[Bug c++/110866] No UDC lookup with va_arg

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110866

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
In fact ICC rejects all cases:
<source>(11): error: incorrect use of va_start
        va_start(va, fmt); va.engaged = 1;
        ^

<source>(12): error: incorrect use of va_arg
        va_arg(va, int);
        ^

<source>(14): error: incorrect use of va_copy
                va_copy(va, va);
                ^

<source>(14): error: incorrect use of va_copy
                va_copy(va, va);
                ^

<source>(16): error: incorrect use of va_end
                va_end(va);
                ^