[LLVMdev] Disabling rtti on default build - could it be reverted/re-enabled?

[Jeffrey Yasskin]

On Fri, Feb 26, 2010 at 11:04 AM, Nick Lewycky <nicholas at mxc.ca> wrote:
> Pekka Jääskeläinen wrote:
>>
>> Jeffrey Yasskin wrote:
>>>
>>> I've put together http://llvm.org/docs/Packaging.html to document
>>> these kinds of requests for all packagers in one place. Let me know if
>>> any of the advice I've put there is wrong. (At the moment,
>>
>> Looks good to me. BTW exception support for LLVM is not required
>> to link with code that uses exceptions. At least our toolset
>> seems to link fine with LLVM without this flag given for make and
>> it uses exceptions all over the place. So probably it's not required
>> to be on for the binary packages either (not sure about this).
>
> The reason we can't turn RTTI off for VMCore right now is that it breaks the
> build on Mac of tools/bugpoint which uses RTTI (because it uses exceptions).
> Your ABI may vary.

That's RTTI, not exceptions. If both had RTTI on, but bugpoint used
exceptions and VMCore didn't, Pekka's saying it would still link
(which seems, actually, to be the current state of the world). I'll
remove the REQUIRES_EH item.