Well, then the gfan.log that you shared cannot possibly come from the same install as the config.log that you shared. Can you run "./sage -f gfan" again?
>From your log: Building gfan-0.6.2.p1 g++ -O2 -g -march=native -DNOCDDPREFIX -DGMPRATIONAL -Wuninitialized -fno-omit-frame-pointer -O2 -g -c src/polynomialgcd.cpp -o src/polynomialgcd.o It should say: Building gfan-0.6.2.p1 g++ -std=gnu++11 -O2 -g -march=native -DNOCDDPREFIX -DGMPRATIONAL -Wuninitialized -fno-omit-frame-pointer -O2 -g -c src/polynomialgcd.cpp -o src/polynomialgcd.o On Monday, August 30, 2021 at 11:21:58 AM UTC-7 Simon King wrote: > Hi Matthias, > > On 2021-08-30, Matthias Köppe <matthia...@gmail.com> wrote: > > ./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.) > > In a shell: > king@klap:~/Sage/git/sage$ echo $CC > > king@klap:~/Sage/git/sage$ echo $CXX > > So, it is not set. > In a Sage shell: > (sage-sh) king@klap:sage$ echo $CC > gcc > (sage-sh) king@klap:sage$ echo $CXX > g++ -std=gnu++11 > > This is what it should be, right? > > Best regards, > Simon > > > > 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/c7d10469-db0c-439a-a415-c697aae5e5a0n%40googlegroups.com.
