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From: Simon Wright <simon@pushface.org>
Newsgroups: comp.lang.ada
Subject: Re: GNAT Installation Problems
Date: Sat, 03 Oct 2015 08:58:00 +0100
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Date: 2015-10-03T08:58:00+01:00
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csampson@inetworld.net (Charles H. Sampson) writes:

> After rebooting the machine, as instructed, I executed
>
>      codesign -f -a GDB /Ada/GNAT/bin/gdb
>
> and was rewarded with the error message
>
>      GDB: unknown architecture name

That should have been -s GDB not -a (which specifies an architecture,
hence the message).

> Finally, trying to get a handle on where I stand, I executed (in a
> terminal window)
>
>      gnatmake -g generate.adb
>
> which gave me the message
>
>      Illegal instruction: 4
>
> Any ideas? The last message makes me think that my MacBook has only a
> 32-bit bus and it's trying to execute an instruction unique to 64-bit
> machines. I've poked around System Profiler and see nothing about bus
> width.

Much more likely to be some sort of path problem; all Intel Macs have
been 64-bits.

What does "gcc -v" say? "gnatmake -v"? "gnatls -v"?

Do you have DYLD_LIBRARY_PATH set?