[Bug preprocessor/58887] Allow recursion in variadic macros?

[joseph at codesourcery dot com]

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.)