Add new package: xmlrpc-c (#18828)

var/spack/repos/builtin/packages/xmlrpc-c/package.py

@@ -0,0 +1,21 @@
+# 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 XmlrpcC(AutotoolsPackage):
+    """Programming library for writing an XML-RPC server or client in
+    C or C++."""
+
+    homepage = "https://sourceforge.net/projects/xmlrpc-c/"
+    url      = "https://sourceforge.net/projects/xmlrpc-c/files/Xmlrpc-c%20Super%20Stable/1.51.06/xmlrpc-c-1.51.06.tgz"
+
+    version('1.51.06', sha256='06dcd87d9c88374559369ffbe83b3139cf41418c1a2d03f20e08808085f89fd0')
+
+    @when('target=aarch64:')
+    def configure_args(self):
+        args = ['--build=arm-linux']
+        return args