#include_next and removing of duplicate include dirs

[Gabriel Dos Reis]

Zack Weinberg <zack@codesourcery.com> writes:

| > This is a requirement of the C++ standard, see Annex D, "C" compatibility 
| > headers. 
| 
| Wouldn't it be simpler and easier in the long run to cooperate with
| the C library?

Yes, that was mentionned sometime ago (probably just before we released
gcc-3.0) but there is no concretization yet -- at least if memory
serves me well.

-- Gaby
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