[Bug c++/42814] gcc segfaults on gch

["rguenth at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #12 from rguenth at gcc dot gnu dot org  2010-01-20 21:09 -------
(In reply to comment #11)
> Subject: Re:  gcc segfaults on gch
> 
> so I am thinking about a way to wrap the existing templates that I use.
> there must be a way to reduce the size of the gch by specifing a list
> of classes we use. that would reduce the build size.
> 
> this boost lib takes forever to process.
> We only use %1 of it at a time. There has got to be a way to
> precompile all these templates. A nice fine grained, for each header,
> external pch database for stl and boost would make working with them
> fun again.
> 
> I have been experimenting with grouping the headers into groups of
> common dependencies. Basically I made a type level dependency tree
> that is sliced up into pools of common types and topologically sorted
> so that we can compile the the gch files in the right order and
> include the previous gch.

You can at most include a single gch file.

> I would consider putting some time into helping make the gch better if
> you give me direction.

I think the issue is the following enum:

  template<class _Sp, class _Tp>
    struct __traitor
    {
      enum { __value = bool(_Sp::__value) || bool(_Tp::__value) };


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42814