gnat/rtems?

[Joel Sherrill]

DuckE wrote:
> 
> I have beem trying (unsuccessfully) to do the same build, but have gotten
> farther.
> I am trying to build on red hat 6.2.
> I downloaded the gnat RPM's and ran my build with CC=gnatgcc.  I also had to
> modify the bit script included with RTEMS somewhere where gcc was hard
> coded.

When we build locally, we take the official ACT binary release, build
a native gnat using it, install that into a non-standard location that
does not conflict with the native compiler (such as /usrN/gnat-VERSION),
and put the newly built gnat native compiler at the head of our path.
 
I am not surprised that the script had a problem using the RPMs. Please
submit a patch.

> I got to the point that I had a segment violation during the build.

Are you still using a m68k/cpu32?  I recall that there were problems
building that with gcc 2.8.1 with gnat.  

Even if you get it to compile, the m68k BSPs assume ELF and there is
no m68k-elf embedded support in gcc 2.8.1.  m68k-rtems is coff in
gcc 2.8.1.  You will have to merge the m68k-elf support to be able
to use the current m68k BSPs unmodified.

[NOTE: Remember gcc 2.8.1 did not have extensive support for
ELF on embedded targets.  RTEMS targets on gcc 2.95.2 are
mostly ELF based now.  This causes problems when building
late model RTEMS with gcc 2.8.1 which is required for gnat.] 
 
> SteveD
> 
> ----- Original Message -----
> From: "Daniel Lange" <lange92 at iscssun.uni.edu>
> To: <chat at gnat.COM>
> Cc: <crossgcc at cygnus.COM>; <rtems-users at oarcorp.com>
> Sent: Sunday, July 30, 2000 2:56 PM
> Subject: gnat/rtems?
> 
> > Has anyone ever gotten gnat/rtems to compile? I followed the instructions
> > on www.oarcorp.com to the letter, downloading all the files (finding
> > gcc-2.81 was next to impossible) and decompressing all the files and
> > applying patches, etc. However, it looks like the page I was following was
> > written for setting up the C version of rtems, because it has certain
> > obvious errors...
> >
> >
> http://www.oarcorp.com/rtems/betas/rtems-4.5.0-beta/online-docs/rtemsdoc-4.5
> -beta3/share/rtemsdoc/html/started_ada/started_ada00015.html
> > has no download site for gnat... I ended up searching for it with google.
> >
> > And the files on OARcorp's site aren't where they are supposed to be, I
> > had to poke around in their ftp server to find the right files...
> >
> > and the only place I could find gcc-2.8.1 (it's old now, 2.9.5 is out) was
> > on metalab.unc.edu.
> >
> > I could be mistaken on this one, but I run a Debian linux system, and gcc
> > won't compile ada files, and doesn't recognize the -gnata and -gnatpg
> > options. I copied the ada directory and did the patch to gcc, and that
> > kept failing with an "Warning: Ada compiler not installed on this system."
> > so I hacked the Makefile and set CC= gnatmake, that generated the proper
> > .o files, but bombed out with a constraint error on types.adb.
> >
> > I was attempting to use rtems-4.5.0-beta3a.tgz to build, but really I
> > don't think the compile ever got that far...
> >
> > can anyone tell me what I did wrong?
> >
> > Daniel Lange
> >
> >

-- 
Joel Sherrill, Ph.D.             Director of Research & Development
joel at OARcorp.com                 On-Line Applications Research
Ask me about RTEMS: a free RTOS  Huntsville AL 35805
   Support Available             (256) 722-9985