On Thu, May 14, 2020 at 05:05:59PM -0400, Jason Merrill via Gcc-patches wrote:
> +Versions of GCC prior to 11 also allow bootstrapping with an ISO C++98
> +compiler, versions of GCC prior to 4.8 also allow bootstrapping with a
> +ISO C89 compiler, and versions of GCC prior to 3.4 also allow
> +bootstrapping with a traditional (K&R) C compiler.
>
> To build all languages in a cross-compiler or other configuration where
> 3-stage bootstrap is not performed, you need to start with an existing
> -GCC binary (version 3.4 or later) because source code for language
> +GCC binary (version 4.8 or later) because source code for language
> frontends other than C might use GCC extensions.
>
> Note that to bootstrap GCC with versions of GCC earlier than 3.4, you
Probably this paragraph needs adjustments too.
Jakub
