Re: [HELP] GCC 4.1 branch Ada status on powerpc-darwin?

[Geoff Keating <geoffk at apple dot com>]

On 19/01/2006, at 9:08 AM, Peter O'Gorman wrote:

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> Eric Botcazou wrote:
> |>Yes the workaround is to add -fexceptions or -shared-libgcc to the
> |>command line when linking libgnat but I don't know if that is the  
> correct
> |>fix or some hacking to config/darwin.h is needed.
> |
> |
> | Thanks.  However, that's not sufficient because the tools fail to  
> build too:
>
> I'm adding Geoff Keating to the CC, hoping that he'll both shout at  
> me while
> explaining why this change to darwin.h is broken, and suggest a  
> real fix.

If ADA is going to use exceptions, then it needs to do what G++ does,  
which is pass -shared-libgcc in its driver.

> This change allows gcc to build on powerpc-apple-darwin8.4 with ada.

It's not OK because for forwards binary compatibility the shared  
libgcc must be used for exception handling.

> Peter
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> Index: gcc/config/darwin.h
> ===================================================================
> --- gcc/config/darwin.h	(revision 109965)
> +++ gcc/config/darwin.h	(working copy)
> @@ -324,6 +324,7 @@
>         -lgcc;								   \
>        :%:version-compare(>< 10.3.9 10.5 mmacosx-version-min= - 
> lgcc_s.10.4) \
>         %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_s. 
> 10.5)	   \
> +       %:version-compare(!> 10.3.9 mmacosx-version-min= - 
> lgcc_eh)	   \
>         -lgcc}"
>  			
>  /* We specify crt0.o as -lcrt0.o so that ld will search the  
> library path.  */

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