[Bug c++/69763] _Alignof(double) in C gives different results from alignof(double) in C++

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69763

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69560#c11