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GNAT/RTEMS & floating point
- Date: Mon, 15 Feb 1999 09:11:14 -0600 (CST)
- From: joel at OARcorp.com (joel at OARcorp.com)
- Subject: GNAT/RTEMS & floating point
On Mon, 15 Feb 1999, Jiri Gaisler wrote:
> joel at OARcorp.com wrote:
> > On Thu, 11 Feb 1999, Tony R. Ambardar wrote:
> > > I've built GNAT/RTEMS (both gnat-3.10p and gnat-3.11p) for my i386-based
> > > board, and one of the Ada programs I tried was the dining philosophers
> > > example that comes with GNAT, diners.adb et al. Unfortunately, it hangs my
> > > system in the middle of running.
> This seems to be a bsp related problem - on sparc/erc32 diners.adb work
> fine with gnat-3.11p/rtems-4.0.0/newlib-1.8.1 (although it fails with
There is no software FP emulation for the i386.
> > Based on my tests 3.11p should not have been that difficult to build. The
> > gnat gdb patch breaks building the rtems targets.
> It is the treads support in gdb which is broken for rtems, linking fails
> due to an unresolved reference to a function (forgot which one). The fix
> is simple - define the missing function somewhere and let it always
> return zero.
If you see a better way to fix this problem, I would appreciate it. I
have done the same fix myself. The ifdef's in ada-tasks.c are IMO
horribly incorrect. It looks like VXWORKS_TARGET is a hack to avoid
building native when the target is vxworks. There is no attempt in this
code or the configure.in to deal with real cross issues. I was hoping for
a -DCROSS_COMPILER like in gcc and then do something clean. Suggestions
Joel Sherrill Director of Research & Development
joel at OARcorp.com On-Line Applications Research
Ask me about RTEMS: a free RTOS Huntsville AL 35805
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