On 23/02/16 07:15 +0000, Bernd Edlinger wrote:
as described in the PR 69881 it happens quite often that cstddef is called with __need_size_t because we still support gmp-4.3.2 which is installed by contrib/download_prerequisites. This causes a kind of undefined behavior. It is just by chance that this does not cause the gcc-6 boot-strap to fail, but it causes gcc-4.9 bootstrap to fail when the gcc-6 version of cstddef is around. So it looks like a regression, because the new cstddef is more fragile than before.
Is it? cstddef hasn't been changed since 2013-06-11. cstdarg hasn't been changed since 2011-01-30. What made them more fragile?
