[Bug bootstrap/106482] [12/13 Regression] bootstrap of 12.1.0 using 4.8.2 fails with C++ errors

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106482

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Assignee|unassigned at gcc dot gnu.org      |rguenth at gcc dot gnu.org
             Status|UNCONFIRMED                 |ASSIGNED
           Priority|P3                          |P2
     Ever confirmed|0                           |1
   Last reconfirmed|                            |2022-12-22

--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Daniel Richard G. from comment #2)
> It would be good to have a specific minimum version of GCC in the documented
> prerequisites, as the current text ("an existing GCC binary (version 4.8 or
> later)", albeit referring to non-bootstrap builds) misses edge cases like
> this.

Note the documented requirement for bootstrapping is a "ISO C++11 compiler".
We fail to specifically say which GCC version fulfills this, the GCC 4.8
requirement for non-bootstrap is technically unrelated but it will run into
the same issues I think.

Generally when we refer to a major GCC version picking the latest bugfix
release is always recommended.

I'm posting a proposal to amend the documentation.