New package yaml-cpp (#2399)

* Adding new package for yaml-cpp.

* Removing gcc specific c++11 flag. Adding fpic variant. Fixing formatting.

var/spack/repos/builtin/packages/yaml-cpp/package.py

@@ -0,0 +1,49 @@
+##############################################################################
+# Copyright (c) 2013-2016, Lawrence Livermore National Security, LLC.
+# Produced at the Lawrence Livermore National Laboratory.
+#
+# This file is part of Spack.
+# Created by Todd Gamblin, tgamblin@llnl.gov, All rights reserved.
+# LLNL-CODE-647188
+#
+# For details, see https://github.com/llnl/spack
+# Please also see the LICENSE file for our notice and the LGPL.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License (as
+# published by the Free Software Foundation) version 2.1, February 1999.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the IMPLIED WARRANTY OF
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the terms and
+# conditions of the GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+##############################################################################
+from spack import *
+
+
+class YamlCpp(Package):
+    """A YAML parser and emitter in C++"""
+
+    homepage = "https://github.com/jbeder/yaml-cpp"
+    url      = \
+    "https://github.com/jbeder/yaml-cpp/archive/yaml-cpp-0.5.3.tar.gz"
+
+    version('0.5.3', '4e47733d98266e46a1a73ae0a72954eb')
+
+    variant('fpic',    default=False,
+            description='Build with position independent code')
+
+    depends_on('cmake', type='build')
+
+    def install(self, spec, prefix):
+        with working_dir('spack-build', create=True):
+            args = std_cmake_args
+            if '+fpic' in spec: 
+                args += ['-DCMAKE_POSITION_INDEPENDENT_CODE:BOOL=true']
+            cmake('..', *args)
+            make()
+            make("install")