On Fri, Nov 22, 2019 at 11:36:18PM +0100, Jakub Jelinek wrote: > On Fri, Nov 22, 2019 at 04:01:43PM -0600, Segher Boessenkool wrote: > > On Fri, Nov 22, 2019 at 09:02:05PM +0000, Andrew Dean wrote: > > > > > Many systems do not have a system compiler newer than this *four years > > > > > old* one. GCC 4.8 is the first GCC version that supports all of > > > > > C++11, which is the only reason it would be even near acceptable to > > > > > require something this *new*. > > > > > > > > Agreed. Note we're even shipping new service packs for SLE12 which has > > > > that > > > > "ancient" compiler version (OTOH there _is_ a fully supported GCC 9 > > > > available > > > > for SLE12 as well). > > > > > > > > So, if we want C++11 then fine. But requiring GCC 9+ isn't going to > > > > fly. IIRC > > > > GCC 6 is first having -std=c++14 by default, but unless there's a > > > > compelling > > > > reason to use C++14 in GCC I'd rather not do it at this point. > > > > > > > > Removing all the workarounds in the tree we have for GCC 4.[12].x would > > > > of > > > > course be nice. > > > > > > > > But I have to update the testers that still use GCC 4.1.x as host > > > > compiler :P > > > > > Richard/Segher: Are we in agreement that we can move forward with > > > updating to c++11 as the minimum version? I have made the simple change > > > locally to modify the flag and verified that I got the exact same test > > > results with/without the change. I can look into the work to add a > > > configuration warning if the compiler doesn't support c++11, but wanted > > > to make sure we are on the same page before doing so. > > > > If GCC 4.8.5 works as bootstrap compiler, it is fine with me, and good > > progress too. (Which means 4.8.5 has to work for at least all primary > > targets.) > > What would be the advantage of bumping the requirement now as opposed to at > the start of next stage 1 though? We should be fixing bugs now, not > introduce new features nor do code refactoring.
Oh, I meant for GCC 11, of course. I thought we all agreed on that. Segher
