e7f2d17338
These variables will always be imported from the environment, and never from previous builds. For SCons to actually use these values, they need to not only be in the environment variables external commands SCons runs sees, they also have to be promoted to actual SCons construction variables. Change-Id: I54035442d70972396f1788bd0773877222d7a7c5 Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/56386 Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-by: Jason Lowe-Power <power.jg@gmail.com> Maintainer: Jason Lowe-Power <power.jg@gmail.com> Tested-by: kokoro <noreply+kokoro@google.com>
91 lines
4.3 KiB
Python
91 lines
4.3 KiB
Python
# Copyright (c) 2013, 2015-2017 ARM Limited
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# All rights reserved.
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#
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# The license below extends only to copyright in the software and shall
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# not be construed as granting a license to any other intellectual
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# property including but not limited to intellectual property relating
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# to a hardware implementation of the functionality of the software
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# licensed hereunder. You may use the software subject to the license
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# terms below provided that you ensure that this notice is replicated
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# unmodified and in its entirety in all distributions of the software,
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# modified or unmodified, in source code or in binary form.
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#
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# Copyright (c) 2011 Advanced Micro Devices, Inc.
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# Copyright (c) 2009 The Hewlett-Packard Development Company
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# Copyright (c) 2004-2005 The Regents of The University of Michigan
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are
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# met: redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer;
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# redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution;
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# neither the name of the copyright holders nor the names of its
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# contributors may be used to endorse or promote products derived from
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# this software without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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import os
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from gem5_python_paths import extra_python_paths
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def EnvDefaults(env):
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# export TERM so that clang reports errors in color
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use_vars = set([ 'AS', 'AR', 'CC', 'CXX', 'HOME', 'LD_LIBRARY_PATH',
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'LIBRARY_PATH', 'PATH', 'PKG_CONFIG_PATH', 'PROTOC',
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'PYTHONPATH', 'RANLIB', 'TERM' ])
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use_prefixes = [
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"ASAN_", # address sanitizer symbolizer path and settings
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"CCACHE_", # ccache (caching compiler wrapper) configuration
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"CCC_", # clang static analyzer configuration
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"DISTCC_", # distcc (distributed compiler wrapper) config
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"INCLUDE_SERVER_", # distcc pump server settings
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"M5", # M5 configuration (e.g., path to kernels)
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"NIX_", # wrapped binaries if using nix package manager
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]
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for key,val in sorted(os.environ.items()):
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if key in use_vars or \
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any([key.startswith(prefix) for prefix in use_prefixes]):
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env['ENV'][key] = val
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# These variables from the environment override/become SCons variables,
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# with a default if they weren't in the host environment.
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var_overrides = {
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'CC': env['CC'],
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'CXX': env['CXX'],
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'PROTOC': 'protoc'
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}
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for key,default in var_overrides.items():
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env[key] = env['ENV'].get(key, default)
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# Tell scons to avoid implicit command dependencies to avoid issues
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# with the param wrappes being compiled twice (see
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# https://github.com/SCons/scons/issues/2811
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env['IMPLICIT_COMMAND_DEPENDENCIES'] = 0
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env.Decider('MD5-timestamp')
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# add useful python code PYTHONPATH so it can be used by subprocesses
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# as well
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env.AppendENVPath('PYTHONPATH', extra_python_paths)
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# Default duplicate option is to use hard links, but this messes up
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# when you use emacs to edit a file in the target dir, as emacs moves
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# file to file~ then copies to file, breaking the link. Symbolic
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# (soft) links work better.
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env.SetOption('duplicate', 'soft-copy')
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