[Bug preprocessor/47823] #pragma once not documented

[pinskia at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47823

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> 2011-02-20 20:40:03 UTC ---
At one point it was documented in the C preprocessor manual but it is no longer
documented there.