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From: Simon Wright <simon@pushface.org>
Newsgroups: comp.lang.ada
Subject: Re: problems with gnat on yosemite macox
Date: Sun, 19 Oct 2014 14:55:13 +0100
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Date: 2014-10-19T14:55:13+01:00
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Leo Brewin <leo.brewin@internode.on.net> writes:

> I just tried compiling my Hello World code using your
> gcc-4.9.1-yosemite version and I still get problems. The good news is
> that the 13.4 vs. 14.0.0 issue is resolved but the linker issue
> remains. Should I be setting some options for the linker?
>
>    which gnatmake
>    /opt/gcc-4.9.1-yosemite/bin/gnatmake
> 	
>    gnatmake lcb01.adb
> 	
>    gnatbind -x lcb01.ali
>    gnatlink lcb01.ali
>    Undefined symbols for architecture x86_64:
>      "__Unwind_Backtrace", referenced from:
>          ___gnat_backtrace in libgnat.a(tracebak.o)
>    ... and more of the same ...
>    ld: symbol(s) not found for architecture x86_64
>    collect2: error: ld returned 1 exit status
>    gnatlink: error when calling /opt/gcc-4.9.1-yosemite/bin/gcc
>    gnatmake: *** link failed.

It works for me.

Could you build with "gnatmake lcb01.adb -largs -Wl,-v" to print the
command line passed to ld?