added a package butterflypack (#12222)

* added a package butterflypack

* remove one line in the python script

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

@@ -0,0 +1,59 @@
+# Copyright 2013-2019 Lawrence Livermore National Security, LLC and other
+# Spack Project Developers. See the top-level COPYRIGHT file for details.
+#
+# SPDX-License-Identifier: (Apache-2.0 OR MIT)
+
+from spack import *
+
+
+class Butterflypack(CMakePackage):
+    """ButterflyPACK is a mathematical software for rapidly solving
+    large-scale dense linear systems that exhibit off-diagonal rank-deficiency.
+    These systems arise frequently from boundary element methods, or
+    factorization phases in finite-difference/finite-element methods.
+    ButterflyPACK relies on low-rank or butterfly formats under Hierarchical
+    matrix, HODLR or other hierarchically nested frameworks to compress,
+    factor and solve the linear system in quasi-linear time. The
+    computationally most intensive phase, factorization, is accelerated via
+    randomized linear algebras. The butterfly format, originally inspired by
+    the butterfly data flow in fast Fourier Transform, is a linear algebra tool
+    well-suited for compressing matrices arising from high-frequency wave
+    equations or highly oscillatory integral operators."""
+
+    homepage = "https://github.com/liuyangzhuan/ButterflyPACK"
+    git      = "https://github.com/liuyangzhuan/ButterflyPACK.git"
+
+    maintainers = ['liuyangzhuan']
+
+    version('master', branch='master')
+
+    variant('shared', default=True, description='Build shared libraries')
+
+    depends_on('mpi')
+    depends_on('blas')
+    depends_on('lapack')
+    depends_on('scalapack')
+    depends_on('arpack-ng')
+
+    def cmake_args(self):
+        spec = self.spec
+
+        def on_off(varstr):
+            return 'ON' if varstr in spec else 'OFF'
+
+        args = [
+            '-DCMAKE_C_COMPILER=%s' % spec['mpi'].mpicc,
+            '-DCMAKE_Fortran_COMPILER=%s' % spec['mpi'].mpifc,
+            '-DCMAKE_CXX_COMPILER=%s' % spec['mpi'].mpicxx,
+            '-DTPL_BLAS_LIBRARIES=%s' % spec['blas'].libs.joined(";"),
+            '-DTPL_LAPACK_LIBRARIES=%s' % spec['lapack'].libs.joined(";"),
+            '-DTPL_SCALAPACK_LIBRARIES=%s' % spec['scalapack'].
+            libs.joined(";"),
+            '-DTPL_ARPACK_LIBRARIES=%s' % spec['arpack-ng'].libs.joined(";"),
+        ]
+
+        args.extend([
+            '-DBUILD_SHARED_LIBS=%s' % on_off('+shared')
+        ])
+
+        return args