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# Copyright 2013-2022 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 Essl(BundlePackage):
"""IBM's Engineering and Scientific Subroutine Library (ESSL)."""
homepage = "https://www.ibm.com/systems/power/software/essl/"
# https://www.ibm.com/docs/en/essl/6.2?topic=whats-new
version('6.2.1.1')
variant('ilp64', default=False, description='64 bit integers')
variant(
'threads', default='openmp',
description='Multithreading support',
values=('openmp', 'none'),
multi=False
)
variant('cuda', default=False, description='CUDA acceleration')
provides('blas')
conflicts('+cuda', when='+ilp64',
msg='ESSL+cuda+ilp64 cannot combine CUDA acceleration'
' 64 bit integers')
conflicts('+cuda', when='threads=none',
msg='ESSL+cuda threads=none cannot combine CUDA acceleration'
' without multithreading support')
@property
def blas_libs(self):
spec = self.spec
prefix = self.prefix
if '+ilp64' in spec:
essl_lib = ['libessl6464']
else:
essl_lib = ['libessl']
if spec.satisfies('threads=openmp'):
# ESSL SMP support requires XL or Clang OpenMP library
if '%xl' in spec or '%xl_r' in spec or '%clang' in spec:
if '+ilp64' in spec:
essl_lib = ['libesslsmp6464']
else:
if '+cuda' in spec:
essl_lib = ['libesslsmpcuda']
else:
essl_lib = ['libesslsmp']
essl_root = prefix.lib64
essl_libs = find_libraries(
essl_lib,
root=essl_root,
shared=True
)
return essl_libs
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