jags: lapack fix (#6764)

* jags: fixing openblas thows a lapack error when compiling. atlas works. other lapack providers may work. also adding tags

* changing blas/lapack reference

* removing openblas conflict

* jags: whitespace cleanup for flake8

var/spack/repos/builtin/packages/jags/package.py

@@ -30,6 +30,8 @@ class Jags(AutotoolsPackage):
        Bayesian hierarchical models using Markov Chain Monte Carlo (MCMC)
        simulation not wholly unlike BUGS"""
 
+    tags = ['mcmc', 'Gibbs sampler']
+
     homepage = "http://mcmc-jags.sourceforge.net/"
     url = "https://downloads.sourceforge.net/project/mcmc-jags/JAGS/4.x/Source/JAGS-4.2.0.tar.gz"
 
@@ -39,6 +41,6 @@ class Jags(AutotoolsPackage):
     depends_on('lapack')
 
     def configure_args(self):
-        args = ['--with-blas=-L%s' % self.spec['blas'].prefix.lib,
-                '--with-lapack=-L%s' % self.spec['lapack'].prefix.lib]
+        args = ['--with-blas=%s' % self.spec['blas'].libs.ld_flags,
+                '--with-lapack=%s' % self.spec['lapack'].libs.ld_flags]
         return args