specfem3d-globe: add new package (#20830)

var/spack/repos/builtin/packages/specfem3d-globe/gcc_rm_werror.patch

@@ -0,0 +1,11 @@
+--- spack-src/flags.guess.org	2021-01-07 14:37:33.000000000 +0900
++++ spack-src/flags.guess	2021-01-07 14:38:07.000000000 +0900
+@@ -115,7 +115,7 @@
+ # with some versions of gfortran/gcc you make get errors about unused functions when compiling with the options below;
+ # if so, either change -Wunused to -Wunused -Werror=no-unused-function, or remove -Wunused, or remove -Werror
+ #
+-        DEF_FFLAGS="-std=gnu -fimplicit-none -frange-check -fmax-errors=10 -pedantic -pedantic-errors -Waliasing -Wampersand -Wcharacter-truncation -Wline-truncation -Wsurprising -Wno-tabs -Wunderflow -ffpe-trap=invalid,zero,overflow -Wunused -Werror" # -mcmodel=medium
++        DEF_FFLAGS="-std=gnu -fimplicit-none -frange-check -fmax-errors=10 -pedantic -pedantic-errors -Waliasing -Wampersand -Wcharacter-truncation -Wline-truncation -Wsurprising -Wno-tabs -Wunderflow -ffpe-trap=invalid,zero,overflow -Wunused" # -mcmodel=medium
+         OPT_FFLAGS="-O3 -finline-functions"
+         DEBUG_FFLAGS="-g -O0 -ggdb -fbacktrace -fbounds-check"
+         # useful to track loss of accuracy because of automatic double to single precision conversion:  -Wconversion  (this may generate many warnings...)

var/spack/repos/builtin/packages/specfem3d-globe/package.py

@@ -0,0 +1,63 @@
+# Copyright 2013-2021 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 Specfem3dGlobe(AutotoolsPackage, CudaPackage):
+    """Program specfem3D from SPECFEM3D_GLOBE is
+    a 3-D spectral-element solver for the Earth.
+    It uses a mesh generated by program meshfem3D."""
+
+    homepage = "https://github.com/geodynamics/specfem3d_globe"
+    url      = "https://github.com/geodynamics/specfem3d_globe/archive/v7.0.2.tar.gz"
+
+    version('7.0.2', sha256='78b4cfbe4e5121927ab82a8c2e821b65cdfff3e94d017303bf21af7805186d9b')
+
+    variant('opencl', default=False,
+            description="Build with OpenCL code generator")
+    variant('openmp', default=True,
+            description="Build with OpenMP code generator")
+    variant('double-precision', default=False,
+            description="Treat REAL as double precision")
+
+    depends_on('mpi')
+    depends_on('opencl', when='+opencl')
+
+    # When building with the gcc compiler,'Werror' is added to FFLAGS.
+    # In the case of using the gcc compiler and the default simulation
+    # settings, there is the process which always causes
+    # array out-of-bounds reference error.
+    # This issue will be fixed in version 8.0.0,
+    # so, remove '-Werror' when building with gcc compiler
+    # in versions up to 7.0.2 of specfem3d-globe.
+    # https://github.com/geodynamics/specfem3d_globe/issues/717
+    patch('gcc_rm_werror.patch', when='@:7.0.2%gcc')
+
+    def configure_args(self):
+        args = []
+
+        if '+cuda'   in self.spec:
+            args.append('--with-cuda')
+            args.append('CUDA_LIB={0}'
+                        .format(spec['cuda'].libs.directories[0]))
+            args.append('CUDA_INC={0}'
+                        .format(spec['cuda'].prefix.include))
+            args.append('MPI_INC={0}'
+                        .format(spec['mpi'].prefix.include))
+        if '+opencl' in self.spec:
+            args.append('--with-opencl')
+            args.append('OCL_LIB={0}'
+                        .format(spec['opencl'].libs.directories[0]))
+            args.append('OCL_INC={0}'
+                        .format(spec['opencl'].prefix.include))
+
+        args.extend(self.enable_or_disable('openmp'))
+        args.extend(self.enable_or_disable('double-precision'))
+
+        return args
+
+    def install(self, spec, prefix):
+        install_tree('.', prefix)