./configure correctly determines that it needs to use CXX='g++ -std=gnu++11' to work with this old compiler. Check if you have environment variables CC or CXX set in your global environment -- they should be unset; otherwise, they will override the values determined by ./configure. (This is nonstandard behavior of our build system.)
On Sunday, August 29, 2021 at 3:04:34 PM UTC-7 Simon King wrote: > Hi Matthias, > > the two logs are at https://users.fmi.uni-jena.de/~king/logs/ > > Best regards, > Simon > > On 2021-08-29, Matthias Köppe <matthia...@gmail.com> wrote: > > Singular vendors a part of gfan called gfanlib. Perhaps an installation > of > > that is leaking into your build. > > > > If you can share your top-level config.log and the full gfan build log, > we > > can take a closer look. > > > > On Sunday, August 29, 2021 at 11:50:32 AM UTC-7 Simon King wrote: > > > >> Hi Matthias, > >> > >> On 2021-08-29, Matthias Köppe <matthia...@gmail.com> wrote: > >> > On Sunday, August 29, 2021 at 5:44:33 AM UTC-7 Dima Pasechnik wrote: > >> > > >> >> is gfan partially taken from the system? > >> >> > >> >> probably. Ubuntu 16.04 has gfan version 0.5, but Sage needs 0.6.2. > >> >> A system-wide install of old gfan might get in the way. > >> > > >> > No, that alone cannot explain it -- we test this configuration. > >> > ubuntu-xenial-standard installs the system gfan, then rejects it, > then > >> > correctly builds gfan. > >> > >> What could explain it? Is there a typical application that I might have > >> installed and depends on gfan? I mean, it is for Groebner fans. So, what > >> *non-mathematical* software would use it? I don't think that I installed > >> a mathematical software after the last successful build of Sage. > >> > >> Should I try to uninstall gfan, re-install it, and try again? And, > >> if that fails, uninstall and NOT re-install, but build Sage and hope > >> that it provides a working gfan? > >> > >> Best regards, > >> Simon > >> > >> > > > > -- You received this message because you are subscribed to the Google Groups "sage-release" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-release+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-release/8f4d89cf-7965-4904-b6f0-ab0cd4736bb5n%40googlegroups.com.
