This is because automatic blas/lapack detection is a hopeless task. You should pass your lapack libraries to the configuration script. If you can’t, hack it. And now that we have switched to openblas, -lopenblas provides lapack.
François > On 21/10/2016, at 10:04, Emmanuel Charpentier <emanuel.charpent...@gmail.com> > wrote: > > Something just changed in the Sage build process : as of 7.4, LAPACK is no > longer available to programs running in the Sage shell. > > Case in point : I want to install JAGS (an MCMC sampler), which is needed by > the rjags R package, of some use to Bayesian R users... This package compiled > fine in the Sage shell up to Sage 7.4beta6. Now, the --configure step fails > with : > > checking for cheev_ in -llapack... no > checking for cheev_ in -llapack_rs6k... no > configure: error: "You need to install the LAPACK library" > > Indeed : > > charpent@asus16-ec:~$ find /usr/local/sage-7/ -iname "*lapack*so*" > /usr/local/sage-7/local/lib/R/modules/lapack.so > /usr/local/sage-7/local/lib/python2.7/site-packages/cvxopt/lapack.so > /usr/local/sage-7/local/lib/python2.7/site-packages/numpy/linalg/lapack_lite.so > /usr/local/sage-7/local/lib/python2.7/site-packages/scipy/linalg/_flapack.so > /usr/local/sage-7/local/lib/python2.7/site-packages/scipy/linalg/cython_lapack.so > charpent@asus16-ec:~$ find /usr/local/sage-7/ -iname "*lapack*h*" > /usr/local/sage-7/local/lib/R/include/R_ext/Lapack.h > /usr/local/sage-7/local/include/lapacke_mangling.h > /usr/local/sage-7/local/include/linbox/algorithms/numeric-solver-lapack.h > /usr/local/sage-7/local/include/lapacke_config.h > /usr/local/sage-7/local/include/lapacke.h > > > Short of forcing the Sage build process to use the system's LAPACK (which can > be done but, as far as I know, is not recommended), I don't see how to force > the creation of this library and its header file. > > Note that could be useful to reduce overhead : R (standard package) creates > its own version (probably for lack of finding it at build time...) ; it also > exists in the python package cvxopt. > > 1) What do you think ? > > 2) Should a ticket be filed ? > > HTH, > > -- > Emmanuel Charpentier > > -- > 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. -- 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.
