[PATCH] Fix Ada bootstrap on darwin

[Mark Mitchell]

Zack Weinberg wrote:
> "John David Anglin" <dave@hiauly1.hia.nrc.ca> writes:
> 
> 
>>Last March, a change was committed to enable linkonce support on
>>Darwin.  Part of this changed reversed the order in make_decl_one_only
>>of the checks for one-only support and common .  I think this change
>>was wrong as it increases the binary size of systems that support
>>common.  Thus, common support should be preferred.
> 
> 
> It's desirable to use linkonce .bss on systems that support both
> linkonce and common, because that way the linkonce section can be put
> into a COMDAT group (if and when we ever get around to implementing
> that *sigh*).

We did implement use of COMDAT groups, at least for use with C++.

-- 
Mark Mitchell
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