[Bug libstdc++/42734] trivial use of std::thread fails with "pure virtual method called"

[paolo.carlini at oracle dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42734

--- Comment #36 from Paolo Carlini <paolo.carlini at oracle dot com> 2010-10-15 23:41:54 UTC ---
(In reply to comment #32)
> Does the front-end disable the HAVE_SYNC_COMPARE_AND_SWAP macros if you compile
> with (implicit or explicit) march=i386 ?

I'm jumping in just in case this point hasn't been clarified already: I added
to the front end the __GCC_HAVE_SYNC_COMPARE_AND_SWAP_* macros, and indeed, are
sensitive to the *actual* command-line options: with -march=i386 are definitely
undefined.