[Bug bootstrap/52226] Trunk fails to bootstrap on Mac OS X.

["manphiz at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52226

--- Comment #8 from Xiyue Deng <manphiz at gmail dot com> 2012-02-13 11:23:05 UTC ---
(In reply to comment #7)
> (In reply to comment #3)
> >     --enable-concept-checks \
> 
> You probably don't want this, some of the concept checks are incompatible with
> C++11, you shouldn't enable them at configure time, you can still use them
> later with -D_GLIBCXX_CONCEPT_CHECKS
> 
> >     --enable-decimal-float \
> >     --enable-fully-dynamic-string \
> >     --enable-libstdcxx-debug \
> >     --enable-libstdcxx-time \
> 
> This implies you want to use C++11, so you probably don't want to permanently
> enable concept checks.
> 
> 
> >     --enable-multilib \
> >     --enable-plugin \
> >     --enable-lto \
> 
> If your build fails it's usually a good idea to try *removing* options to find
> the smallest set that can reproduce the bug, instead you're adding more
> options.
> 
> >     --enable-static \
> >     --enable-shared \
> >     --enable-threads \
> 
> These are redundant, you're explicitly setting default behaviour.
> 
> >     --enable-version-specific-runtime-libs
> 
> This is broken on x86_64 multilib
> 
> I don't think these are the cause of your problem, I just think you'll find it
> easier to identify the real problem if you keep it simple instead of adding
> loads of unnecessary complication.

Thanks for the detailed explanation for these options. I'll tweak with them and
report back.