[Bug preprocessor/56686] gcc cannot find include header file

[panruochen at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56686

--- Comment #4 from Pan Ruochen <panruochen at gmail dot com> 2013-03-25 03:21:34 UTC ---
I find something interesting:

With -I.  option, gcc works well.
With -I./ option, gcc fails.

gcc -v says:
ignoring nonexistent directory "./"

But even on Windows, both "." and "./" stand for "current directory", don't
they?