[Bug libstdc++/64798] [5 regression] g++.old-deja/g++.eh/badalloc1.C FAILs

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64798

--- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
__BIGGEST_ALIGNMENT__ has nothing to do with alignment of malloc returned
memory.
The union I've mentioned is a reasonable guess (something actually mandated by
the standard), glibc right now guarantees 2 * sizeof (void *) (which is wrong
for ppc32).  For malloc alignment, we've added an attribute for that, but glibc
maintainers haven't added it to their headers :( and obviously other libcs
neither.