Jeff Law <l...@redhat.com> wrote: > On 10/28/19 2:27 PM, Segher Boessenkool wrote: >> On Mon, Oct 28, 2019 at 01:40:03PM -0600, Jeff Law wrote: >>> On 10/25/19 6:01 PM, Gabriel Dos Reis wrote: >>>> Jason, Jonathan - is the situation on the terrain really that dire that >>>> C++11 (or C++14) isn't at all available for platforms that GCC is >>>> bootstrapped from? >>> The argument that I'd make is that's relatively uncommon (I know, I know >>> AIX) that bootstrapping in those environments may well require first >>> building something like gcc-9. >>> >>> I'd really like to see us move to C++11 or beyond. Sadly, I don't think >>> we have any good mechanism for making this kind of technical decision >>> when there isn't consensus. >> >> Which GCC version will be required to work as bootstrap compiler? Will >> 4.8.5 be enough? > I'd say gcc-9. What would we gain by making it 4.8 or anything else > that old?
We’d have to use something older than 9 on earl(ier) Darwin since 9 will not bootstrap with the system-provided tools. ISTM that using a well-baked stable closed branch would be reasonable? (so 7.5 or earlier, assuming that the decision is made after 7.5 rolls) Iain