understanding runtime support

[Patrick <patrick@spellingbeewinnars.org>]

I've been studying Ada for about 6 months now and I am managing on the desktop. I wanted to start a new embedded project. I had assumed that full Ada would be supported on all the targets GCC is capable of targeting, now I am not so sure.

It's my understanding that with a C program, main must be called main because the compiler is depending on this name to create an entry point and that the compiler can insert ASM code to bootstrap an embedded C program. I am also assuming that gcc inserts a runtime for c and is capable of inserting for all the supported targets.

What is the situation with Ada? I was hoping to target various M68K related architectures, ARM and AVR.

I read a recent thread about "Tasking on GNATAVR" and it does not look like there is an officially supported avr runtime. I haven't found anything in the open source world on M68K support. It looks like Gnat Pro supports ARM but does the GPL version support it?

I am pretty mixed up, please help me find the resources to figure out what is supported-Patrick