On Sun, Jan 5, 2020 at 6:22 PM Darij Grinberg <darijgrinb...@gmail.com> wrote: > > Aha. The build failure was caused by > https://trac.sagemath.org/ticket/27444 , exactly as embray's > comment:34 suggested. Undoing the 1-line change from that branch to > build/pkgs/fflas_ffpack/spkg-install and recompiling fflas_ffpack > (sage -f fflas_ffpack) got me through that point. Hope the rest of the > build goes smoothly... --Darij
Yep. You can also get around it without modifying *any* files by building Sage with: FFLAS_FFPACK_CONFIGURE=--disable-openmp I do think someone should look into this more. I don't know exactly why it happens: Why does fflas-ffpack try to build with OpenMP support if OpenMP support isn't actually working in the first place? Does it not check? Furthermore, it would be nice to see if you *can* get it working with OMP on Cygwin; I just haven't tried using OMP on Cygwin yet, though I believe it can work... > On Fri, Jan 3, 2020 at 5:13 PM Darij Grinberg <darijgrinb...@gmail.com> wrote: > > > > From the end of install.log: > > > > build/temp.cygwin-3.0.7-x86_64-3.7/build/cythonized/sage/matrix/matrix_modn_sparse.o: > > In function `FFPACK::rns_double::reduce(unsigned long, double*, unsigned > > long, bool) const': > > [sagelib-9.0] > > /home/skraeling/sage/local/include/fflas-ffpack/field/rns-double.inl:530: > > undefined reference to `omp_get_num_threads' > > [sagelib-9.0] > > /home/skraeling/sage/local/include/fflas-ffpack/field/rns-double.inl:533: > > undefined reference to `GOMP_parallel' > > [sagelib-9.0] > > build/temp.cygwin-3.0.7-x86_64-3.7/build/cythonized/sage/matrix/matrix_modn_sparse.o: > > In function `FFPACK::rns_double::init(unsigned long, unsigned long, > > double*, unsigned long, Givaro::Integer const*, unsigned long, unsigned > > long, bool) const': > > [sagelib-9.0] > > /home/skraeling/sage/local/include/fflas-ffpack/paladin/blockcuts.inl:67: > > undefined reference to `omp_get_num_threads' > > [sagelib-9.0] collect2: error: ld returned 1 exit status > > [sagelib-9.0] error: command 'g++' failed with exit status 1 > > [sagelib-9.0] make[4]: *** [Makefile:33: sage] Error 1 > > [sagelib-9.0] make[4]: Leaving directory '/home/skraeling/sage/src' > > > > This happens reproducibly both with "make" and with "make install", after > > the sagelib modules compile. There are further "undefined reference" > > messages all the way during the sagelib compilation process. > > > > Any ideas? > > > > Best regards & happy almost-new year, > > Darij > > > > -- > > You received this message because you are subscribed to a topic in the > > Google Groups "sage-devel" group. > > To unsubscribe from this topic, visit > > https://groups.google.com/d/topic/sage-devel/O06i87XYpz8/unsubscribe. > > To unsubscribe from this group and all its topics, send an email to > > sage-devel+unsubscr...@googlegroups.com. > > To view this discussion on the web visit > > https://groups.google.com/d/msgid/sage-devel/e3b50139-609f-4a06-bed5-2bc65ed89b35%40googlegroups.com. > > -- > 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 view this discussion on the web visit > https://groups.google.com/d/msgid/sage-devel/CAN3jM_nWAK7Ccb3bVR-xWpOZ6A_TcL8tsz1r0Zzx7y%2BA0VH2hQ%40mail.gmail.com. -- 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 view this discussion on the web visit https://groups.google.com/d/msgid/sage-devel/CAOTD34aoP2Cf-wdfWy5WfNw_Y1Gj07jYnA7J9dN8Uj6VoUGjLw%40mail.gmail.com.
