Re: understanding runtime support

[Lucretia <laguest9000@googlemail.com>]

Having spoken to you on IRC and email about this, I know what you are trying to do. Here are your options:

1) Use an existing OS and build GNAT to target that for your hardware.
2) Use bare metal GNAT - which isn't easy.

As for 1, you have a number of options:

* RTEMS
* MarteOS
* Linux (built for embedded target) + UClibc + GNAT

Each will require some work to target your hardware, as they will require drivers written to access the hardware - you would have to do this yourself anyway for bare metal programming.

Linux has been built for m68k machines, GNAT builds on Linux and would be trivial to add m68k for Linux, even though I remember having GNAT on an Amiga for both Linux and AmigaOS years ago.

If you went bare metal compiler, you would need to define what you needed in the runtime. Do you really need tasking? Do you really need full exception handling? If not, you can just have local exceptions which will call last_chance_handler anytime something goes wrong, in that procedure, you can do whatever you like, drop into remote gdb, dump the regs over serial, etc.

Luke.