mt-metis: New package. (#16380)

* mt-metis: New package.

* variant to 1 line.

* delete useless lines.

var/spack/repos/builtin/packages/mt-metis/non_x8664.patch

@@ -0,0 +1,14 @@
+diff --git a/domlib/dlmacros.h b/domlib/dlmacros.h
+index 2cbca90..d231b75 100644
+--- a/domlib/dlmacros.h
++++ b/domlib/dlmacros.h
+@@ -211,7 +211,9 @@
+ #else
+ static inline void _mm_pause(void)
+ {
++#ifdef _x86_64__
+   __asm__ ( "pause;" );
++#endif
+ }
+ #endif
+ 

var/spack/repos/builtin/packages/mt-metis/package.py

@@ -0,0 +1,37 @@
+# Copyright 2013-2020 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 MtMetis(CMakePackage):
+    """
+    mt-Metis is a multithreaded multilevel graph partitioning an ordering
+    tool. It is based on the algorithms used in Metis and ParMetis
+    """
+
+    homepage = "http://glaros.dtc.umn.edu/gkhome/views/metis"
+    url      = "http://glaros.dtc.umn.edu/gkhome/fetch/sw/metis/mt-metis-0.6.0.tar.gz"
+
+    version('0.6.0', sha256='cb8fb836b630a899edbeca4e1da19ec9eb47e89903bda83e7ec62cb0ffdcc284')
+
+    # avoid asm('pause') for no x86_64 familly.
+    patch('non_x8664.patch')
+
+    variant('shared', default=True, description='Enable build of shared libraries')
+
+    def cmake_args(self):
+        define = CMakePackage.define
+        cmake_args = [
+            define('DOMLIB_PATH', 'domlib'),
+            define('WILDRIVER_PATH', 'wildriver'),
+            define('METIS_PATH', 'metis'),
+            self.define_from_variant('SHARED', 'shared'),
+        ]
+        return cmake_args
+
+    @property
+    def libs(self):
+        return find_libraries(['libmtmetis', 'libwildriver'], self.prefix.lib)