note: the ABI of passing union with ‘long double’ has changed in GCC 4.4

[Jonathan Grant]

Hello

I know this was useful back when it was added, is it worth revisiting and considering if it could be left out now GCC is on version 16?

To save adding -Wno-psabi, or using pragma around it.

Example:

https://godbolt.org/z/8saefr1a4

<source>: In function 'void f(my_t)':
<source>:9:6: note: the ABI of passing union with 'long double' has changed in GCC 4.4
    9 | void f(my_t my)
      |      ^
Compiler returned: 0

typedef struct
{
    union {
        bool b;
        long double long_d;
    } data;
} my_t;

void f(my_t my)
{
    __builtin_printf("%d", my.data.b);
}


I'm not on this list, may I ask to include my email in replies.

Kind regards
Jonathan