[Bug preprocessor/69126] [6 regression] _Pragma does not apply if part of a macro

[manu at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69126

--- Comment #23 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
(In reply to Stephan Bergmann from comment #18)
> (Also, the problem
> only happens with -O or higher.)

That is weird. If you use "GCC diagnostic warning" instead of "ignored", you
should be able to see some changes in locations between -O0 and -O1 and
before/after the bug appeared, don't you?