to use system-wide BLAS/LAPACK, set SAGE_ATLAS_LIB as described in http://doc.sagemath.org/html/en/installation/source.html#environment-variables This might be the easiest way to proceed to get working Sage, although you might need to build from scratch (i.e. after make distclean)
I guess your current problem comes from a broken blas lib. There is a way to test your openblas install: rebuilt it with SAGE_CHECK=yes ./sage -f openblas - it will run openblas selfchecks (if they all work then it's fflas_ffpack problem, I suppose) Also, perhaps using the experimental openblas from https://github.com/xianyi/OpenBLAS/ might help - hard to tell without a possibility to test on a processor like yours. On Thursday, March 2, 2017 at 9:13:32 PM UTC, [email protected] wrote: > > First problem: my laptop has an AMD A12-9700P RADEON R7 and openblas > doesn't recognize my processor. Okay whatever, I can get that to build with > > export OPENBLAS_CONFIGURE="TARGET=OPTERON_SSE3" > > but then when I run make again, it fails to build fflas, despite > pkg-config finding openblas when I enter the sage-shell. > > ... > ... > checking for use of MKL... no > checking for USER BLAS... problem > checking for USER LAPACK... yes (lapack) > > > ******************************************************************************* > ERROR: BLAS not found! > > BLAS routines are required for this library to compile. Please > make sure BLAS are installed and specify its location with the option > --with-blas-libs=<libs> and if necessary --with-blas-cflags=<cflags> > when running configure. > > I've tried to force fflas to link against my system blas by tweaking > spkg-install, and even that doesn't work. Is there an easy way to get > more information out of fflas than "problem"? Because there's > probably a relevant error message getting deleted here. > -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
