libstdc++v3 as a drop-in replacement to libstdc++v2

[Benjamin Kosnik]

> | Subject pretty much says it all. I want to make v3 something that can
> | be "dropped" or copied or whatever into the base directory of an egcs
> | release, replacing the current libstdc++ implementation.
> | 
> | Doing this simplifies many xcompile issues.
> | 
> | Doing this means the libio subdir can get ripped out, and the libio
> | subdir that is part of egcs can be used instead.
> 
> and libio.h + libc.a is not enough?

only if you are running on a glibc system. Solaris, for instance, needs 
libio. People running on glibc systems will not have libio rebuilt, 
because it is in libc.a, as you point out.

 > Will I need to have the gcc sources also?

Yes. src/basic_file.cc needs libio.h. I'll see what I can do.

-benjamin