GLIBCXX_CROSSCONFIG with newlib targets

[Ben Elliston]

> > If the target also uses newlib (and one configures with
> > --with-newlib), then the GLIBCXX_CROSSCONFIG macro is bypassed.  Is
> > there some other way to hardwire target parameters in a cross
> > environment that I haven't noticed?
> 
> If the target uses newlib, what parts of crossconfig.m4 do you need?

Well, in particular, setting SECTION_FLAGS.

Ben