included file in std_algorithm.h

[Benjamin Kosnik]

> #include <bits/c++config.h>
> 
> However, the only file in bits which comes close is
> c++config [nb:  no .h].  I suppose that shows the
> importance of _that_ header file.

Constructed at build time. See include/Makefile.am.

If you do any work with headers, you must understand the configure and build 
procedure. It's crucial, as configure options change what is built.

> BTW, I am working on updating the whole libstdc++
> in both programming style and the use of #includes
> which someone mentioned should only be in the
> standard library files.

Uh. You might want to outline your proposed effort before going too far 
down this path.

> One other question, why are the files referred to
> by <cxxxxxx> in one (or is it two) separate directories
> from the other <xxxxxxx> C++ standard headers?
> What differentiates c_std from c_shadow?  I think it
> might be wise as a hint to put the carry-over, non-
> namespace C headers in include/deprecated, any thoughts?

May I suggest reading the README, as well as the other documentation? 

-benjamin