http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58887
--- Comment #8 from joseph at codesourcery dot com <joseph at codesourcery dot com> --- (And for recursion, even specification at the level of standard text might leave something to be desired; I'd think specification at the level of X3J11/86-196, the algorithm GCC tries to follow regarding when a macro name generated in macro expansion can itself be expanded, would be desired as well. Not that I think recursion is appropriate to include in GCC's preprocessor unless it's standardized.)
