  Thanks, great job!!