[Bug preprocessor/97998] GCC should not complain about double definitions of macros whose names begin with __STDC_

[joseph at codesourcery dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97998

--- Comment #2 from joseph at codesourcery dot com <joseph at codesourcery dot 
com> ---
In bug 91451 I suggested changing this specifically for __STDC_WANT_*.