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

[olafvdspek at gmail dot com]

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

--- Comment #6 from Olaf van der Spek <olafvdspek at gmail dot com> ---
Hi Jonathan,

The difference between < > and " " is implementation defined. AFAIK GCC only
searches the include path with < > and first searches relative to the current
file with " ". So the standard can't offer better guidance.

Let's consider GCC on Linux. Do you use < > only for standard C / C++ headers
or do you also use it for for example zlib and other platform provided headers?
What do major coding styles say?