Add new package: tpm2-tss (#18824)

* Add new package: tpm2-tss

* remove patch(), there's no need to use it

var/spack/repos/builtin/packages/tpm2-tss/package.py

@@ -0,0 +1,43 @@
+# 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 Tpm2Tss(AutotoolsPackage):
+    """OSS implementation of the TCG TPM2 Software Stack (TSS2)"""
+
+    homepage = "https://tpm2-software.github.io/"
+    url      = "https://github.com/tpm2-software/tpm2-tss/archive/3.0.0.tar.gz"
+
+    version('3.0.0', sha256='e88e91aeee2e01ccc45596fb8afcc3b521a660dcebe5a6e1b14ea5e9e5c15cf5')
+    version('2.4.2', sha256='1cec5e834a6a750b138cabcd100b3fcd12b16cd21fa4f9103739914743511f75')
+    version('2.4.1', sha256='cc6f0691307f3c65d5a1375e2cd22508cc72850dbc70eb820b892f0b3d0cbea2')
+
+    depends_on('autoconf', type='build')
+    depends_on('automake', type='build')
+    depends_on('libtool',  type='build')
+    depends_on('m4',       type='build')
+    depends_on('autoconf-archive', type='build')
+    depends_on('json-c')
+    depends_on('curl')
+    depends_on('doxygen', type='build', when='@:2.4.2')
+    depends_on('libgcrypt', when='@:2.4.2')
+
+    @when('@:2.4.2')
+    def setup_build_environment(self, env):
+        env.prepend_path('ACLOCAL_PATH',
+                         self.spec['libgcrypt'].prefix.share.aclocal)
+        env.prepend_path('ACLOCAL_PATH',
+                         self.spec['autoconf-archive'].prefix.share.aclocal)
+
+    @when('@3.0.0:')
+    def setup_build_environment(self, env):
+        env.prepend_path('ACLOCAL_PATH',
+                         self.spec['autoconf-archive'].prefix.share.aclocal)
+
+    def autoreconf(self, spec, prefix):
+        sh = which('sh')
+        sh('./bootstrap')