intel-xed: new package (#7106)

* intel-xed: new package

The Intel X86 Encoder Decoder library for encoding and decoding
x86 machine instructions.

* intel-xed: style fixes for flake8.

* intel-xed: better style fix

* intel-xed: update to version 2018.02.14, add PYTHONPATH for
building with python 3, cleanup the opt flag.

var/spack/repos/builtin/packages/intel-xed/package.py

@@ -0,0 +1,105 @@
+##############################################################################
+# Copyright (c) 2013-2017, 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/spack/spack
+# Please also see the NOTICE and LICENSE files 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 *
+import glob
+import os
+
+
+class IntelXed(Package):
+    """The Intel X86 Encoder Decoder library for encoding and decoding x86
+    machine instructions (64- and 32-bit).  Also includes libxed-ild,
+    a lightweight library for decoding the length of an instruction."""
+
+    homepage = "https://intelxed.github.io/"
+    url = "https://github.com/intelxed/xed"
+
+    version('2018.02.14',
+            git='https://github.com/intelxed/xed',
+            commit='44d06033b69aef2c20ab01bfb518c52cd71bb537')
+
+    resource(name='mbuild',
+             git='https://github.com/intelxed/mbuild',
+             commit='bb9123152a330c7fa1ff1a502950dc199c83e177',
+             destination='')
+
+    variant('debug', default=False, description='enable debug symbols')
+
+    depends_on('python@2.7:', type='build')
+
+    mycflags = []
+
+    # Save CFLAGS for use in install.
+    def flag_handler(self, name, flags):
+        if name == 'cflags':
+            self.mycflags = flags
+        return (flags, None, None)
+
+    def install(self, spec, prefix):
+        # XED needs PYTHONPATH to find the mbuild directory.
+        mbuild_dir = join_path(self.stage.source_path, 'mbuild')
+        python_path = os.getenv('PYTHONPATH', '')
+        os.environ['PYTHONPATH'] = mbuild_dir + ':' + python_path
+
+        mfile = Executable('./mfile.py')
+
+        args = ['-j', str(make_jobs),
+                '--cc=%s' % spack_cc,
+                '--no-werror']
+
+        if '+debug' in spec:
+            args.append('--debug')
+
+        # If an optimization flag (-O...) is specified in CFLAGS, use
+        # that, else set default opt level.
+        for flag in self.mycflags:
+            if len(flag) >= 2 and flag[0:2] == '-O':
+                break
+        else:
+            args.append('--opt=2')
+
+        # Build and install static libxed.a.
+        mfile('--clean')
+        mfile(*args)
+
+        mkdirp(prefix.include)
+        mkdirp(prefix.lib)
+
+        libs = glob.glob(join_path('obj', 'lib*.a'))
+        for lib in libs:
+            install(lib, prefix.lib)
+
+        # Build and install shared libxed.so.
+        mfile('--clean')
+        mfile('--shared', *args)
+
+        libs = glob.glob(join_path('obj', 'lib*.so'))
+        for lib in libs:
+            install(lib, prefix.lib)
+
+        # Install header files.
+        hdrs = glob.glob(join_path('include', 'public', 'xed', '*.h'))  \
+            + glob.glob(join_path('obj', '*.h'))
+        for hdr in hdrs:
+            install(hdr, prefix.include)