configuration failure when R is built against external LAPACK/BLAS

[loveshack]

The EPEL8 packages for RHEL8 etc. have this configuration, for which configure fails to find the right libraries (which I noticed because I'd deleted the lapack directory in the packaging for float):

$ R CMD config BLAS_LIBS
-lopenblas
$ R CMD config LAPACK_LIBS

$

I fixed it with a patch against the 0.2-4 source which is at

https://copr-dist-git.fedorainfracloud.org/cgit/loveshack/livhpc/R-float.git/plain/R-float-conf.patch?h=epel8