add tandem package (#36546)

* add tandem package
* apply black
* fix import
* fix year of license
* add version 1.0 and associated compile fix
* change git to property
* add conflict to intel

var/spack/repos/builtin/packages/tandem/fix_v1.0_compilation.diff

@@ -0,0 +1,29 @@
+diff --git a/app/CMakeLists.txt b/app/CMakeLists.txt
+index 515f15f..bc48092 100644
+--- a/app/CMakeLists.txt
++++ b/app/CMakeLists.txt
+@@ -82,9 +82,9 @@ function(generate_code APP)
+     if("${YATETO_ARCH}" MATCHES "skl|naples|rome")
+         set(YATETO_ARCH "hsw")
+     endif()
+-    set(WITH_LIBXSMM "")
++    set(WITH_LIBXSMM "\'\'")
+     if(${LibxsmmGenerator_FOUND})
+-        set(WITH_LIBXSMM ${LibxsmmGeneratorExecutable})
++        set(WITH_LIBXSMM "\'${LibxsmmGeneratorExecutable}\'")
+     endif()
+     add_custom_command(
+         COMMAND
+diff --git a/src/mesh/Simplex.h b/src/mesh/Simplex.h
+index 6a2cf29..36b0be3 100644
+--- a/src/mesh/Simplex.h
++++ b/src/mesh/Simplex.h
+@@ -7,7 +7,7 @@
+ #include <cstddef>
+ #include <cstdint>
+ #include <utility>
+-
++#include <limits>
+ #include "util/Combinatorics.h"
+ 
+ namespace tndm {

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

@@ -0,0 +1,72 @@
+# Copyright 2013-2023 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.package import *
+
+
+class Tandem(CMakePackage):
+    """Tandem is a scientific software for SEAS modelling and for solving Poisson
+    and linear elasticity problems. It implements the Symmetric Interior Penalty
+    Galerkin (SIPG) method using unstructured simplicial meshes (triangle meshes
+    in 2D, tetrahedral meshes in 3D)."""
+
+    homepage = "https://tandem.readthedocs.io/en/latest/"
+    git = "https://github.com/TEAR-ERC/tandem.git"
+    version("main", branch="main", submodules=True)
+
+    # we cannot use the tar.gz file because it does not contains submodules
+    version("1.0", tag="v1.0", submodules=True)
+    patch("fix_v1.0_compilation.diff", when="@1.0")
+
+    maintainers = ["dmay23", "Thomas-Ulrich"]
+    variant("polynomial_degree", default="2")
+    variant("domain_dimension", default="2", values=("2", "3"), multi=False)
+    variant("min_quadrature_order", default="0")
+    variant("libxsmm", default=False, description="installs libxsmm-generator")
+
+    depends_on("mpi")
+    depends_on("parmetis +int64 +shared")
+    depends_on("metis +int64 +shared")
+    depends_on("libxsmm@1.17 +generator", when="+libxsmm target=x86_64:")
+    depends_on("lua@5.3.2:5.4.4")
+    depends_on("eigen@3.4.0")
+    depends_on("zlib@1.2.8:1.2.13")
+    depends_on("petsc@3.14.6:3.18.5 +int64 +mumps +scalapack")
+    depends_on("petsc@3.14.6:3.18.5 +int64 +mumps +scalapack +knl", when="target=skylake:")
+    # see https://github.com/TEAR-ERC/tandem/issues/45
+    conflicts("%intel")
+
+    def cmake_args(self):
+        args = [
+            self.define_from_variant("DOMAIN_DIMENSION", "domain_dimension"),
+            self.define_from_variant("POLYNOMIAL_DEGREE", "polynomial_degree"),
+            self.define_from_variant("MIN_QUADRATURE_ORDER", "min_quadrature_order"),
+        ]
+
+        arch_dic = {}
+        arch_dic["skylake"] = "skl"
+        arch_dic["skylake_avx512"] = "skx"
+        arch_dic["haswell"] = "hsw"
+        arch_dic["sandybridge"] = "snb"
+        arch_dic["zen2"] = "rome"
+        arch_dic["zen"] = "naples"
+        target = str(self.spec.target)
+
+        if target in arch_dic:
+            args.append("-DARCH=" + arch_dic[target])
+        else:
+            print(target, "not in arch list of tandem, using native")
+            args.append("-DARCH=native")
+
+        return args
+
+    def install(self, spec, prefix):
+        self.cmake(spec, prefix)
+        self.build(spec, prefix)
+        install_tree(self.build_directory, prefix)
+
+    def setup_run_environment(self, env):
+        env.prepend_path("PATH", self.prefix.app)