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Newsgroups: comp.lang.ada
Date: Sat, 23 Jul 2016 00:34:09 -0700 (PDT)
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Subject: Re: Inspirels Ada on cortex tutorial linker issue
From: Devin <devin.inspiredby@gmail.com>
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Xref: news.eternal-september.org comp.lang.ada:31133
Date: 2016-07-23T00:34:09-07:00
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On Saturday, July 23, 2016 at 2:57:22 AM UTC-4, Simon Wright wrote:
> Devin 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?

Thanks for the info.  After looking closer, there are definitely differences in the output of my program.s file, so I think you may be on to something there.