[Bug c++/122428] Missing nocf_check attribute diagnostic

[hjl.tools at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=122428

--- Comment #3 from H.J. Lu <hjl.tools at gmail dot com> ---
Apparently, it is done on purpose to allow

extern void foo (void) __attribute__((nocf_check));
extern void foo (void);

as shown by

g++.dg/tm/pr46270.C
g++.dg/tm/pr46567.C
g++.dg/tm/pr47340.C
g++.dg/tm/unsafe2.C

where __attribute__((transaction_safe)) is used, instead of
__attribute__((nocf_check)).