Re: PATCHes to help with C++11 bootstrap

[Richard Biener <richard.guenther@gmail.com>]

On May 9, 2015 6:30:49 AM GMT+02:00, Jason Merrill <jason@redhat.com> wrote:
>One C++11 compatibility issue that turns up a lot in the GCC sources is
>
>that in C++98,
>
>#define BAR "bar"
>const char *p = "foo"BAR;
>
>is well-formed, giving p the value "foobar".  But in C++11 this is a 
>user-defined literal with the suffix BAR, which is ill-formed because 
>there is no BAR suffix defined.
>
>-Wc++11-compat didn't warn about this, which I'm fixing with the first 
>patch.
>
>The second patch fixes all the occurrences in GCC.
>
>The third patch fixes the warning to say "-Wc++11-compat" rather than 
>"-Wc++0x-compat".
>
>The fourth patch fixes a few G++ tests that were failing with the 
>compiler defaulting to C++11.
>
>Tested x86_64-cp-linux-gnu, applying to trunk.

Hmm, I wonder if we want to bootstrap with explicit -std=gnu04, our host compiler requirement.  Otherwise we'll silently sneak in C++11 features when that becomes the default?

Richard.