On Sunday, April 3, 2016 at 8:30:41 PM UTC+1, Erik Bray wrote: > > On Sun, Apr 3, 2016 at 4:45 PM, Dima Pasechnik <dim...@gmail.com > <javascript:>> wrote: > > IMHO the pre-reqs needed to build Sage on Linux ought to include > gfortran > > and g++ (why not? listing them won't harm, even if the gcc version is > > blacklisted) > > > > This is becoming an issue - there was a post recently about a failure to > > build Sage on a newish Linux system, with error in building Sage's gcc > using > > a new gcc 5. > > On the contrary, I believe requiring someone to build an entirely > separate compiler toolchain is more burdensome and both user- and > developer-hostile compared to fixing the issue with that compiler > (where possible; I recognize it is not always). >
Well, that's what I meant - our documentation does not spell out details on when one can use the system's default toolchain, and what are the requirements for this. What happens is that sometimes people just did not install system's gfortran and g++, whereas gcc itself is OK, and this results in Sage building its own toolchain, while this could be avoided by installing gfortran and g++. Dima > > Erik > > > On Sunday, April 3, 2016 at 9:42:58 AM UTC+1, Volker Braun wrote: > >> > >> Pretty clear that its a dual abi issue, libfplll discovers your system > >> libqd and decides to link against it. But your system is new enough to > use > >> the new cxx11 abi, whereas the Sage-built gcc is not. Hence linking > fails > >> with undefined std::__cxx11 symbols, as expected. > >> > >> This is probably going to become a big issue for us soon when more > distros > >> switch to the new cxx11 abi. I've opened > >> > >> http://trac.sagemath.org/ticket/20350 > >> > >> A workaround for now would be to uninstall your libqd-devel package > while > >> compiling libfplll, or prevent Sage from building its own gcc (you > probably > >> don't have gfortran installed) > >> > >> > >> > > -- > > You received this message because you are subscribed to the Google > Groups > > "sage-devel" group. > > To unsubscribe from this group and stop receiving emails from it, send > an > > email to sage-devel+...@googlegroups.com <javascript:>. > > To post to this group, send email to sage-...@googlegroups.com > <javascript:>. > > Visit this group at https://groups.google.com/group/sage-devel. > > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "sage-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-devel+unsubscr...@googlegroups.com. To post to this group, send email to sage-devel@googlegroups.com. Visit this group at https://groups.google.com/group/sage-devel. For more options, visit https://groups.google.com/d/optout.
