[PATCH] [libc++] Support newlib as libc++'s C library [locale part]

[Jonathan Roelofs]

================
Comment at: include/support/newlib/xlocale.h:27
@@ +26,3 @@
+// duck under that velvet rope.
+int isascii(int c);
+
----------------
jfb wrote:
> jroelofs wrote:
> > jfb wrote:
> > > `isascii` ins't in C++11 either :-)
> > > 
> > > Should libc++ not use it at all, or use a special `__isascii`?
> > Not using it would mean lots of ugly newlib specific stuff in locale.cpp and __locale. Sounds like `inline int __isascii(int c) { int isascii(int); return isascii(c); }` is the way to go here.
> Would you just leave __isascii in this header? Or fix the rest of libc++ and move it to a global header? That'll be tricky because at least glibc has `#define __isascii(c)`.
Oh. Yucky. __libcpp_isascii it is then....

http://reviews.llvm.org/D5385