[Bug c/68272] Unwanted out-of-line instances for C inline functions that are also GCC builtins.

[sorganov at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68272

--- Comment #8 from Sergey Organov <sorganov at gmail dot com> ---
That's exactly the problem: why builtins are (implicitly) declared "extern
inline" in C99 compilation mode? It seems logical to rather declare them
"inline" in this mode. 

Overall, even though my own issue is indeed solved by using 
__attribute__((gnu_inline)), this issue still seems to be an unfortunate
inconsistency in GCC.