libblastrampoline: new package (#21825)

* libblastrampoline: new package

* Apply suggestions from code review

Co-authored-by: Adam J. Stewart <ajstewart426@gmail.com>

Co-authored-by: Adam J. Stewart <ajstewart426@gmail.com>

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

@@ -0,0 +1,21 @@
+# 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 Libblastrampoline(MakefilePackage):
+    """Using PLT trampolines to provide a BLAS and LAPACK demuxing library."""
+
+    homepage = "https://github.com/staticfloat/libblastrampoline"
+    git      = "https://github.com/staticfloat/libblastrampoline.git"
+
+    version('2.2.0', commit='45f4a20ffdba5d368db66d71885312f5f73c2dc7')
+
+    build_directory = 'src'
+
+    def install(self, spec, prefix):
+        with working_dir(self.build_directory):
+            make('prefix={0}'.format(prefix), 'install')