[Bug preprocessor/42407] Detect non-unique header file names.

[d dot g dot gorbachev at gmail dot com]

------- Comment #3 from d dot g dot gorbachev at gmail dot com  2009-12-19 01:20 -------
I guess this option should have a few warning levels. For example,
-Wcovered-headers (or -Wcovered-headers=1, which is the same) will not warn
about fixed and GCC's private include files.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42407