[Bug c++/90776] g++ -fms-extensions is inconsistent with Microsoft's compiler

[zhonghao at pku dot org.cn]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90776

--- Comment #1 from zhonghao at pku dot org.cn ---
Another code sample:

typedef union __declspec(align(64)) foo_t {
 double a[8];
} foo_t;

foo_t bar;