New package: gpu-burn (#13108)

var/spack/repos/builtin/packages/gpu-burn/Makefile.patch

+--- a/Makefile	2018-12-08 05:36:48.000000000 -0600
++++ b/Makefile	2019-10-04 13:08:37.095337704 -0500
+@@ -1,12 +1,6 @@
+-CUDAPATH=/usr/local/cuda
+-
+-# Have this point to an old enough gcc (for nvcc)
+-GCCPATH=/usr
+-
+ NVCC=nvcc
+-CCPATH=${GCCPATH}/bin
+ 
+ drv:
+-	PATH=${PATH}:.:${CCPATH}:${PATH} ${NVCC} -I${CUDAPATH}/include -arch=compute_30 -ptx compare.cu -o compare.ptx
+-	g++ -O3 -Wno-unused-result -I${CUDAPATH}/include -c gpu_burn-drv.cpp
+-	g++ -o gpu_burn gpu_burn-drv.o -O3 -lcuda -L${CUDAPATH}/lib64 -L${CUDAPATH}/lib -Wl,-rpath=${CUDAPATH}/lib64 -Wl,-rpath=${CUDAPATH}/lib -lcublas -lcudart -o gpu_burn
++	${NVCC} -arch=compute_30 -ptx compare.cu -o compare.ptx
++	g++ -O3 -Wno-unused-result -c gpu_burn-drv.cpp
++	g++ -o gpu_burn gpu_burn-drv.o -O3 -lcuda -lcublas -lcudart -o gpu_burn

var/spack/repos/builtin/packages/gpu-burn/package.py

+# 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 GpuBurn(MakefilePackage, CudaPackage):
+    """Multi-GPU CUDA stress test. Note that the file pointed to by COMPARE_PTX
+    needs to be copied or linked to the current working directory before
+    running gpu_burn."""
+
+    homepage = "http://wili.cc/blog/gpu-burn.html"
+    url      = "http://wili.cc/blog/entries/gpu-burn/gpu_burn-1.0.tar.gz"
+
+    version('1.0', sha256='d55994f0bee8dabf021966dbe574ef52be1e43386faeee91318dd4ebb36aa74a')
+
+    patch('Makefile.patch')
+
+    # This package uses CudaPackage to pick up the cuda_arch variant. A side
+    # effect is that it also picks up the cuda variant, but cuda is required
+    # for gpu-burn so is not really a variant.
+    variant('cuda', 'True', description='Use CUDA; must be true')
+
+    conflicts('~cuda', msg='gpu-burn requires cuda')
+
+    def edit(self, spec, prefix):
+        # update cuda architecture if necessary
+        if '+cuda' in self.spec:
+            cuda_arch = self.spec.variants['cuda_arch'].value
+            archflag = ''
+
+            if cuda_arch != 'none':
+                if len(cuda_arch) > 1:
+                    raise InstallError(
+                        'gpu-burn only supports compilation for a single GPU'
+                        'type.'
+                    )
+                archflag = '-arch=compute_{0}'.format(cuda_arch[0])
+
+            filter_file('-arch=compute_30', archflag,
+                        'Makefile', string=True)
+
+    def install(self, spec, prefix):
+        mkdir(prefix.bin)
+        mkdir(prefix.share)
+        install('gpu_burn', prefix.bin)
+        install('compare.ptx', prefix.share)
+
+    # The gpu_burn program looks for the compare.ptx file in the current
+    # working directory. Create an environment variable that can be pointed to
+    # so that it can be copied or linked.
+    def setup_environment(self, spack_env, run_env):
+        run_env.set('COMPARE_PTX', join_path(self.prefix.share, 'compare.ptx'))