[Bug preprocessor/47756] Warning for #include " " instead of < >

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47756

--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
The C++ standard has a note saying:

   in general programmers should use the < > form for headers provided with
   the implementation, and the " " form for sources outside the control of
   the implementation.

which your warning would contradict, unless you only suggest it applies to
standard headers that are part of the implementation (i.e. GCC and libc)