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From: Simon Wright <simon@pushface.org>
Newsgroups: comp.lang.ada
Subject: Re: Inspirels Ada on cortex tutorial linker issue
Date: Sat, 23 Jul 2016 07:57:22 +0100
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Date: 2016-07-23T07:57:22+01:00
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Devin <devin.inspiredby@gmail.com> writes:

> I am trying to get my environment setup, and I am using an Orange pi
> pc running armbian as the OS.  It is an arm based single board
> computer, so I should be able to use the compiler and linker tools
> natively, at least that is what I am understanding from the chapter of
> the tutorial.
>
> I am able to compile the program from the "First Program" chapter of
> the tutorial without errors, but when I attempt to link the program I
> get an error reading:
>
> program.o:(.ARM.exidx+0x0): undefined reference to '__aeabi_unwind_cpp_pr0'

That's to do with exception handling. It seems that your armbian
compiler has inserted exception handling code that's not inserted by the
raspbian compiler. I'd expect some trace of this in the program.s file
described in the tutorial.

When I compile (using -S to generate program.s) with an arm-eabi
cross-compiler on this Mac, I get something that's almost the same as
the tutorial. When I compile with the native compiler, aside from the
obvious difference that it's x86_64 code, there is exception handling
code in there.

It's possible that this is because of different configuration options in
system.ads. Before we go too far down that route, can anyone report on
experience using raspbian/armbian?