https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100057
--- Comment #6 from JeanHeyd Meneide <phdofthehouse at gmail dot com> --- Oh, woops, my bad. This is for configuring and building GCC. I'm not sure which option turns on -ffreestanding for building the compiler itself! But it seems like that's missing, if __STDC_HOSTED__ is not 0.
