[lto] add direct-to-ELF serialization to lto1

[Mark Mitchell]

Tom Tromey wrote:
>>>>>> "Diego" == Diego Novillo <dnovillo@google.com> writes:
> 
> Diego> All of the lang hooks?  I don't think we want to get rid of all
> Diego> of them.
> 
> Yeah, we can't ever get rid of all of them -- we could do it nominally
> but only by reintroducing the same thing under a different name.
> E.g., you need a lang-hook-equivalent to call the FE's parser at all.

Indeed.  We've discussed this multiple times on the lists, but since 
there still seems to be confusion, let's say it again: we only want to 
remove langhooks that affect the semantic interpretation of IL.  The 
middle-end IL should have meaning independent of the source language. 
However, how that IL is generated, or how we format error messages, 
etc., are perfectly reasonable uses of langhooks.

-- 
Mark Mitchell
CodeSourcery
mark@codesourcery.com
(650) 331-3385 x713