default.py revision 12244 
1# Copyright (c) 2013, 2015-2017 ARM Limited
2# All rights reserved.
3#
4# The license below extends only to copyright in the software and shall
5# not be construed as granting a license to any other intellectual
6# property including but not limited to intellectual property relating
7# to a hardware implementation of the functionality of the software
8# licensed hereunder.  You may use the software subject to the license
9# terms below provided that you ensure that this notice is replicated
10# unmodified and in its entirety in all distributions of the software,
11# modified or unmodified, in source code or in binary form.
12#
13# Copyright (c) 2011 Advanced Micro Devices, Inc.
14# Copyright (c) 2009 The Hewlett-Packard Development Company
15# Copyright (c) 2004-2005 The Regents of The University of Michigan
16# All rights reserved.
17#
18# Redistribution and use in source and binary forms, with or without
19# modification, are permitted provided that the following conditions are
20# met: redistributions of source code must retain the above copyright
21# notice, this list of conditions and the following disclaimer;
22# redistributions in binary form must reproduce the above copyright
23# notice, this list of conditions and the following disclaimer in the
24# documentation and/or other materials provided with the distribution;
25# neither the name of the copyright holders nor the names of its
26# contributors may be used to endorse or promote products derived from
27# this software without specific prior written permission.
28#
29# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
30# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
31# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
32# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
33# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
34# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
35# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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39# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
40
41import os
42
43import SCons.Tool
44import SCons.Tool.default
45
46def common_config(env):
47    # export TERM so that clang reports errors in color
48    use_vars = set([ 'AS', 'AR', 'CC', 'CXX', 'HOME', 'LD_LIBRARY_PATH',
49                     'LIBRARY_PATH', 'PATH', 'PKG_CONFIG_PATH', 'PROTOC',
50                     'PYTHONPATH', 'RANLIB', 'TERM' ])
51
52    use_prefixes = [
53        "ASAN_",           # address sanitizer symbolizer path and settings
54        "CCACHE_",         # ccache (caching compiler wrapper) configuration
55        "CCC_",            # clang static analyzer configuration
56        "DISTCC_",         # distcc (distributed compiler wrapper) config
57        "INCLUDE_SERVER_", # distcc pump server settings
58        "M5",              # M5 configuration (e.g., path to kernels)
59        ]
60
61    for key,val in sorted(os.environ.iteritems()):
62        if key in use_vars or \
63                any([key.startswith(prefix) for prefix in use_prefixes]):
64            env[key] = val
65
66    # Tell scons to avoid implicit command dependencies to avoid issues
67    # with the param wrappes being compiled twice (see
68    # http://scons.tigris.org/issues/show_bug.cgi?id=2811)
69    env['IMPLICIT_COMMAND_DEPENDENCIES'] = 0
70    env.Decider('MD5-timestamp')
71    env.root = env.Dir('#')
72    env.srcdir = env.root.Dir('src')
73
74gem5_tool_list = [
75    'git',
76    'mercurial',
77]
78
79def generate(env):
80    common_config(env)
81    SCons.Tool.default.generate(env)
82    for tool in gem5_tool_list:
83        SCons.Tool.Tool(tool)(env)
84
85def exists(env):
86    return 1
87